Abstract: A vehicle includes an engine having a crankshaft, an electric machine having a shaft, and a front end accessory drive (FEAD). The FEAD includes a multi-speed pulley assembly mounted to one of the crankshaft and the shaft, a pulley mounted to the other of the crankshaft and the shaft, and a tension member trained around the multi-speed pulley assembly and the pulley. The multi-speed pulley assembly is configured to establish a low speed ratio between the shaft and the crankshaft and a high speed ratio between the shaft and the crankshaft. A vehicle controller is programmed to, in switch between the high speed ratio and the low speed ratio to optimize operating conditions of the FEAD.

Abstract: A vehicle includes an engine having a crankshaft, an electric machine having a shaft, and a front end accessory drive (FEAD). The FEAD includes a multi-speed pulley assembly mounted to one of the crankshaft and the shaft, a pulley mounted to the other of the crankshaft and the shaft, and a tension member trained around the multi-speed pulley assembly and the pulley. The multi-speed pulley assembly is configured to establish a low speed ratio between the shaft and the crankshaft and a high speed ratio between the shaft and the crankshaft. A vehicle controller is programmed to, in switch between the high speed ratio and the low speed ratio to optimize operating conditions of the FEAD.

Abstract: A crankshaft, for use with a variable compression ratio engine having a connecting rod and a rod bearing, includes a crankpin adapted to be coupled to the connecting rod with the rod bearing disposed between the crankpin and the connecting rod. The crankpin includes a circumferential surface having first and second side surface portions and a main surface portion disposed between the side surface portions. The main surface portion is configured to receive the rod bearing. The first side surface portion has a first aperture disposed at least partially outwardly of the rod bearing when the rod bearing is received on the main surface portion of the crankpin and the crankpin is coupled to the connecting rod. The crankpin further defines, at least partially, a first fluid passage for supplying pressurized fluid to the first aperture, such that the fluid is useable to vary compression ratio of the engine.

Abstract: A crankshaft, for use with a variable compression ratio engine having a connecting rod and a rod bearing, includes a crankpin adapted to be coupled to the connecting rod with the rod bearing disposed between the crankpin and the connecting rod. The crankpin includes a circumferential surface having first and second side surface portions and a main surface portion disposed between the side surface portions. The main surface portion is configured to receive the rod bearing. The first side surface portion has a first aperture disposed at least partially outwardly of the rod bearing when the rod bearing is received on the main surface portion of the crankpin and the crankpin is coupled to the connecting rod. The crankpin further defines, at least partially, a first fluid passage for supplying pressurized fluid to the first aperture, such that the fluid is useable to vary compression ratio of the engine.

Abstract: The lost motion arm 44 has first and second contact surfaces 102 and 104. A latch mechanism is connected on the body with an extendable plunger 120 having a first contact surface 124 and a second contact surface 126. The plunger 120 has a first position for first contact surface 124 engagement with the lost motion arm first contact surface 102 to prevent angular movement of the lost motion arm 44 with respect to the body 10 in a first angular direction. When angular movement in the first angular direction is prevented, the motion of the lost motion arm 44 imparted by the cam lobe 66 is transmitted to the body 10 to provide for a first state of operation of the valve stem 18. When the plunger 120 is in a second position, non-contacting with the lost motion arm 44, the lost motion arm 44 is allowed to pivot relative to the body 10. Accordingly, the rocker arm assembly 7 will be in a second state of total or partial deactivation of the valve stem 18.