A camshaft phaser comprising an advance one-way clutch and a retard one-way clutch. The camshaft phaser comprises an input component arranged to receive torque from an engine, an advance inner ring, a plurality of rollers circumferentially arranged around the advance inner ring, an advance outer ring radially disposed between the input component and the advance inner ring, and an actuation assembly arranged to be disposed within a camshaft, the actuation assembly comprises advance locking pin assemblies arranged in advance channels and an actuator rod. For an advanced mode, the actuator rod is arranged to radially displace advance locking pin assemblies to non-rotatably connect the camshaft and advance inner ring, the rollers ride up ramps on advance outer ring, which expands radially to engage the input component. The retard clutch is substantially similar, and arranged diametrically opposed, to the advance clutch.

A variable valve actuation device for an engine includes a rocker arm mechanism, a camshaft, an actuation mechanism and a blocking mechanism. The rocker arm roller can slide on a roller shaft so as to have two operating positions, a first cam and a second cam which are adjacent are provided on the camshaft, the rocker arm mechanism is actuated, based on the different operating positions of the rocker arm roller, by the first cam or the second cam, respectively, to enable the engine to have two valve lifts, a control cam is further provided on one side of the first cam or the second cam, the control cam can actuate the blocking mechanism, and the rocker arm roller is blocked from switching in a switching prohibited portion of the first cam and the second cam, and is allowed to switching in a non-switching prohibited portion.

A variable valve actuation device for an engine includes a rocker arm mechanism, a camshaft, an actuation mechanism and a blocking mechanism. The rocker arm roller can slide on a roller shaft so as to have two operating positions, a first cam and a second cam which are adjacent are provided on the camshaft, the rocker arm mechanism is actuated, based on the different operating positions of the rocker arm roller, by the first cam or the second cam, respectively, to enable the engine to have two valve lifts, a control cam is further provided on one side of the first cam or the second cam, the control cam can actuate the blocking mechanism, and the rocker arm roller is blocked from switching in a switching prohibited portion of the first cam and the second cam, and is allowed to switching in a non-switching prohibited portion.

A camshaft phaser comprising an advance one-way clutch and a retard one-way clutch. The camshaft phaser comprises an input component arranged to receive torque from an engine, an advance inner ring, a plurality of rollers circumferentially arranged around the advance inner ring, an advance outer ring radially disposed between the input component and the advance inner ring, and an actuation assembly arranged to be disposed within a camshaft, the actuation assembly comprises advance locking pin assemblies arranged in advance channels and an actuator rod. For an advanced mode, the actuator rod is arranged to radially displace advance locking pin assemblies to non-rotatably connect the camshaft and advance inner ring, the rollers ride up ramps on advance outer ring, which expands radially to engage the input component. The retard clutch is substantially similar, and arranged diametrically opposed, to the advance clutch.

A modularized multifunctional variable valve actuation system for use in a six-cylinder internal combustion engine. The system mainly comprises fuel supply modules (5 and 6), a phase limiting module (2), a mode selection module (22), control modules (3 and 4), a fuel transfer module (7), and a valve actuation module (1). The phase limiting module (2), with an extremely simple structure, implements a valve closing process not limited by operational phases of the fuel supply modules (5 and 6), and at the same time, requires only two fuel supply modules (5 and 6) and two two-way two-position valves (141, 142, and 143) to implement a continuously variable valve event, and requires only two fuel supply modules (5 and 6), two three-way two-position valves (191, 192, and 193), and one two-way two-position valve (141, 142, and 143) to implement a fully variable valve event, thus greatly reducing costs. The mode selection module (22) implements flexible conversion of an actuation mode and a braking mode of an internal combustion engine. Components of the system are functionally independent, modules are selected on the basis of requirements such as a gas distribution mode, the flexibility of valve operations, and the presence or absence of the braking mode, and the need for altering other modules is obviated. Thus, the system has a great suitability and a wide range of applications.