Abstract: A rocker arm includes an outer arm with an outer follower including a first outer roller and a second outer roller both supported on an outer arm roller shaft, the outer arm roller shaft having a first portion having a first diameter which is supported in the outer arm by a first outer bearing; a second portion having a second diameter which is supported in the outer arm by a second outer bearing; and a third portion having a third diameter such that the third diameter is smaller than the first diameter and the second diameter. An inner arm selectively pivots relative to the outer arm, the inner arm having an inner follower and also having an inner arm aperture through which the outer arm roller shaft extends such that the third portion of the outer arm roller shaft is located within the inner arm aperture.

Abstract: A rocker arm includes an outer arm with an outer follower including a first outer roller and a second outer roller both supported on an outer arm roller shaft, the outer arm roller shaft having a first portion having a first diameter which is supported in the outer arm by a first outer bearing; a second portion having a second diameter which is supported in the outer arm by a second outer bearing; and a third portion having a third diameter such that the third diameter is smaller than the first diameter and the second diameter. An inner arm selectively pivots relative to the outer arm, the inner arm having an inner follower and also having an inner arm aperture through which the outer arm roller shaft extends such that the third portion of the outer arm roller shaft is located within the inner arm aperture.

Abstract: A rocker arm includes a follower which follows a first lobe of a camshaft and is mounted to a rocker arm body; a lock pin that is selectively moveable in a lock bore between a first position and a second position in order to prevent relative movement between the rocker arm body and the follower in one of the first position and the second position and to permit relative movement between the rocker arm body and the follower in the other of the first position and the second position; and a rocker arm oil passage in fluid communication with the lock bore for communicating oil therethrough to move the lock pin between the first position and the second position. The rocker arm oil passage is elongated in a circumferential direction relative to the lock bore.

Abstract: A rocker arm includes a follower which follows a first lobe of a camshaft and is mounted to a rocker arm body; a lock pin that is selectively moveable in a lock bore between a first position and a second position in order to prevent relative movement between the rocker arm body and the follower in one of the first position and the second position and to permit relative movement between the rocker arm body and the follower in the other of the first position and the second position; and a rocker arm oil passage in fluid communication with the lock bore for communicating oil therethrough to move the lock pin between the first position and the second position. The rocker arm oil passage is elongated in a circumferential direction relative to the lock bore.

Abstract: A two-step roller finger follower having a high-lift follower portion that pivots on a pivot shaft disposed on a low-lift follower portion, and having a lost-motion spring disposed between the high-lift follower and the low-lift follower to bias the high-lift follower toward the high lift cam lobe. Various bearing cups and roller shaft sleeve embodiments are shown, all of which allow for improved shaft and needle bearing arrangements. A z-stop formed by the bearing cups and/or the shaft sleeve limits the range of travel of the high-lift follower with respect to the low-lift follower. Various z-stop embodiments are provided including a non-contacting roller shaft sleeve that grounds the high-lift follower to the low-lift follower independent of the roller shaft.

Abstract: A two-step roller finger follower having a high-lift follower portion that pivots on a pivot shaft disposed on a low-lift follower portion, and having a lost-motion spring disposed between the high-lift follower and the low-lift follower to bias the high-lift follower toward the high lift cam lobe. Various bearing cups and roller shaft sleeve embodiments are shown, all of which allow for improved shaft and needle bearing arrangements. A z-stop formed by the bearing cups and/or the shaft sleeve limits the range of travel of the high-lift follower with respect to the low-lift follower. Various z-stop embodiments are provided including a non-contacting roller shaft sleeve that grounds the high-lift follower to the low-lift follower independent of the roller shaft.