The invention relates to a reciprocating-piston machine, comprising a valve actuation device for at least one gas exchange valve, at least one valve stroke transmission device, which has at least one valve stroke transmission element, which is arranged between the gas exchange valve and the camshaft and which is mounted for movement between a first Position associated with a closed Position of the gas exchange valve and a second Position associated with an open position of the gas exchange valve, at least one halting device having a halting element mounted for movement between an actuation position and a release position in a machine housing or a housing-fixed component parallel to a guiding surface of the first valve stroke transmission element that the halting element at least shows the displacement motion of the first valve stroke transmission element and releases said displacement motion in the release position.

A variable valve driving mechanism of an engine includes a rocker arm configured to control open and close of a valve and a servo rocker arm arranged in parallel to the rocker arm. A swing end of the servo rocker arm extends to the top of the swing end of the rocker arm. A valve adjustment gap provided in the swing direction of the servo rocker arm and the rocker arm is formed between the servo rocker arm and the rocker arm. A gap compensating device telescopically filling the valve adjustment gap and configured to adjust the valve to be delayed to close or open in advance when extending to the valve adjustment gap is provided between the servo rocker arm and the rocker arm.

A method of controlling an operation of an inlet valve system arranged in connection with each cylinder of an internal combustion piston engine, includes monitoring at least one parameter relating to engine load conditions, controlling using a primary control procedure an opening and closing timing of an inlet valve in response to the at least one parameter, and feeding charge air into the cylinder when the inlet valve is open. In a secondary control procedure a parameter relating to engine load conditions is measured and the closing timing of the inlet valve of the inlet valve system is controlled in response to the at least parameter independently from and with higher priority than the primary control procedure.

The disclosure relates to a valve train for an internal combustion engine and to an internal combustion engine. The valve train has an inlet valve actuation mechanism for the periodic actuation of an inlet valve of the internal combustion engine. The valve train also has a delay element, which is in contact with the inlet valve actuation mechanism and which has a hydraulic chamber for delaying a closing movement of the inlet valve by means of a hydraulic medium. The valve train has a hydraulic feed for feeding the hydraulic medium into the hydraulic chamber, the hydraulic feed having a control shaft, and the control shaft being mechanically driven by the internal combustion engine. The control shaft has an axially extended cavity for the hydraulic medium, and at least one opening for intermittently feeding the hydraulic medium from the cavity to the hydraulic chamber.

A variable valve driving mechanism of an engine, and the engine. The variable valve driving mechanism comprises a rocker arm (1) configured to control open and close of a valve (7) and a servo rocker arm (2) arranged in parallel to the rocker arm (1). A swing end of the servo rocker arm (2) extends to the top of the swing end of the rocker arm (1). A valve adjustment gap (1-2) provided in the swing direction of the servo rocker arm (2) and the rocker arm (1) is formed between the servo rocker arm (2) and the rocker arm (1). A gap compensating device telescopically filling the valve adjustment gap (1-2) and configured to adjust the valve (7) to be delayed to close or open in advance when extending to the valve adjustment gap (1-2) is provided between the servo rocker arm (2) and the rocker arm (1). When the valve (7) is open or closed normally, the gap compensating device is contracted, and the rocker arm (1) is not in contact with the servo rocker arm (2) in the swing process by means of the valve adjustment gap (1-2). When it is required to control the valve (7) to be delayed to close or open in advance, the gap compensating device extends into the valve adjustment gap (1-2) to eliminate the gap, and the open/close time of the valve (7) is adjusted to avoid the problem that the valve is not properly closed caused by a plurality of oil control paths.

A rocker arm assembly for use in a valve train carrier, the rocker arm assembly being rotatable around a rocker shaft supported by the valve train carrier based upon a lift profile provided on a cam that rotates with a camshaft, a rotation of the rocker arm assembly causing translation of a corresponding engine valve, includes: a rocker arm body having an opening that receives the rocker shaft, the rocker arm body further defining an oil supply channel; a capsule assembly disposed on the rocker arm body and that selectively communicates oil to and from the oil supply channel, the capsule assembly including: a plunger assembly having a plunger that selectively translates within a plunger chamber between an extended rigid position based upon the plunger chamber being pressurized with oil and a retracted non-rigid position based upon the plunger chamber being depressurized, the plunger moving move the engine valve.

A continuous variable valve duration apparatus may include first cam portion including first cam, of which relative phase angle of the first cam is variable, internal bracket transmitting rotation of the camshaft to the first cam portion, control shaft, of which a control gear is mounted thereto, slider housing in which the internal bracket is rotatably inserted, to be movable perpendicular to the camshaft and the slider housing on which a guide wall is formed, rocker shaft, first rocker arm rotatably disposed to the rocker shaft of which a first end portion contacts with the first cam and of which a second end portion is connected to a first valve, moving gear disposed within the guide wall, engaged with the control gear and the moving gear to move the slider housing according to rotation of the control shaft and a controller selectively rotating the control shaft.

A continuous variable valve duration apparatus may include first cam portion including first cam, of which relative phase angle of the first cam is variable, internal bracket transmitting rotation of the camshaft to the first cam portion, control shaft, of which a control gear is mounted thereto, slider housing in which the internal bracket is rotatably inserted, to be movable perpendicular to the camshaft and the slider housing on which a guide wall is formed, rocker shaft, first rocker arm rotatably disposed to the rocker shaft of which a first end portion contacts with the first cam and of which a second end portion is connected to a first valve, moving gear disposed within the guide wall, engaged with the control gear and the moving gear to move the slider housing according to rotation of the control shaft and a controller selectively rotating the control shaft.

A method of controlling an operation of an inlet valve system arranged in connection with each cylinder of an internal combustion piston engine, includes monitoring at least one parameter relating to engine load conditions, controlling using a primary control procedure an opening and closing timing of an inlet valve in response to the at least one parameter, and feeding charge air into the cylinder when the inlet valve is open. In a secondary control procedure a parameter relating to engine load conditions is measured and the closing timing of the inlet valve of the inlet valve system is controlled in response to the at least parameter independently from and with higher priority than the primary control procedure.

The invention relates to a reciprocating-piston machine, comprising a valve actuation device for at least one gas exchange valve, at least one valve stroke transmission device, which has at least one valve stroke transmission element, which is arranged between the gas exchange valve and the camshaft and which is mounted for movement between a first Position associated with a closed Position of the gas exchange valve and a second Position associated with an open position of the gas exchange valve, at least one halting device having a halting element mounted for movement between an actuation position and a release position in a machine housing or a housing-fixed component parallel to a guiding surface of the first valve stroke transmission element that the halting element at least shows the displacement motion of the first valve stroke transmission element and releases said displacement motion in the release position.