PROPULSION SYSTEM FOR A MARINE VESSEL

Abstract

A propulsion system for a marine vessel includes a transom bracket configured to be connected to a transom of the marine vessel, a drive unit being rotatably connected with the transom bracket so as to be pivotable by a tilt arrangement from a lowered position into a raised position, or vice versa, about a pivot joint, and a trim arrangement being arranged between the transom bracket and the drive unit to adjust a trim angle of the drive unit when in the lowered position. A trim arrangement lock is arranged to be connected with the trim arrangement for a range of trim angles of the drive unit in the lowered position so as to prevent pivoting of the drive unit by the tilt arrangement inside the range of trim angles, and the trim arrangement lock is configured to be disconnected from the trim arrangement outside the range of trim angles so as to allow pivoting of the drive unit by the tilt arrangement.

Claims

1. A propulsion system for a marine vessel, comprising a transom bracket configured to be connected to a transom of the marine vessel, a drive unit being rotatably connected with the transom bracket so as to be pivotable by a tilt arrangement from a lowered position into a raised position, or vice versa, about a pivot joint, and a trim arrangement being arranged between the transom bracket and the drive unit to adjust a trim angle of the drive unit when in the lowered position, further comprising a trim arrangement lock being arranged to be connected with the trim arrangement for a range of trim angles of the drive unit in the lowered position so as to prevent pivoting of the drive unit by the tilt arrangement inside the range of trim angles, and the trim arrangement lock is configured to be disconnected from the trim arrangement outside the range of trim angles so as to allow pivoting of the drive unit by the tilt arrangement.

2. The propulsion system of claim 1, wherein the trim arrangement comprises at least one linear trim actuator, the trim actuator has a connection part arranged at an end of the trim actuator.

3. The propulsion system of claim 2, wherein the connection part is arranged at the end opposite the drive unit, or the connection part is arranged in the end opposite the transom bracket.

4. The propulsion system of claim 2, wherein an opposite end of the trim actuator compared to the connection part is connected to the transom bracket or the drive unit.

5. The propulsion system of claim 4, wherein the opposite end of the trim actuator is securely fastened to either the transom bracket or the drive unit.

6. The propulsion system of claim 1, wherein trim arrangement lock is arranged on the drive unit or at the transom bracket.

7. The propulsion system of claim 2, wherein the trim arrangement lock is configured to receive the connection part or the connection part is configured to receive the trim arrangement lock inside the range of trim angles and otherwise being disengaged.

8. The propulsion system of claim 7, wherein the trim arrangement lock and the connection part are geometrically engaged inside the range of trim angles and are disengaged outside the range of trim angles.

9. The propulsion system of claim 1, wherein the trim arrangement lock or the trim arrangement is configured to be moved along a trajectory of a rotation radius having the pivot joint as a center.

10. The propulsion system of claim 2, wherein the trim arrangement lock is configured to receive the connection part of the trim actuator or is configured to engage the connection part.

11. The propulsion system of claim 10, wherein the trim arrangement lock and the connection part are geometrically connected and/or engaged inside the range of trim angles.

12. The propulsion system of claim 10, wherein the trim arrangement lock comprises a receptacle, a slot, a recess, a bended member, a U-formed member, an inverted U-formed member, a helically or spirally formed member, or similar, when being configured to receive the connection part.

13. The propulsion system of claim 12, wherein the connecting part comprises a geometrical shape configured to engage the trim arrangement lock, such as a projection, a spherical member, a knob, or similar.

14. The propulsion system of claim 12, wherein the trim arrangement lock has an inlet through which the connecting part can enter or leave outside the range of trim angles and a face being configured to maintain the connection part in the trim arrangement lock inside the range of trim angles.

15. The propulsion system of claim 14, wherein the inlet tapers so as assisting the connecting part in enter and leaving the trim arrangement lock.

16. The propulsion system of claim 1, wherein the tilt arrangement comprises a linear tilt actuator and/or a rotatory actuator or motor.

17. The propulsion system of claim 1, further comprising a control unit configured to control the trim arrangement and/or the tilt arrangement.

18. A marine vessel comprising a transom and a propulsion system of claim 1.

19. A method for trimming and tilting a drive unit of a propulsion system, comprising arranging a propulsion system of claim 1 on a marine vessel, arranging the drive unit in the lowered position, trimming the drive unit by the trim arrangement inside a range of trim angles while the trim arrangement is connected with the trim arrangement lock, pivoting the drive unit outside the range of trim angles so that the trim arrangement is disconnected from the trim arrangement lock, tilting the drive unit to the raised position by the tilt arrangement.

