An internal combustion engine includes a one-piece cylinder block casting, a flywheel supported for rotation at a front block end, and a back gear train supported for rotation at a back block end. Cast-in pump inlet and outlet passages are formed in the cylinder block casting and open in a pump mounting face at the back block end. An oil pump is clamped to the pump mounting face and includes a pump inlet and a pump outlet fluidly connected, respectively, to the cast-in pump inlet passage and the cast-in pump outlet passage.

An internal combustion engine includes a one-piece cylinder block casting, a flywheel supported for rotation at a front block end, and a back gear train supported for rotation at a back block end. Cast-in pump inlet and outlet passages are formed in the cylinder block casting and open in a pump mounting face at the back block end. An oil pump is clamped to the pump mounting face and includes a pump inlet and a pump outlet fluidly connected, respectively, to the cast-in pump inlet passage and the cast-in pump outlet passage.

An electric oil pump includes a motor part having a shaft; a pump part that is driven by the motor part via the shaft and discharges oil; and a control part configured to control an operation of the motor part. The motor part includes a rotor, a stator, and a motor housing in which the rotor and the stator are accommodated. The pump part includes a pump rotor attached to the shaft and a pump housing having a housing part in which the pump rotor is accommodated. The control part includes an electronic component and a board having a surface on which the electronic component is mounted. The board is disposed outside the stator in a radial direction and within a range of the motor part in the axial direction, and the surface of the board is disposed to face the stator and extends in the axial direction.

A system for supplying lubricant to a component of a gas turbine engine having a fan shaft is provided. The system includes a pump drivably couplable to the fan shaft for pumping lubricant to the component. The pump includes an inlet for receiving lubricant from a lubricant source, an outlet for outputting lubricant to the component and a swashplate movable between at least a first position and a second position. The system also includes a swashplate actuator for actuating the swashplate between the first position and the second position according to whether the fan shaft is rotating in a forward direction or a reverse direction opposite to the forward direction.

System and methods mount an accessory to an engine block having a pilot bore aligned with a first plane and sealing surfaces aligned to a second plane different than the first plane. The accessory includes a sliding pilot for interfacing with the pilot bore that is capable of sliding in an x direction yet fixed in a y direction with respect to the accessory housing. Interfacing the sliding pilot in a mounting position with the pilot bore along a z direction locates the accessory with respect to the engine block in the y and z directions. Fastening the accessory to the sealing surfaces of the engine block locates the accessory in the x direction with sufficient precision to mitigate gear backlashing and providing one or more fluid seals between the accessory and the engine block.

This application discloses a cylinder block structure including: a cylinder block surrounding a cylinder array formed by a plurality of cylinders lined up in a first direction; a reinforcement plate including: a first fastening portion fastened to the cylinder block; and a second fastening portion fastened to the cylinder block at a position separated from the first fastening portion in a second direction that intersects with the first direction; and an oil pump that supplies oil to the cylinder block. The oil pump is fastened to the cylinder block together with the reinforcement plate. The reinforcement plate is interposed between the cylinder block and the oil pump, and has a length that is equal to or more than half of the cylinder array in the first direction.

An electric oil pump apparatus includes an electric oil pump including a housing main body that accommodates a motor and a pump driven by the motor, a flange portion formed on the housing main body, and a control circuit case for accommodating a control circuit, and a base plate attached to the electric oil pump. The base plate includes an annular main body fixed to the housing main body, and a sealing member located between the annular main body and the housing main body. The annular main body includes a first surface located on one side, a second surface located on the other side, a first through hole for passing the housing main body therethrough, and an annular stepped portion configured to accommodate the sealing member, and formed along an inner edge of the first through hole. The first surface of the base plate is opposed to the flange portion.

A system includes a valve actuation system, a pre-lubrication pump coupled to a lubrication circuit and configured to provide oil to the valve actuation system, a catalyst for receiving and treating exhaust gasses, and a controller. The controller is configured to identify an engine start request and determine whether the catalyst temperature is below a first threshold value. In response to determining that the catalyst temperature is below the first threshold value, the controller actuates the pre-lubrication pump to direct lubricant to the valve actuation system, controls the valve actuation system to deactivate at least one cylinder of an engine, and, subsequent to deactivating the at least one cylinder of the engine, cranks the engine.

An oil pump includes a housing defining a pump cavity having an inner circumferential wall with a first segment located in a low-pressure side of the pump cavity. The first segment defines a recessed cutout. A gerotor pump set is disposed in the cavity and includes an inner drive rotor and an outer driven annulus. An outer circumferential wall of the outer annulus and the cutout cooperate to form an increased radial clearance to reduce friction losses between the outer annulus and the housing.

In an internal combustion engine for a saddle riding vehicle, in which a gear transmission and a shift drum of a shift change device is stored in a crankcase, the gear transmission having a plurality of transmission shafts parallel to a crankshaft extending in a vehicle width direction, a single pump shaft common to first and second oil pumps is rotatably supported by the crankcase. First oil pump rotors of the first oil pump are disposed at a mating face of a pair of left and right crankcase half bodies. A second oil pump rotor of the second oil pump is disposed between a pump gear and the first oil pump and at a side surface, on a side opposite to the mating face, of one crankcase half body out of the pair of left and right crankcase half bodies, the pump gear being arranged in the pump shaft.