A Type II valvetrain and engine brake arrangement includes a hydraulic brake housing mountable to a valve block of the engine. A brake piston is coupled to a brake rod and a brake cam lobe and is movable between an activated position and a non-activated position. A finger follower is disposed relative to the brake housing so that the brake rod engages the finger follower at least when the brake piston is in the activated position. When the brake piston is in a non-activated position, the finger follower is configured to pivot about a pivot as the finger follower follows a valve cam lobe to effect lifting and seating of a cylinder valve of an engine cylinder. When the brake piston is in the activated position, the finger follower, at least in part, pivots from about the pivot and the brake rod engages an end of the finger follower to lift the cylinder valve and release compression from the engine cylinder.

The present invention refers to a charge changing control device for a reciprocating engine, comprising at least one cam follower configured for being pivotably actuated around a pivot axis (P) upon rotational movement of a camshaft, and an adjustment unit configured for setting at least three different charge-changing modes of the device by translationally displacing the pivot axis relative (P) to a rotational axis (R) of the camshaft.

Internal combustion engine having cam actuated valves that can be controlled to facilitate the use of different air charge levels in different cylinders or sets of cylinders are described. In one aspect a first set of cylinders is operated in a skip fire manner in which the corresponding cylinders are deactivated during skipped working cycles. Cam actuated intake valves associated with a second set of cylinders are operated differently so that the air charge in the cylinders in the second set is different than the air charge in fired cylinders subject to the skip fire control. According to another aspect, an engine having cam actuated intake valves is operated in a dynamic firing level modulation mode. During the dynamic firing level modulation operation, the cam actuated intake valves are controlled in at least two different manners to such that different cylinder working cycles have different air charges.

A continuous variable valve duration apparatus is provided. The apparatus includes a camshaft and a cam unit on which a cam is formed. The camshaft is inserted into the cam unit. An inner wheel transmits rotation of the camshaft to the cam unit. The inner wheel is rotatably inserted in a wheel housing a housing hinge aperture parallel to the camshaft is formed on the wheel housing. A slider hinge aperture and a slider control aperture parallel to the camshaft are formed through a slider. A hinge shaft is inserted into the housing hinge aperture and the slider hinge aperture. An eccentric cam is formed on a control shaft and is inserted into the slider control aperture. A controller selectively rotates the control shaft to move the wheel housing perpendicular to the camshaft via the slider.

A continuously variable valve lift apparatus may include a camshaft, a cam portion on which two cams are formed and on which a rotation member is formed between the cams, a slider housing into which the rotation member is rotatably inserted, and rotatable around a pivot shaft, a control portion configured to selectively change a position of the slider housing, an output portion contacting the cams, rotatable around the pivot shaft and on which a valve shoe is formed, and a valve device configured to be driven by the valve shoe.

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 control method for a continuously variable valve lift mechanism includes: controlling a continuously variable valve lift mechanism to enter a limp mode when the continuously variable valve lift mechanism fails and disables an automatic valve lift changing function; driving and forcing the continuously variable valve lift mechanism to move to a maximum lift position; and triggering a self locking function to self lock the continuously variable valve lift mechanism at the maximum lift position when the continuously variable valve lift mechanism reaches the maximum lift position. A control system for a continuously variable valve lift mechanism, and a vehicle are also provided.

A continuous variable valve duration system may include a camshaft, a first cam portion including a first cam, of which the camshaft is inserted therein, an internal bracket transmitting rotation of the camshaft to the first cam portion, a control shaft parallel to the camshaft, a slider housing in which the internal bracket is rotatably inserted, on which a control groove where the control shaft is inserted into is formed, and the slider housing movable vertical to the camshaft, a guider configured for guiding movement of the slider housing, a rocker shaft, a 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 and a control portion selectively rotating the control shaft for changing a position of the slider housing.

A continuous variable valve duration system may include a camshaft, a first cam portion including a first cam, into which the camshaft is inserted and of which a relative phase angle of the first cam with respect to the camshaft is variable, a rocker shaft disposed parallel to the camshaft, a first rocker arm rotatably disposed to the rocker shaft of which a first end contacts with the first cam and a second end is connected to a first valve, an inner bracket to transmit rotation of the camshaft to the first cam portion, a slider housing into which the inner bracket is rotatably inserted, on which a control hole is formed and on which a guide portion is formed for guiding movement of the slider housing, an eccentric shaft inserted into the control hole, and a control portion to selectively rotate the eccentric 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.