20. The method of claim 19, comprising pivoting the drive unit from the raised position by the tilt arrangement towards the lowered position, connecting the trim arrangement with the trim arrangement lock when the drive unit is pivoted to reach inside the range of trim angles, trimming the drive unit by the trim arrangement inside a range of trim angles while the trim arrangement is connected with the trim arrangement lock.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Examples are described in more detail below with reference to the appended drawings.

[0030] FIGS. 1a-1b are an exemplary of a propulsion system according to an example.

[0031] FIGS. 2a-2f show a sequence of trim and tilt of a drive unit according to an example.

[0032] FIGS. 3a-3g show a sequence of trim and tilt of a drive unit according to another example. FIG. 4 is an exemplary of a trim arrangement according to an example.

DETAILED DESCRIPTION

[0033] The detailed description set forth below provides information and examples of the disclosed technology with sufficient detail to enable those skilled in the art to practice the disclosure.

[0034] FIG. 1a is an exemplary of a propulsion system 1 for a marine vessel 100, according to an example. The propulsion system 1 comprises a transom bracket 2 configured to be connected to a transom 101 of the marine vessel 100. The propulsion system 1 also comprises a drive unit 3 being rotatably connected with the transom bracket 2 so as to be pivotable by a tilt arrangement 4 from a lowered position LP as shown in FIG. 1a into a raised position RP, or vice versa, about a pivot joint 6, and a trim arrangement 7 being arranged between the transom bracket 2 and the drive unit 3 to adjust a trim angle of the drive unit 3 when in the lowered position LP. The propulsion system 1 furthermore comprises a trim arrangement lock 8 being arranged to be connected with the trim arrangement 7 for a range of trim angles of the drive unit 3 in the lowered position LP so as to prevent pivoting of the drive unit 3 by the tilt arrangement 4 inside the range of trim angles, and the trim arrangement lock 8 is configured to be disconnected from the trim arrangement 7 outside the range of trim angles so as to allow pivoting of the drive unit 3 by the tilt arrangement 4. Hereby is obtained that that the drive unit 3 is positioned in the lowered position LP both while providing the forward thrust and the backward thrust since the trim arrangement lock prevents pivoting by tilt arrangement in the lowered position, for a predetermined range of trim angles, so that the tilt arrangement is configured to follow the rotation of the drive unit within the range of trim angles. In addition, since the trim arrangement 7 is dedicated to the trim function of the drive unit 3 less power is necessary for tilt arrangement 4, and thereby the tilt arrangement 4 may be smaller in size compared to the known solutions.

[0035] In addition, the drive unit 3 may comprises one or more propellers. The one or more propellers may be configured to push the marine vessel 100 in a forward motion of the marine vessel, or the one or more propellers may be configured to pull the marine vessel 100 in a forward motion of the marine vessel. The one or more propellers may provide the thrust.

[0036] In the example shown in FIG. 1a, the drive unit 3 comprises a first propeller 13a and a second propeller 13b. The first propeller 13a may be arranged to be counter-rotating compared to the second propeller 13b.

[0037] The drive unit 3 may comprise an electric motor for powering the one or more propellers. In another example, a combustion engine may be arranged.

[0038] In an example, the drive unit may comprise a water jet as thrust.

[0039] In FIG. 1b, the trim arrangement 7 has trimmed the drive unit 3 outside the predetermined range of trim angles whereby the trim arrangement lock 8 is arranged to be disconnected from the trim arrangement 7. Hereby, the drive unit 3 may be further rotated about the pivot joint 6 by the tilt arrangement. In the example shown in FIG. 1b, the trim arrangement lock 8 is arranged on the drive unit 3. In another example, the trim arrangement lock 8 may be arranged at the transom bracket.

[0040] In the example, the trim arrangement 7 comprises at least one linear trim actuator 7. In the example the linear trim actuator 7 may have a connection part 10 arranged at an end of the linear trim actuator 7. The connection part 7 may be arranged in the end opposite the transom bracket 2. In another example, the connection part may be arranged at the end opposite the drive unit 2.

[0041] An opposite end of the linear trim actuator 7 compared to the connection part 10 is connected to the transom bracket 2, or the drive unit.

