A vehicle drive system includes a first prime mover, a transmission, a power take-off (PTO), a lubrication system for the transmission and the PTO, and a control system. The transmission is powered by the first prime mover. The transmission is configured to rotate a drive shaft of the vehicle. The PTO is connected to the transmission at a first interface. The PTO includes the first interface and a second interface. The control system is configured to control fluid flow through the lubrication system for at least one mode where the input section of the PTO is stationary and the output section rotates.

A lubrication system for a machine such as a mobile generator, a mobile light tower, or a mobile jobsite heater implements an engine oil supplementation strategy from an auxiliary sump to increase service time between engine oil servicing tasks of an internal combustion engine. The system periodically introduces a supplemental volume of oil from an auxiliary sump into the engine's lubricating system during an oil supplement event. The fluid communication between the engine sump and auxiliary sump may be achieved through multiple sump connections, which may include a sump-to-sump return line that provides a liquid connection allowing oil to freely flow between the engine sump and the auxiliary sump and a vent line that provides a gaseous connection between a void space at an upper end of the auxiliary sump and a void space at an upper end of the engine sump.

A lubrication system for a machine such as a mobile generator, a mobile light tower, or a mobile jobsite heater implements an engine oil supplementation strategy from an auxiliary sump to increase service time between engine oil servicing tasks of an internal combustion engine. The system periodically introduces a supplemental volume of oil from an auxiliary sump into the engine's lubricating system during an oil supplement event. The fluid communication between the engine sump and auxiliary sump may be achieved through multiple sump connections, which may include a sump-to-sump return line that provides a liquid connection allowing oil to freely flow between the engine sump and the auxiliary sump and a vent line that provides a gaseous connection between a void space at an upper end of the auxiliary sump and a void space at an upper end of the engine sump.

A tool to facilitate alignment and synchronization of an internal combustion engine oil pump drive shaft and distributor. In a preferred embodiment, the tool is a tubular shaped shaft having cross pieces arranged in both ends of the shaft to facilitate such alignment.

A tool to facilitate alignment and synchronization of an internal combustion engine oil pump drive shaft and distributor. In a preferred embodiment, the tool is a tubular shaped shaft having cross pieces arranged in both ends of the shaft to facilitate such alignment.

A piston structure of an engine includes a piston having a crown part including a crown surface defining a combustion chamber, and an opposite back surface, an oil jet, a center-side first cavity and an outer-circumference-side second cavity formed inside the crown part and partitioned from each other, each cavity including a ceiling surface on the combustion chamber side and an opposite bottom surface, a communicating hole that is formed in a partitioning wall between the cavities, an introduction hole that is formed in the bottom surface of the first cavity and introduces into the first cavity oil injected toward the back surface from the oil jet, and a discharge hole that is formed in the bottom surface of at least one cavity and discharges the oil. The ceiling surface of the second cavity is located on the combustion chamber side of the ceiling surface of the first cavity.

A piston structure of an engine includes a piston having a crown part including a crown surface defining a combustion chamber, and an opposite back surface, an oil jet, a center-side first cavity and an outer-circumference-side second cavity formed inside the crown part and partitioned from each other, each cavity including a ceiling surface on the combustion chamber side and an opposite bottom surface, a communicating hole that is formed in a partitioning wall between the cavities, an introduction hole that is formed in the bottom surface of the first cavity and introduces into the first cavity oil injected toward the back surface from the oil jet, and a discharge hole that is formed in the bottom surface of at least one cavity and discharges the oil. The ceiling surface of the second cavity is located on the combustion chamber side of the ceiling surface of the first cavity.

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.

The present invention relates to an oil control solenoid valve with improved pressure balance for high pressure applications and a method of assembling thereof. More particularly, the present invention provides an oil control solenoid valve (101) with a pressure balance assembly comprising of a fixed sleeve (2) with at least one inlet and one outlet, a movable plunger (1) having two ends and at least one bush (3) and the method of assembling thereof thus providing the pressure balance at both the ends of the plunger (1).

The present invention relates to an oil control solenoid valve with improved pressure balance for high pressure applications and a method of assembling thereof. More particularly, the present invention provides an oil control solenoid valve (101) with a pressure balance assembly comprising of a fixed sleeve (2) with at least one inlet and one outlet, a movable plunger (1) having two ends and at least one bush (3) and the method of assembling thereof thus providing the pressure balance at both the ends of the plunger (1).