A method of diagnosing a PCJ solenoid valve includes determining whether a predetermined diagnostic condition is satisfied; performing diagnostic spraying by controlling the PCJ solenoid valve to cause the PCJ to spray oil for a predetermined diagnostic spraying time when the controller concludes that the predetermined diagnostic condition is satisfied; and diagnosing a failure of the PCJ solenoid valve by use of changes of oil pressure introduced to the PCJ or of PWM duty that controls an oil pump configured for pumping oil supplied to the PCJ after the diagnostic spraying from the PCJ.

Typically, an engine-compressor for compressing natural gas for use as a fuel has a single cooling circuit to cool both its combustion unit and compression unit. A single cooling circuit design is not ideal because the optimal temperature for the combustion unit is higher than the compression unit of the engine-compressor. The present invention provides a dual zone cooling system to cool the combustion unit separately from the compression unit.

Systems, devices, and methods are disclosed that during cylinder deactivation, including skipfire, at low engines speeds and low engine loads maintain adequate oil pressure of valvetrain components or hardware required for CDA and/or skipfire operation.

An oil-spray tube assembly includes a tube having an outer circumferential surface, an inner circumferential surface defining a hollow center, a closed distal end, an open proximal end defining an axially recessed annular seat, and an orifice extending between the inner and outer surfaces. A poppet valve has a radially extending flange and is received in the hollow center with the flange disposed on the annular seat. The valve defines an inlet, a cylindrical valve chamber in fluid communication with the inlet, an outlet exiting the valve chamber, and a valve seat between the inlet and the outlet. A ball is disposed within the valve chamber and is movable between a closed position in which the ball is seated on the valve seat to sever fluid communication between the inlet and the outlet and an open position in which the ball is spaced from the valve seat to place the inlet and outlet in fluid communication.

A second temperature adjustment medium branches and flows into the first branch flow path and the second branch flow path at the branching portion, the second temperature adjustment medium and the second temperature adjustment medium are merged at the merging portion and flow through the pressure feed flow path to be supplied to the first pump, and the second temperature adjustment medium circulates through the second temperature adjustment circuit. A valve device configured to adjust a flow rate of the second temperature adjustment medium flowing through the second branch flow path is provided in the second branch flow path between the branching portion and the heat exchanger. The control device is configured to control the valve device to block the second temperature adjustment medium from flowing through the second branch flow path when a failure of the heat exchanger is detected.

A spray nozzle comprising: a body comprising a duct, a seat arranged at the first end, and including an opening forming an inlet, a guide comprising a tubular jacket and a retaining member, the retaining member retaining the jacket in the duct, a plug mounted to slide axially in the channel of the jacket, the plug being pushed back against the opening by a spring, and in abutment against the bottom of the jacket, the guide comprising a radial vent, which comprises a vent channel isolated from the flow of fluid and connecting the inside of the guide jacket to a bore formed in the body of the spray nozzle.

An engine assembly is provided. The engine assembly comprises an oil system comprising: a first oil pump configured to supply oil at a first pressure to one or more first components of the engine assembly; and a second oil pump configured to supply oil at a second pressure to one or more second components of the engine assembly, the second pressure being higher than the first pressure; wherein the second oil pump is provided adjacent to a valve train of the engine assembly.

A heat exchanger system for an agricultural vehicle. The heat exchanger system has at least two separate heat exchanger assemblies, where an adjustable baffle is used to vary the airflow between the heat exchanger assemblies, accordingly varying the cooling effect of the assemblies, based on system requirements. The adjustable baffle may be arranged to restrict or block at least a portion of a heat exchanger to reduce airflow through the exchanger, to provide a flow bypass of an exchanger, and/or to proportionally adjust the airflow through a pair of heat exchangers provided as part of a single heat exchanger assembly.

A work machine in which an engine and a reserving unit configured to reserve lubricating oil to be supplied to the engine are connected by a lubricating oil channel, and the lubricating oil is circulated, wherein at least a part of the lubricating oil channel and at least a part of a working fluid channel for a working fluid to be supplied to a work unit of the work machine are arranged such that heat can be exchanged between the lubricating oil and the working fluid.

A piston pin is provided that includes a pin oil channel to which oil is supplied from the connecting rod. A piston is provided that includes a pin boss, an oil groove formed in a pin bore surface, and a communication oil channel that connects a cooling channel that is provided closer to a combustion chamber than the piston pin and the oil groove to each other. The pin oil channel opens in the outer surface of the piston pin at a point corresponding to the oil groove. In the view of the piston from the direction of the piston pin axis, the oil groove is formed in the pin bore surface at a position closer to a crankcase than a second straight line and is not formed in a part of the pin bore surface that is closer to the combustion chamber than the second straight line.