[0042] The trim arrangement lock 8 and the connection part 10 are geometrically engaged inside the range of trim angles and are disengaged outside the range of trim angles. In FIG. 1a, the trim arrangement lock 8 and the connection part 10 are geometrically engaged inside the range of trim angles. In FIG. 1b, the trim arrangement lock 8 and the connection part 10 are disengaged outside the range of trim angles.

[0043] The trim arrangement lock 8 is configured to be moved along a trajectory of a rotation radius having the pivot joint 6 as a centre. The tilt arrangement 4 is configured to follow the rotation of the drive unit 3 inside the range of trim angles. According to the disclosure, the trim arrangement lock or the trim arrangement is configured to follow the drive unit 3 when it is pivoted inside the range of trim angles, and the trim arrangement lock is configured to be connected with the connecting part inside the range of trim angles. When the drive unit is pivoted outside the range of trim angles, the trim arrangement lock is disconnected from the connecting part and thereby the drive unit may be tilted to the raised position by the tilt arrangement further long the trajectory. The combination of the trim arrangement lock and the movement of either the trim arrangement lock or the trim arrangement ensures that the connection between the trim arrangement lock and the trim arrangement is obtained automatically within the range of trim angles and that the disconnection is obtained automatically outside the range of trim angles. This is obtained by a geometrically relationship between trim arrangement lock and the trim arrangement. Furthermore, no additional locking parts are necessary for locking and maintaining the trim arrangement lock to the trim arrangement.

[0044] In the example shown in FIGS. 1a-1b, the opposite end of the linear trim actuator 7 is securely fastened to the transom bracket 2. In another example, the opposite end of the linear trim actuator 7 is securely fastened to the drive unit. In addition, the opposite end of the linear trim actuator 7 projects from either the transom bracket 2 or the drive unit 3 in a fixed angle. Hereby is obtained that the trim arrangement lock and the trim arrangement may geometrically engage without the need for any additional components.

[0045] In FIGS. 2a-2f, a sequence of trim and tilt of a drive unit 3 according to an example is shown. The example shown corresponds to the example shown in FIGS. 1a-1b. In FIG. 2a, the drive unit 3 is in the lowered position LP, wherein the trim arrangement 7 is trimming the drive unit 3 to be in a neutral trim angle. The trim arrangement 7 is trimming the drive unit 3 about the pivot joint 6. The connection part 10 of the trim arrangement 7 is geometrically engaged with the trim arrangement lock 8 inside the range of trim angles. In FIG. 2b, the drive unit 3 is still in the lowered position LP, wherein the trim arrangement 7 is trimming the drive unit 3 to be in a negative trim angle. The trim arrangement 7 is trimming the drive unit 3 about the pivot joint 6 by rotating the drive unit 3 in the rotation direction shown in FIG. 2b. The linear actuator 7 is pulling the drive unit 3 towards the transom bracket 2 whereby the drive unit is being trimmed to the negative trim angle. The connection part 10 of the trim arrangement 7 is geometrically is still engaged with the trim arrangement lock 8 inside the range of trim angles.

[0046] Compared to FIG. 2b, the drive unit 3 in FIG. 2c is trimmed to a positive trim angle by the trim arrangement 7. The drive unit 3 is still in the lowered position LP. The trim arrangement 7 is trimming the drive unit 3 about the pivot joint 6 by rotating the drive unit 3 in the rotation direction shown in FIG. 2c. The linear actuator 7 is pushing the drive unit 3 away the transom bracket 2 whereby the drive unit is being trimmed to the positive trim angle. The connection part 10 of the trim arrangement 7 is geometrically is still engaged with the trim arrangement lock 8 inside the range of trim angles.

[0047] Compared to FIG. 2c, the drive unit 3 in FIG. 2d is trimmed to a higher positive trim angle by the trim arrangement 7. The drive unit 3 is still in the lowered position LP. The trim arrangement 7 is trimming the drive unit 3 about the pivot joint 6 by further rotating the drive unit 3 in the rotation direction shown in FIG. 2d. The linear actuator 7 is pushing the drive unit 3 further away the transom bracket 2 whereby the drive unit is being trimmed to the positive trim angle about the pivot joint 6. The connection part 10 of the trim arrangement 7 is geometrically is still engaged with the trim arrangement lock 8 inside the range of trim angles.

