A continuous variable valve opening duration controlling apparatus may include a camshaft mounted to a cylinder head, a plurality of wheels mounted to the camshaft, of which a wheel key is formed respectively, and disposed on each cylinder, a plurality of ...

A method for improving performance of a system that controls a intermediate lock position continuously variable valve may include: obtaining a cam position using an engine Electronic Control Unit (ECU) that has started controlling a position of a intermedi...

The invention relates to a device for camshaft adjustment of an internal combustion engine with a camshaft having at least one cam piece arranged in a rotationally fixed manner thereon and an axial slot with two slot paths. The slot paths are each formed i...

A rocker arm comprises a first roller for engaging a first rotatable cam surface whereby at least part of the rocker arm can be pivoted by at least the first rotatable cam surface to move a valve to cause a first valve event, and a further roller for engag...

In an engine equipped with a variable valvetrain including a second cam phase alteration mechanism 31 for altering the phase of second intake cams 12 actuating second intake valves, relative to a crankshaft, the second cam phase alteration mechanism 31 is ...

To provide an electromagnetic-clutch rotation stopping structure for use with a phase varying apparatus of an automobile engine, having a shorter axial length than similar conventional rotation stopping structures. MEANS FOR ACHIEVING THE OBJECT An electro...

The present invention comprises a cylinder block wherein vertical reciprocation of a piston is transmitted to a connecting rod then rotates a crank shaft to generate torque. A cylinder head is joined to the top of the cylinder block, whereof one side is co...

This camshaft bearing arrangement has the engine cylinder head (10) with its end walls (14,16) provided with integrated cam shaft bearing halves (42,44). The corresponding upper bearing halves (46,48) are integrated into the end walls (26,28) of the valve ...