Abstract: An electronics housing for a high voltage system of a vehicle defines an interior region, and includes a connection header wall having a window. An optical proximity sensor is disposed within the interior region of the electronics housing, adjacent the window. A cover is removably attached to the electronics housing adjacent an exterior surface of the connection header wall. The cover is disposed over the window. The optical proximity sensor is operable to sense the presence of the cover through the window when the cover is attached to the electronics housing.

Abstract: A drive belt tensioner for mounting to a motor-generator unit comprises a tensioner pulley support having a centrally located pivot defining a pivot axis and first and second reaction arms extending outwardly from the centrally located pivot to define an angle therebetween. Tensioner pulleys are rotatably mounted to the second ends of each of the first and second reaction arms. The reaction arms are configured to flexibly bias the tensioner pulleys when engaged by a drive belt force to maintain a desired drive belt tension.

Abstract: A powertrain assembly includes an internal combustion engine, a boost mechanism and a fluid supply mechanism. The boost mechanism is in communication with an air source and the internal combustion engine. The fluid supply mechanism includes a first accumulator in communication with a pressurized fluid supply from the internal combustion engine and the boost mechanism. The accumulator receives pressurized fluid from the internal combustion engine during engine operation and provides the pressurized fluid to the boost mechanism during an engine off condition.

Abstract: An electronics housing for a high voltage system of a vehicle defines an interior region, and includes a connection header wall having a window. An optical proximity sensor is disposed within the interior region of the electronics housing, adjacent the window. A cover is removably attached to the electronics housing adjacent an exterior surface of the connection header wall. The cover is disposed over the window. The optical proximity sensor is operable to sense the presence of the cover through the window when the cover is attached to the electronics housing.

Abstract: A drive belt tensioner assembly for a motor-generator unit is comprises a motor-generator unit having a rotatable drive pulley, configured to engage a drive belt, extending therefrom. A drive belt assembly housing is fixed to the motor-generator unit and has an inner surface defining an opening through which the rotatable drive pulley of the motor-generator unit extends. A tensioner mounting ring is mounted to, and rotatable with respect to, the drive belt assembly housing. A tensioner pulley is mounted for rotation on the tensioner mounting ring and is configured to engage the drive belt on a side of the motor-generator unit drive pulley. A biasing assembly having a first end mounted to the tensioner mounting ring and a second end mounted in a fixed relationship to the motor-generator unit exerts a biasing force on the tensioner mounting ring to rotate the ring and the tensioner pulley against the drive belt.

Abstract: A belt tensioner for a starter generator drive is provided. The belt tensioner comprises a carrier having a pivot defining a first pivot axis at a first end and a carrier arm extending from the pivot to terminate in a second end. An idler pulley is rotatably mounted to the carrier for rotation about the first pivot axis and a tensioner pulley is rotatably mounted to the carrier at the second end of the carrier arm for rotation about a second axis. The second axis extends parallel to and is arcuately moveable relative to, the first pivot axis. A tensioner is in communication with the second end of the carrier arm for biasing the carrier arm and the tensioner pulley against a drive belt for tensioning the drive belt engaged by the idler pulley and the tensioner pulley.

Abstract: A powertrain assembly includes an internal combustion engine, a boost mechanism and a fluid supply mechanism. The boost mechanism is in communication with an air source and the internal combustion engine. The fluid supply mechanism includes a first accumulator in communication with a pressurized fluid supply from the internal combustion engine and the boost mechanism. The accumulator receives pressurized fluid from the internal combustion engine during engine operation and provides the pressurized fluid to the boost mechanism during an engine off condition.

Abstract: A hybrid powertrain system includes an internal combustion engine mechanically coupled through a planetary gear set to an accessory drive and a torque machine. Operator inputs and engine operating parameters are monitored to select an operational state including one of an autostop accessory control state, autostart operation state, engine torque assist state, and energy power generation state.

Abstract: A system for maintaining tension in a drive belt comprises a first belt tensioner that comprises a first pulley mounted on a first lever arm, and a second belt tensioner that comprises a second pulley mounted on a second lever arm. The first belt tensioner is configured and positioned to bias the first pulley against the drive belt at a first location following a departure of the drive belt from a pulley coupled to a motor-generator unit and to thereby maintain tension on the drive belt during both driving and driven modes of the motor-generator unit. The second belt tensioner is configured and positioned to bias the second pulley against the drive belt at a second location prior to an approach of the drive belt toward the pulley and to thereby maintain tension on the drive belt at the second location during both driving and driven modes.