[0048] In FIGS. 2e-2f, the drive unit 3 is outside the range of trim angles. The connecting part 10 of the linear actuator 7 is being disengaged from the trim arrangement lock 8 in FIG. 2e, whereby the linear actuator 7 is not trimming the drive unit 3. The tilt arrangement 4 is configured to rotate the drive unit 3 further about the pivot joint 6 in the direction shown in FIG. 2e. In FIG. 2f, the drive unit 3 has been tilted further up towards the raised position RP by the tilt arrangement 4 is rotating the drive unit 3 further about the pivot joint 6. The tilt arrangement and trim arrangement are configured to function together, however, are separate arrangements.

[0049] The tilt arrangement 4 is configured to follow the rotation of the drive unit 3 inside the range of trim angles as shown in FIGS. 2a-2d, and to tilt the drive unit 3 outside the range of trim angles as shown in FIGS. 2e-2f.

[0050] The tilt arrangement 4 comprises a linear tilt actuator 4 and/or a rotation motor. In the example of FIGS. 1a-2f, the tilt arrangement is a linear tilt actuator 4. The linear tilt actuator 4 may be a hydraulic cylinder, or it may be a pneumatic cylinder. The rotation motor may be electric.

[0051] In FIGS. 3a-2g, another sequence of trim and tilt of a drive unit 3 according to an example is shown. In FIG. 3a, the drive unit 3 is in the lowered position LP, wherein the trim arrangement 7 is trimming the drive unit 3 to be in a neutral trim angle. The trim arrangement 7 is trimming the drive unit 3. The connection part 10 of the trim arrangement 7 is geometrically engaged with the trim arrangement lock 8 inside the range of trim angles. In the example, the connection part 10 is a slot or recess arranged in an end of the trim arrangement 7 and the trim arrangement lock 8 is a projection arranged on the drive unit 3. In FIG. 3b, the drive unit 3 is still in the lowered position LP, wherein the trim arrangement 7 is trimming the drive unit 3 to be in a negative trim angle. The trim arrangement 7 is trimming the drive unit 3 about the pivot joint. The linear actuator 7 is pulling the drive unit 3 towards the transom bracket 2 whereby the drive unit is being trimmed to the negative trim angle. The connection part 10 of the trim arrangement 7 is geometrically still engaged with the trim arrangement lock 8 inside the range of trim angles.

[0052] Compared to FIG. 3b, the drive unit 3 in FIG. 3c is trimmed to a positive trim angle by the trim arrangement 7. The drive unit 3 is still in the lowered position LP. The trim arrangement 7 is trimming the drive unit 3 about the pivot joint. The linear actuator 7 is pushing the drive unit 3 away the transom bracket 2 whereby the drive unit 3 is being trimmed to the positive trim angle. The connection part 10 of the trim arrangement 7 is geometrically is still engaged with the trim arrangement lock 8 inside the range of trim angles.

[0053] Compared to FIG. 3c, the drive unit 3 in FIG. 3d is trimmed to a higher positive trim angle by the trim arrangement 7. The drive unit 3 is still in the lowered position LP. The trim arrangement 7 is trimming the drive unit 3 about the pivot joint. The linear actuator 7 is pushing the drive unit 3 further away the transom bracket 2 whereby the drive unit is being trimmed to the positive trim angle about the pivot joint 6. The connection part 10 of the trim arrangement 7 is geometrically still engaged with the trim arrangement lock 8 inside the range of trim angles but the drive unit 3 is in FIG. 3d very close to be outside the range of trim angles whereby the connection part 10 and the trim arrangement lock 8 are disengaged.

[0054] In FIGS. 3e-3g, the drive unit 3 is outside the range of trim angles. The connecting part 10 of the linear actuator 7 is being disengaged from the trim arrangement lock 8 in FIG. 3e, whereby the linear actuator 7 is not trimming the drive unit 3. The tilt arrangement is configured to rotate the drive unit 3 further about the pivot joint. In FIG. 2f, the drive unit 3 has been tilted further up towards the raised position RP by the tilt arrangement is rotating the drive unit 3 further about the pivot joint. In the example the trim arrangement 7 has been retracted towards the transom bracket 2. In FIG. 3g, the drive unit 3 is in the raised position RP.

[0055] The trim arrangement lock 8 is configured to receive the connection part 10 or the connection part 10 is configured to receive the trim arrangement lock 8 inside the range of trim angles and otherwise being disengaged. In addition, the trim arrangement lock 8 may be configured to receive the connection part 10 of the linear trim actuator 7 or is configured to engage the connection part 10.

