A transport refrigeration system having: a first engine (26) configured to power a refrigeration unit (22); a first fuel tank (330) fluidly connected to the first engine through a first fuel line (332); a first shut off valve (450) located within the first fuel line proximate the first fuel tank; a second shut off valve (72) located within the first fuel line proximate the first engine; a sensor system (80) configured to detect at least one of a crash of the transport refrigeration system, a fuel leak in the first fuel line, and an engine stall in the first engine; and a controller (30) configured to close the first shutoff valve and the second shutoff valve when the sensor system detects at least one of a crash of the transport refrigeration system, a fuel leak in the first fuel line, and an engine stall in the first engine.

A method for detecting the quantity of gas (m) which is supplied by means of a gas supply device to an antechamber of an internal combustion engine, whereby a targeted disturbance (u) of the gas quantity (m) supplied by the gas supply device is performed and a change (T) resulting from the target disturbance (u) in an exhaust gas temperature (T) of an exhaust gas generated in a combustion chamber connected to the antechamber is measured, whereby, by comparison with a target value of the change (Ttarget) of the exhaust gas temperature (T), the gas quantity (m) supplied by means of the gas supply device is deduced.

The disclosure relates to a gas valve unit having an enclosure provided with an inlet and an outlet, with an inner pipe arranged to extend from the inlet to the outlet via the enclosure forming a gas tight piping inside the enclosure, and an outer pipe arranged to open into the enclosure via an at least one opening. Walls of the inner pipe and the outer pipe form a space there between as a first volume, and the enclosure forms a space inside as a second volume, the first and second volumes being arrangeable in flow communication with each other via an opening in connection with the outer pipe. At least one blocking unit selectively blocks the at least one opening in connection with the outer pipe and the flow communication between the first volume and the second volume.

Disclosed is a method for determining operation of a valve in a gas tank system comprising a plurality of gas tank and valve arrangements, each comprising a gas tank and at least one valve arranged at a passage downstream said gas tank. The method comprises: opening the valves at the passages in a first set of gas tank and valve arrangements; determining a first pressure value at a gas transportation arrangement downstream all of said opened valves; closing the passage at all gas tank and valve arrangements, except for one gas tank and valve arrangement; waiting a pre-determined amount of time; determining a second pressure value at said gas transportation arrangement downstream the gas and tank and valve arrangement whose valve have not been closed; and determining whether said at least one valve which has not been closed operates properly based on said first and second determined pressure values.

An engine device of including: an intake manifold configured to supply air into a cylinder; a gas injector configured to mix fuel gas with air supplied from the intake manifold, and supply mixed gas to the cylinder; an igniter configured to ignite, in the cylinder, premixed fuel obtained by pre-mixing the fuel gas with the air; and a control unit configured to execute a combustion control of a premixed fuel based on the output signal indicative of an output from the engine device. When the air amount is determined to be insufficient and when the output signal is lost, the control unit estimates an output signal based on the fuel gas injection amount from the gas injector, and executes the combustion control based on the estimated output signal.

A method for preventing back fire of an engine by a device for preventing back fire of an engine, may include monitoring operating information of the engine; determining whether the back fire occurs by using the operating information of the engine; and controlling an ignition timing to be retarded when the back fire occurs as the determination result.

A system for project planning for an engine for determining an operating behavior of the engine to be expected under defined operating conditions of the engine includes: a plurality of sensors configured to measure respective ones of the defined operating conditions of the engine; and a knocking intensity prediction tool configured to determine the knocking intensity of the engine to be expected under the defined operating conditions of the engine.

The disclosure relates to a gas valve unit having an enclosure provided with an inlet and an outlet, with an inner pipe arranged to extend from the inlet to the outlet via the enclosure forming a gas tight piping inside the enclosure, and an outer pipe arranged to open into the enclosure via an at least one opening. Walls of the inner pipe and the outer pipe form a space there between as a first volume, and the enclosure forms a space inside as a second volume, the first and second volumes being arrangeable in flow communication with each other via an opening in connection with the outer pipe. At least one blocking unit selectively blocks the at least one opening in connection with the outer pipe and the flow communication between the first volume and the second volume.

A fuel system and method of controlling the fuel system in an engine using a liquid propane fuel wherein a fluid pressure control module 11 having a housing 12 and plurality of solenoids 20 are provided for venting the fuel pressure in the fuel rails of the fuel system after shut down of the vehicle to reduce fuel leakage from the fuel injectors and fuel rail by having a fuel bleed 20B solenoid vent the fuel pressure in the fuel rail to an evaporative emissions canister, while other solenoids (20R, 20F and 20S) are shut, to further eliminate evaporative fuel emissions from the vehicle during engine shut down.

A method of warming a valve assembly includes receiving an exhaust flow through a first heat exchanger first inlet; heating a coolant received through a first heat exchanger second inlet with the exhaust flow; exhausting the exhaust flow through a first heat exchanger first outlet; and discharging heated coolant through a first heat exchanger second outlet towards a second heat exchanger assembly that is coupled to the valve assembly to heat the valve assembly.