A fluid delivery system includes a reservoir for storing fluid, a rotary pump having a first pump port and a second pump port, a first fluid conduit connecting the first pump port to the reservoir, and a second fluid conduit connecting the second pump port to the reservoir. The rotary pump rotates in a first delivery direction in a normal mode and in a second delivery direction in an alternative mode. A first valve separates the first pump port from the reservoir when the rotary pump is in its alternative mode, and a second valve separates the second pump port from the reservoir when the rotary pump is in its normal mode.

Disclosed is an oil pump device for supplying oil from an oil pan located below a casing of an internal combustion engine or transmission of a vehicle. The oil pump device includes a pump unit placed in the casing and having a pump rotation shaft arranged in parallel to a rotation axis of the internal combustion engine, an electric motor having a motor body mounted to an outer lateral side surface of the casing, a mechanical drive shaft rotatable by an output of the internal combustion engine, a mechanical drive connection mechanism connecting the mechanical drive shaft to one end of the pump rotation shaft, and a reduction gear mechanism placed in the casing and connecting the other end of the pump rotation shaft to a motor rotation shaft of the electric motor.

A system is provided for a turbine engine. This turbine engine system includes a rotating assembly, a bearing and a lubrication system. The bearing is configured with the rotating assembly. The lubrication system is configured to lubricate the bearing. The lubrication system includes a lubricant pump and a lubricant reservoir. The lubricant pump is mechanically coupled with and driven by the rotating assembly. The lubricant pump is configured with the lubricant reservoir so as to be at least partially submersed in lubricant contained within the lubricant reservoir.

A motor control system for a lubricant pump motor comprises a pump system power input, a motor drive, a current sensor, a lubrication controller, and a drive controller. The pump system power input is configured to supply system power. The motor drive is configured to drive the lubricant pump motor using the system power. The current sensor is disposed between the pump system power input and the motor drive to sense an input current of the system power. The lubrication controller configured to provide motor activation signals. The drive controller is disposed to receive the motor activation signals via an isolated digital input, and to control the motor drive as a function of the sensed input current and a user-defined current set-point, in response to the activation signals.

A control apparatus is applied to an internal combustion engine. The engine comprises a water pump, and an oil pump. The apparatus makes a second motor to drive the water pump drive the oil pump, if the first motor to drive the oil pump malfunctions. Consequently, if the first motor malfunctions, the oil pump can be driven by the second motor. Thus, the possibility of seizing of the sliding portions of the engine can be reduced. Further, if the first motor malfunctions, the friction in the engine can be reduced, since the oil pump is not driven by the crank shaft.

A lubricant supply system for a motor vehicle, in particular a single-track motor vehicle, includes a lubricant pump configured to convey a lubricant for lubricating engine components in a lubricant circuit of the motor vehicle, and optionally a lubricant filter configured to filter the lubricant conveyed in the lubricant circuit. The lubricant filter is directly attached to the lubricant pump, and/or an imaginary continuation of a pump shaft of the lubricant pump crosses the lubricant filter, and/or at least two lubricant pumps are provided, and the at least two lubricant pumps are driven by a common pump shaft.

A power system including: a power unit, a supply pump for feeding liquid oil for lubricating the power unit; a supply flow path for guiding, to the power unit, the oil fed from the supply pump; a return pump for returning the oil having flowed through the power unit; a return flow path for guiding, to the return pump, the oil having flowed through the power unit; a circulation flow path for guiding, to the supply pump, the oil returned by the return pump; a bypass flow path connecting the supply flow path and the return flow path; and an on-off valve for opening and closing the bypass flow path.

Embodiments of systems and methods disclosed provide a hydraulic fracturing unit that includes a reciprocating plunger pump configured to pump a fracturing fluid and a powertrain configured to power the reciprocating plunger pump. The powertrain includes a prime mover and a drivetrain, the prime mover including a gas turbine engine. The hydraulic fracturing unit also includes auxiliary equipment configured to support operation of the hydraulic fracturing unit including the reciprocating plunger pump and the powertrain. A power system is configured to power the auxiliary equipment. The power system includes a power source and a power network. The power source is configured to generate power for the auxiliary equipment. The power network is coupled to the power source and the auxiliary equipment, and configured to deliver the power generated by the power source to the auxiliary equipment. Associated systems including a plurality of hydraulic fracturing units are also provided.

An engine includes an engine oil system. The engine oil system includes a pump assembly forming a portion of an oil flow path. The pump assembly includes a drive shaft, a plurality of pumps, and a pump housing. The drive shaft extends along a rotational axis. The plurality of pumps are arranged axially along the rotational axis. Each of the plurality of pumps includes a pump rotor coupled with the drive shaft. The pump housing extends along the rotational axis between a first housing end and a second housing end. The pump housing circumscribes and houses the drive shaft and the plurality of pumps between the first housing end and the second housing end. The pump housing includes a plurality of housing body portions axially stacked along the rotational axis to form the pump housing. The plurality of housing body portions collectively form an internal oil passage through the pump housing.