[0056] The trim arrangement lock 8 may comprise a receptacle, a slot, a recess, a bended member, a U-formed member, an inverted U-formed member, a helically or spirally formed member, or similar, when being configured to receive the connecting part 10.

[0057] The trim arrangement lock 8 may have an inlet through which the connecting part 10 can enter or leave outside the range of trim angles and a face being configured to maintain the connection part 10 in the trim arrangement lock 8 inside the range of trim angles. The inlet may taper so as assisting the connecting part 10 in enter and leaving the trim arrangement lock 8.

[0058] Moreover, the connecting part 10 may comprise a geometrical shape configured to engage the trim arrangement lock 8, such as a projection, a spherical member, a knob, a recess, a slot or similar. The trim arrangement lock 8 may comprise a projection, a spherical member, a knob, or similar when being configured to engage the connecting part.

[0059] Furthermore, the trim arrangement lock 8 may be made of a rigid material, such as metal.

[0060] In FIG. 4, the trim arrangement 7 is spiral-formed and comprises a rotatory actuator or motor 15. The rotatory motor 15 is configured to rotate the spiral-formed trim arrangement 7 in both directions so as the drive unit may be trimmed within the range of trim angles. The trim arrangement 7 also comprises a spiral-formed track 16. In the example, the trim arrangement lock 8 is configured to be guided in the spiral-formed track 16 within the range of trim angels and thereby being connected with the trim arrangement. The trim arrangement 7 is arranged on the transom bracket and the trim arrangement lock 8 is arranged on the drive unit 3. As the drive unit 3 is being pivoted outside the range of the trim angles the trim arrangement lock 8 is moved out spiral-formed track 16 and thereby disconnected so that the drive unit 3 may be tilted. In another example, the spiral-formed trim arrangement 7 may be arranged on the drive unit 3 and the trim arrangement lock 8 is arranged on the transom bracket.

[0061] In addition, the trim arrangement 7 may comprise a plurality of linear trim actuators or rotatory trim actuators and a corresponding number of trim arrangement locks.

[0062] In another example, the propulsion system may comprise a kick up function.

[0063] The present disclosure also relates to a marine vessel 100 comprising a transom and a propulsion system 1 as described above.

[0064] The present disclosure also relates to a method for trimming and tilting a drive unit 3 of a propulsion system 1, comprising [0065] arranging a propulsion system 1 as describe above on a marine vessel 100, [0066] arranging the drive unit 3 in the lowered position LP, [0067] trimming the drive unit 3 by the trim arrangement 7 inside a range of trim angles while the trim arrangement 7 is connected with the trim arrangement lock 8, [0068] pivoting the drive unit 3 outside the range of trim angles so that the trim arrangement 7 is disconnected from the trim arrangement lock 8, [0069] tilting the drive unit 3 to the raised position by the tilt arrangement 4.

[0070] In addition, the method may further comprising [0071] pivoting the drive unit 3 from the raised position RP by the tilt arrangement towards the lowered position LP, [0072] connecting the trim arrangement 7 with the trim arrangement lock 8 when the drive unit 3 is pivoted to reach inside the range of trim angles, [0073] trimming the drive unit 3 by the trim arrangement 7 inside a range of trim angles while the trim arrangement 7 is connected with the trim arrangement lock 8.

[0074] Certain aspects and variants of the disclosure are set forth in the following examples numbered consecutive below.

[0075] Example 1: A propulsion system (1) for a marine vessel (100), comprising [0076] a transom bracket (2) configured to be connected to a transom of the marine vessel, [0077] a drive unit (3) being rotatably connected with the transom bracket (2) so as to be pivotable by a tilt arrangement (4) from a lowered position (LP) into a raised position (RP), or vice versa, about a pivot joint (6), and [0078] a trim arrangement (7) being arranged between the transom bracket (2) and the drive unit (3) to adjust a trim angle of the drive unit (3) when in the lowered position (LP), further comprising a trim arrangement lock (8) being arranged to be connected with the trim arrangement (7) for a range of trim angles of the drive unit (3) in the lowered position so as to prevent pivoting of the drive unit (3) by the tilt arrangement (4) inside the range of trim angles, and the trim arrangement lock (8) is arranged to be disconnected from the trim arrangement (8) outside the range of trim angles so as to allow pivoting of the drive unit (3) by the tilt arrangement (4).

