A mobile vehicle lubrication unit for serving power transmission equipment elevated above ground level such as conveyors whereby the lubricant containing gear reducer unit is disposed in an enclosed body mounted on an upper portion of an elevated conveyor. The system includes a manifold system connectable to trailer mounted storage tanks for lubricants, pumps, filters, air supplies and supply lines, and transfer means mounted on a truck or trailer including side access to the control panel and transfer hoses enabling the user to transfer lubricants to elevated equipment such as conveyors by pulling along side of same. The device changes, filters, and replaces the oil in a reducer gearbox or other lubricant containing equipment which is not easily accessed from the ground level. Air presssure is used to evaculate used oil from the conveyor gear motor and/or reducer units and replaces the used oil with filtered or new oil through oil lines and hoses with quick disconnects which may be positioned on a manifold at ground level having oil lines in fluid communication with the gear motor/reducer unit.

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 assembling apparatus may include an oil pump provided in an oil pan, a partition wall, and a shock absorbing member. The partition wall divides an internal space of the oil pan and is formed to partially surround an external surface of the oil pump, so as to support the oil pump. The shock absorbing member is disposed between an external surface of the oil pump and the partition wall to be in contact therewith. In this structure, the assembling apparatus may mitigate noise and vibration of the oil pump that is built in the oil pan.

A lubrication structure for an internal combustion engine includes a crankcase, an oil pump, and a relief valve. The crankcase is configured by connecting an upper crankcase on a mating surface of a lower crankcase, and has an oil pan. The oil pump and the relief valve are installed in the lower crankcase. The oil pump sucks oil in the oil pan through a suction passage, and discharges the oil into a discharge passage. The relief valve performs a valve-opening operation according to pressure of oil in the discharge passage to return surplus oil in the discharge passage to the suction passage through a surplus passage. These passages are formed in the lower crankcase. A relief valve housing section housing the relief valve, and the surplus passage allowing the relief valve housing section and the suction passage to communicate with each other, are provided to communicate with the mating surface.

A method for reducing noise generated from an electric oil pump (EOP) is reduced while driving a vehicle which has only the EOP without a mechanical oil pump (MOP) limits revolutions per minute (RPM) of the EOP to 70% or less of a maximum RPM during a low noise driving mode and rotates the EOP at the maximum RPM during a high noise driving mode.

Present embodiments relate to an engine oiling system. More specifically, but without limitation, present embodiments relate to an engine oiling system which provides a lower profile for the engine within the engine compartment.

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.

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. The pump part includes a pump rotor and a pump housing having a housing part. The control part includes a plurality of electronic components and a board. The motor housing has a cylindrical part in which the rotor and the stator are accommodated, a plurality of heat dissipating fins that extend from the cylindrical part, and a fin support that supports the heat dissipating fins. The heat dissipating fins are disposed at intervals in the axial direction. The fin support has an inter-fin through-hole between a pair of heat dissipating fins adjacent in the axial direction.

An engine power unit for a vehicle has a crankcase made up of tow left and right crankcase members, and a lubricant feed pump disposed in one crankcase member in such a fashion that one side surface of pump rotors of the feed pump lies on the mating surface of the crankcase members. The feed pump is mounted on one end of the shaft of the feed pump while a drive gear for rotating the shaft is disposed on the opposite end of the shaft. A lubricant oil filter to which oil is delivered from the feed pump is disposed on the other crankcase member. Thus, the structure for supplying lubricating oil is simplified, and the power unit is reduced in size in its entirety.

In one or more embodiments, a pressure relief valve for a fluid pump has a valve head that has a recessed outlet-side surface that confronts a support end of a spring such that the valve head extends past the support end of the spring toward a pump outlet. The spring is biased to urge the valve head against a valve seat to a seated position. The spring is also configured to be compressed when fluid pressure at an inlet to the relief valve exceeds fluid pressure at the outlet by at least a predetermined amount such that the valve head is pushed away from the valve seat to an unseated position. A pressure relief valve may have multiple outlets at least some of which have unequal flow areas such that fluid pressure distribution across the flow area of the pressure relief valve cavity is nonsymmetrical.