Patent ID: 9494059
Filing Date: 2016-11-15
CPC Classification: F01L

Claim Text:
1. A valve train layout structure comprising: a non-control camshaft connected to a chain sprocket rotating in line with engine timing and adapted to not vary opening/closing timing of a valve; a control camshaft including an outer shaft, a first cam fixed to the outer shaft, an inner shaft rotatably inserted in the outer shaft, and a second cam fixed to the inner shaft and adapted to vary opening/closing timing of at least one of a valve activated by the first cam and a valve activated by the second cam by varying a phase between the first cam and the second cam; a cam phaser including a rotor and a stator relatively rotatable with respect to each other, wherein one of the rotor or the stator is operatively connected to the outer shaft and the other of the rotor or the stator is operatively connected to the inner shaft such that the cam phaser varies the phase between the first cam and the second cam; and a return spring, wherein the rotor is driven in line with the engine timing and the stator is relatively rotatable with respect to the rotor, and wherein the return spring is mounted in a space between the first driving gear and the second driving gear constituting a first pair or a space between the first driven gear and the second driven gear constituting a second pair.