[0079] Example 2: The propulsion system (1) of example 1, wherein the trim arrangement (7) comprises at least one linear trim actuator (7) or rotatory trim actuator, the trim actuator has a connection part (10) arranged at an end of the trim actuator.

[0080] Example 3: The propulsion system (1) of example 2, wherein the connection part (10) is arranged at the end opposite the drive unit.

[0081] Example 4: The propulsion system (1) of example 2, wherein the connection part (10) is arranged in the end opposite the transom bracket.

[0082] Example 5: The propulsion system (1) of any of the examples 2-4, wherein an opposite end of the trim actuator (7) compared to the connection part (10) is connected to the transom bracket or the drive unit.

[0083] Example 6: The propulsion system (1) of example 5, wherein the opposite end of the trim actuator (7) is securely fastened to either the transom bracket or the drive unit.

[0084] Example 7: The propulsion system (1) of example 6, wherein the opposite end of the trim actuator (7) projects from either the transom bracket or the drive unit in a fixed angle.

[0085] Example 8: The propulsion system (1) of any of the preceding examples, wherein trim arrangement lock (8) is arranged on the drive unit or at the transom bracket.

[0086] Example 9: The propulsion system (1) of example 8, wherein the trim arrangement lock (8) is securely arranged on the drive unit or on the transom bracket.

[0087] Example 10: The propulsion system (1) of any of examples 2-9, wherein the trim arrangement lock (8) is configured to receive the connection part (10) or the connection part (10) is configured to receive the trim arrangement lock inside the range of trim angles and otherwise being disengaged.

[0088] Example 11: The propulsion system (1) of example 10, wherein the trim arrangement lock (8) and the connection part (10) are geometrically engaged inside the range of trim angles and are disengaged outside the range of trim angles.

[0089] Example 12: The propulsion system (1) of any of the preceding examples, wherein the trim arrangement lock (8) or the trim arrangement is configured to be moved along a trajectory of a rotation radius having the pivot joint (6) as a centre.

[0090] Example 13: The propulsion system (1) of any of the preceding examples, wherein the tilt arrangement (4) is configured to follow the rotation of the drive unit (3) inside the range of trim angles.

[0091] Example 14: The propulsion system (1) of any of the preceding examples, wherein the trim arrangement (7) comprises a plurality of linear trim actuators (7) or a plurality of rotatory trim actuators, and a corresponding number of trim arrangement locks (8).

[0092] Example 15: The propulsion system (1) of any of the preceding examples, wherein the tilt arrangement (4) comprises a linear tilt actuator and/or a rotatory actuator or motor.

[0093] Example 16: The propulsion system (1) of any of the preceding examples, wherein the trim arrangement lock (8) is configured to receive the connection part (10) of the trim actuator or is configured to engage the connection part.

[0094] Example 17: The propulsion system (1) of example 16, wherein the trim arrangement lock (8) and the connection part (10) are geometrically connected and/or engaged inside the range of trim angles.

[0095] Example 18: The propulsion system (1) of example 16-17, wherein the trim arrangement lock (8) comprises a receptacle, a slot, a recess, a bended member, a U-formed member, an inverted U-formed member, a helically or spirally formed member, or similar, when being configured to receive the connecting part (10).

[0096] Example 19: The propulsion system (1) of example 18, wherein the trim arrangement lock (8) has an inlet through which the connecting part (10) can enter or leave outside the range of trim angles and a face being configured to maintain the connection part in the trim arrangement lock inside the range of trim angles.

[0097] Example 20: The propulsion system (1) of example 19, wherein the inlet tapers so as assisting the connecting part (10) in enter and leaving the trim arrangement lock (8).

[0098] Example 21: The propulsion system (1) of examples 18-20, wherein the connecting part (10) comprises a geometrical shape configured to engage the trim arrangement lock (8), such as a projection, a spherical member, a knob, or similar.

[0099] Example 22: The propulsion system (1) of example 16-17, wherein the trim arrangement lock (8) comprises a projection, a spherical member, a knob, or similar when being configured to engage the connecting part (10).

[0100] Example 23: The propulsion system (1) of example 22, wherein the connecting part (10) comprises a geometrical shape configured to receive the trim arrangement lock (8), such as a receptacle, a slot, a recess, a bended member, a U-formed member, an inverted U-formed member, a helically or spirally formed member, or similar.

