A fuel injection control device includes an additional energization unit. Concerning an undershoot state caused by a first energization for fuel injection, a return period is an estimated period required for a movable core to return to an initial position from a first energization. An injection interval ranges from the first energization to a second energization that is for a next fuel injection. An allowable period is obtained by subtracting a rise period estimated for the second energization from the return period. The additional energization unit adds an additional energization between the first energization and the second energization when the injection interval is longer than or equal to the allowable period and is shorter than or equal to the return period.

Linear actuators are disclosed. The linear actuator comprises a thruster and a stator. The thruster includes a thruster winding, and the stator includes a stator winding. The stator is disposed about the thruster. The linear actuator also includes a sheath disposed about the stator and the thruster. The thruster is configured to translate within the sheath relative to the stator upon application of an electrical current to the stator winding, the thruster winding, or a combination thereof. The stator winding and the thruster winding each comprise a nonpermanent magnet.

A valvetrain assembly comprising a first body and a second body, wherein the second body comprises a first wall and a second wall. The valvetrain assembly further comprises a first latch pin, wherein the first latch pin is configured to latch the second body to the first body and unlatch the second body from the first body. A portion of the first latch pin is located between the first wall and the second wall. The valvetrain assembly also comprises a movable shaft, wherein the movable shaft is configured to move the first latch pin. The valvetrain assembly comprises an electromagnet, wherein the electromagnet is configured to move the movable shaft.

A valvetrain assembly comprising a first body and a second body, wherein the second body comprises a first wall and a second wall. The valvetrain assembly further comprises a first latch pin, wherein the first latch pin is configured to latch the second body to the first body and unlatch the second body from the first body. A portion of the first latch pin is located between the first wall and the second wall. The valvetrain assembly also comprises a movable shaft, wherein the movable shaft is configured to move the first latch pin. The valvetrain assembly comprises an electromagnet, wherein the electromagnet is configured to move the movable shaft.

Systems, methods, and control systems for a switching rocker arm assembly are disclosed. A switching rocker arm (10) engages a valve (29), the switching rocker arm (10) is movable by contact with a cam (60) having a lift portion (59) and a base circle (58). The switching rocker arm (10) comprises an inner arm (20), an outer arm (12) pivotably secured to the inner arm (20) and having a latch bore, and a latch pin (28) selectively movable between a first position where the latch pin (28) does not contact the inner arm (20), and a second position wherein the latch pin (28) contacts the inner arm (20). A solenoid assembly (500) is energized while the rocker arm is in contact with the lift portion (59) of the cam. The solenoid assembly is direct-acting and overhead and is calibratable with respect to the rocker arm.

Systems, methods, and control systems for a switching rocker arm assembly are disclosed. A switching rocker arm (10) engages a valve (29), the switching rocker arm (10) is movable by contact with a cam (60) having a lift portion (59) and a base circle (58). The switching rocker arm (10) comprises an inner arm (20), an outer arm (12) pivotably secured to the inner arm (20) and having a latch bore, and a latch pin (28) selectively movable between a first position where the latch pin (28) does not contact the inner arm (20), and a second position wherein the latch pin (28) contacts the inner arm (20). A solenoid assembly (500) is energized while the rocker arm is in contact with the lift portion (59) of the cam. The solenoid assembly is direct-acting and overhead and is calibratable with respect to the rocker arm.

A stator assembly for receiving at least two rotors. The assembly comprises at least two individual stators which are divided into stator segments, with at least one segment being a shared segment which forms part of at least two adjacent individual stators. An engine valve actuation assembly includes a stator assembly comprising at least two individual stators. Each individual stator comprises a peripheral portion extending around the longitudinal axis of the stator, with part of the peripheral portion of each stator forming part of the peripheral portion of an adjacent individual stator. Methods for assembling a stator assembly are also described.

An electromagnetic linear motor is described. It comprises a tubular stator (1) having a longitudinal axis (W); and a permanently magnet (7) with poles oriented along the axis and linearly movable along said axis inside the stator (1). The stator (1) comprises at least two columns (A, B) formed by electromagnets (2), each electromagnet (2) comprising a core (U) formed by a central straight segment (4) and two end polar expansions (5) all being oriented towards theand orthogonally tosaid axis (W), The columns are circularly arranged around said the permanent magnet (7), and mutually linearly offset along said axis.

A valvetrain assembly comprising a first body and a second body, wherein the second body comprises a first wall and a second wall. The valvetrain assembly further comprises a first latch pin, wherein the first latch pin is configured to latch the second body to the first body and unlatch the second body from the first body. A portion of the first latch pin is located between the first wall and the second wall. The valvetrain assembly also comprises a movable shaft, wherein the movable shaft is configured to move the first latch pin. The valvetrain assembly comprises an electromagnet, wherein the electromagnet is configured to move the movable shaft.

A valvetrain assembly comprising a first body and a second body, wherein the second body comprises a first wall and a second wall. The valvetrain assembly further comprises a first latch pin, wherein the first latch pin is configured to latch the second body to the first body and unlatch the second body from the first body. A portion of the first latch pin is located between the first wall and the second wall. The valvetrain assembly also comprises a movable shaft, wherein the movable shaft is configured to move the first latch pin. The valvetrain assembly comprises an electromagnet, wherein the electromagnet is configured to move the movable shaft.