A clutched pulley assembly mountable to the shaft of a motor-generator unit (MGU) has a first sheave, with first spline teeth, rotatably mounted to the MGU shaft, and a second sheave, with second spline teeth, fixed to the MGU shaft. A slider gear with slider gear spline teeth is axially moveable between a torque transfer position, where the slider gear spline teeth simultaneously intermesh with the spline teeth of the first and second sheaves to operatively connect the sheaves to each other, and a torque cut-off position, where the slider gear spline teeth intermesh with the second sheave spline teeth but not the first sheave spline teeth so as to operatively disconnect the sheaves. An actuator drives the slider gear between the torque transfer and cut-off positions. The pulley assembly can be used in a stand-cooling mode wherein the engine is stopped but the MGU powers a load.

Described is a power system having an engine, a generator, a belt-driven component, a first pulley, a second pulley, a third pulley, and a fourth pulley. The engine outputs a rotational force at a first rotational speed to rotate the first pulley. The generator converts mechanical power driving the generator shaft to electric power. The second pulley is drivingly coupled to the first pulley via a first belt and configured to rotate the generator shaft at a second rotational speed based on the first rotational speed. The fourth pulley coupled to the generator shaft having a first diameter that is greater than a second diameter of the second pulley. The fourth pulley configured to drive the third pulley at a third rotational speed to drive the belt-driven component

A vehicle has an internal combustion engine, an accessory, and a system having first and second belts extending between a drive assembly rotatably connected to a crankshaft of the engine and a driven assembly rotatably connected to a driveshaft of the accessory. One of the drive and driven assemblies comprises a mechanism with a shaft supporting first and second pulleys, with the first and second pulleys associated with the first and second belts, respectively. The first pulley is selectively engaged with the shaft in response to an engine speed being below a threshold value, and the second pulley is selectively engaged with the shaft in response to the engine speed being above the threshold value.

A two-speed pulley assembly for an engine accessory drive includes a planetary gear, a pulley, a friction clutch, and a one-way clutch. The planetary gear has a ring gear, a sun gear, a planet carrier, and a planet gear. The planet gear is rotatable relative to the planet carrier and is drivingly engaged with the ring gear and the sun gear. The pulley circumscribes the ring gear and is in driving engagement with the ring gear. The friction clutch is arranged to selectively prevent rotation of the sun gear. The one-way clutch is arranged between the sun gear and the ring gear to permit rotation of the sun gear relative to the ring gear in a first rotational direction, and prevents rotation in a second rotational direction, opposite the first rotational direction.

The present discloser is directed toward a method for detecting misalignment of a belt for a front end accessory drive system. The method includes acquiring, by a plurality of optical sensors, multiple images of the belt arranged on a series of pulleys of the drive system. The belt includes a contrast element that is detectable by the optical sensors system and is visually distinct from a color of the belt. The method further includes analyzing, by way of a controller, data indicative of the acquired images to determine whether the contrast element is present in the captured images, and identifying the belt as being misaligned in response to the contrast element being in at least one of the acquired images.

An accessory drive pulley assembly is configured to transfer rotational power from an engine crankshaft to one or more vehicle accessories. The accessory drive pulley has an inner race rotatable about an axis and having an outer surface. An outer race is located radially outward from the inner race and has an inner surface facing the inner race. A wedge plate is located radially between the outer surface and the inner surface. The wedge plate is configured to expand and contract radially to selectively lock and unlock the inner race with the outer race. When locked, an associated pulley can rotate at a different speed than when unlocked.

A belt cover for an internal combustion engine is provided, and the belt cover efficiently discharges water from a drain hole and has good sealing performance. A water pump 30, which is disposed on one side surface of a cylinder block CB, and which includes a drain hole 35, an oil pump case OP, which covers the inside of a timing belt TB, and a lower cover 9, which covers the outside of the timing belt TB are included. The oil pump case OP and the lower cover 9 are fixed with each other through a seal member 40, and constitute a lower case 90. A guide rib 91 and a discharge port 92 are formed inside the lower case 90, the guide rib 91 being for guiding drained water from the drain hole 35, while separating from the timing belt TB, the discharge port 92 being for discharging the drained water from the lower case 90 at a bottom end of the lower case 90, and the drained water from the drain hole 35 is guided by the guide rib 91 toward the discharge port 92.

A belt cover for an internal combustion engine is provided, and the belt cover efficiently discharges water from a drain hole and has good sealing performance. A water pump 30, which is disposed on one side surface of a cylinder block CB, and which includes a drain hole 35, an oil pump case OP, which covers the inside of a timing belt TB, and a lower cover 9, which covers the outside of the timing belt TB are included. The oil pump case OP and the lower cover 9 are fixed with each other through a seal member 40, and constitute a lower case 90. A guide rib 91 and a discharge port 92 are formed inside the lower case 90, the guide rib 91 being for guiding drained water from the drain hole 35, while separating from the timing belt TB, the discharge port 92 being for discharging the drained water from the lower case 90 at a bottom end of the lower case 90, and the drained water from the drain hole 35 is guided by the guide rib 91 toward the discharge port 92.

A utility vehicle includes a plurality of ground-engaging members, a frame supported by the ground-engaging members, a powertrain assembly supported by the frame which includes an engine, an alternator coupled to the engine through a housing, and a heating, ventilation, and air condition (HVAC) assembly including a compressor operably coupled to the engine. The compressor is supported on a first side of the housing plate and the alternator is supported on a second side of the housing.

A dynamic belt-tensioning apparatus for a treadmill includes a base having a first end and a second end spaced from the first end. A foot-striking platform is movably supported by the base so as to allow vertical movement of the platform during operation of the treadmill. A drive belt has a fixed circumference and is positioned above a top portion of the platform. A drive roller is pivotally mounted adjacent to the first end of the base and engages the drive belt. A tensioning roller is pivotally mounted to the base and is capable of a range of movement to provide substantially constant tension to the drive belt in response vertical movement of the platform.