[0101] Example 24: The propulsion system (1) of any of the preceding examples, wherein the trim arrangement lock (8) is made of a rigid material, such as metal.

[0102] Example 25: The propulsion system (1) of any of the preceding examples, wherein the drive unit (3) comprises an electric motor.

[0103] Example 26: The propulsion system (1) of any of the preceding examples, wherein the drive unit (3) is configured to be trimmed by the trim arrangement (7) and titled around the pivot joint (6) by the tilt arrangement (4).

[0104] Example 27: The propulsion system (1) of example 15, wherein the rotation motor is electric, or the linear tilt actuator (4) is a hydraulic cylinder or a pneumatic cylinder.

[0105] Example 28: The propulsion system (1) of example 2, wherein the linear trim actuator (7) is a hydraulic cylinder or a pneumatic cylinder.

[0106] Example 29: The propulsion system (1) of any of the preceding examples, wherein the drive unit (3) comprises one or more propellers.

[0107] Example 30: The propulsion system (1) of example 29, wherein the one or more propellers are configured to push the marine vessel (100) in a forward motion of the marine vessel.

[0108] Example 31: The propulsion system (1) of example 29, wherein the one or more propellers are configured to pull the marine vessel (100) in a forward motion of the marine vessel.

[0109] Example 32: The propulsion system (1) of example 29, wherein the drive unit (3) comprises a first propeller (13a) and a second propeller (13b).

[0110] Example 33: The propulsion system (1) of example 32, wherein the first propeller (13a) is arranged to be counter-rotating compared to the second propeller (13b).

[0111] Example 34: The propulsion system (1) of any of the preceding examples, further comprising a control unit configured to control the trim arrangement (7) and/or the tilt arrangement (4).

[0112] Example 35: The propulsion system (1) of any of the preceding examples, further comprising a kick up function.

[0113] Example 36: The propulsion system (1) of example 1, wherein the trim arrangement (7) comprises a spiral-formed track (16) and a rotatory motor (15) configured to rotate the spiral-formed track (16).

[0114] Example 37: The propulsion system (1) of example 36, wherein the trim arrangement lock (8) is configured to the guided in the spiral-formed track (16) within the range of trim angles.

[0115] Example 38: A marine vessel (100) comprising a transom and a propulsion system (1) of any of the preceding examples.

[0116] Example 39: A method for trimming and tilting a drive unit (3) of a propulsion system (1), comprising [0117] arranging a propulsion system (1) of any of the examples 1-37 on a marine vessel (100) of example 38, [0118] arranging the drive unit (3) in the lowered position (LP), [0119] trimming the drive unit (3) by the trim arrangement (7) inside a range of trim angles while the trim arrangement (7) is connected with the trim arrangement lock (8), [0120] pivoting the drive unit (3) outside the range of trim angles so that the trim arrangement (7) is disconnected from the trim arrangement lock (8), [0121] tilting the drive unit (3) to the raised position by the tilt arrangement (4).

[0122] Example 40: A method of example 39, comprising [0123] pivoting the drive unit (3) from the raised position (RP) by the tilt arrangement (4) towards the lowered position (LP), [0124] connecting the trim arrangement (7) with the trim arrangement lock (8) when the drive unit (3) is pivoted to reach inside the range of trim angles, [0125] trimming the drive unit (3) by the trim arrangement (7) inside a range of trim angles while the trim arrangement (7) is connected with the trim arrangement lock (8).

[0126] The terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms a, an, and the are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term and/or includes any and all combinations of one or more of the associated listed items. It will be further understood that the terms comprises, comprising, includes, and/or including when used herein specify the presence of stated features, integers, actions, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, actions, steps, operations, elements, components, and/or groups thereof.

[0127] It will be understood that, although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present disclosure.

[0128] Relative terms such as below or above or upper or lower or horizontal or vertical may be used herein to describe a relationship of one element to another element as illustrated in the Figures. It will be understood that these terms and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. It will be understood that when an element is referred to as being connected or coupled to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being directly connected or directly coupled to another element, there are no intervening elements present.

[0129] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0130] It is to be understood that the present disclosure is not limited to the aspects described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the present disclosure and appended claims. In the drawings and specification, there have been disclosed aspects for purposes of illustration only and not for purposes of limitation, the scope of the disclosure being set forth in the following claims.