Abstract: An oil-cooled motor/generator for an automotive powertrain located outside of the transmission is provided, such as a BAS motor/generator. The motor/generator may have a stator, a rotor circumscribed by the stator, and a motor shaft on which the rotor is mounted for rotation. A housing assembly may surround the stator and the rotor, with a bearing positioned between the housing assembly and the motor shaft. A flow control member may at least partially circumscribe the rotor axially adjacent the stator. A bearing retainer may be positioned axially adjacent the bearing. A rotor end ring may be axially adjacent the rotor. The housing assembly may have an inlet configured to receive cooling oil. The housing assembly, the flow control member, the bearing retainer and the rotor end ring may be configured to distribute the cooling oil from the inlet to cool the stator, the rotor and the bearing.

Abstract: A hybrid powertrain system includes an internal combustion engine mechanically coupled through a planetary gear set to an accessory drive and a torque machine. Operator inputs and engine operating parameters are monitored to select an operational state including one of an autostop accessory control state, autostart operation state, engine torque assist state, and energy power generation state.

Abstract: An oil-cooled motor/generator for an automotive powertrain located outside of the transmission is provided, such as a BAS motor/generator. The motor/generator may have a stator, a rotor circumscribed by the stator, and a motor shaft on which the rotor is mounted for rotation. A housing assembly may surround the stator and the rotor, with a bearing positioned between the housing assembly and the motor shaft. A flow control member may at least partially circumscribe the rotor axially adjacent the stator. A bearing retainer may be positioned axially adjacent the bearing. A rotor end ring may be axially adjacent the rotor. The housing assembly may have an inlet configured to receive cooling oil. The housing assembly, the flow control member, the bearing retainer and the rotor end ring may be configured to distribute the cooling oil from the inlet to cool the stator, the rotor and the bearing.

Abstract: A drive belt tensioner for mounting to a motor-generator unit comprises a tensioner pulley support having a centrally located pivot defining a pivot axis and first and second reaction arms extending outwardly from the centrally located pivot to define an angle therebetween. Tensioner pulleys are rotatably mounted to the second ends of each of the first and second reaction arms. The reaction arms are configured to flexibly bias the tensioner pulleys when engaged by a drive belt force to maintain a desired drive belt tension.

Abstract: A drive belt tensioner assembly for a motor-generator unit is comprises a motor-generator unit having a rotatable drive pulley, configured to engage a drive belt, extending therefrom. A drive belt assembly housing is fixed to the motor-generator unit and has an inner surface defining an opening through which the rotatable drive pulley of the motor-generator unit extends. A tensioner mounting ring is mounted to, and rotatable with respect to, the drive belt assembly housing. A tensioner pulley is mounted for rotation on the tensioner mounting ring and is configured to engage the drive belt on a side of the motor-generator unit drive pulley. A biasing assembly having a first end mounted to the tensioner mounting ring and a second end mounted in a fixed relationship to the motor-generator unit exerts a biasing force on the tensioner mounting ring to rotate the ring and the tensioner pulley against the drive belt.

Abstract: A belt tensioner for a starter generator drive is provided. The belt tensioner comprises a carrier having a pivot defining a first pivot axis at a first end and a carrier arm extending from the pivot to terminate in a second end. An idler pulley is rotatably mounted to the carrier for rotation about the first pivot axis and a tensioner pulley is rotatably mounted to the carrier at the second end of the carrier arm for rotation about a second axis. The second axis extends parallel to and is arcuately moveable relative to, the first pivot axis. A tensioner is in communication with the second end of the carrier arm for biasing the carrier arm and the tensioner pulley against a drive belt for tensioning the drive belt engaged by the idler pulley and the tensioner pulley.

Abstract: A tensioner assembly for an endless drive element is provided that utilizes rotary motion and damping with decoupled tensioning and damping components. The tensioner assembly includes a rotatable element in contact with a span of the drive element and rotatable via the drive element, and a first linkage supporting the rotatable element for rotation thereon. A torsion spring connects the first linkage for pivoting about a pivot point with respect to a base. The torsion spring is configured to bias the rotatable element in a direction to tension the drive element. A linear damper is operatively connected to the first linkage at a distance from the pivot point, such as by a second linkage or lever arm, and connected to the base for damping pivoting motion of the first linkage.

Abstract: A pulley alignment gauge for aligning pulleys in a drive system, such as a front end accessory drive system on an automotive engine, includes pulley mounts and a laser connected to a frame. The drive belt is removed before the gauge is placed on the pulleys. The pulley mounts position the gauge on one of the pulleys in the pair to be aligned. The laser emits a light beam onto the adjacent pulley to determine pulley alignment. The laser targets the center rib of the adjacent pulley being aligned and the rib spacing is used to gauge the degree of misalignment.