Gaseous fuel downstream of a heat exchanger can be too cold for fuel system components when the temperature of engine coolant employed as a working fluid in the heat exchanger is too low to elevate gaseous fuel temperature, and it is possible for the engine coolant to freeze. A method of operating a cryogenic pump for controlling discharge temperature of a heat exchanger that vaporizes a process fluid received from the cryogenic pump with heat from a working fluid, where the cryogenic pump includes a piston reciprocatable in a cylinder between a proximate cylinder head and a distal cylinder head, includes monitoring at least one of process fluid temperature and working fluid temperature; retracting the piston during an intake stroke from the proximate cylinder head to the distal cylinder head; and extending the piston in a plurality of incremental discharge strokes until the piston travels from the distal cylinder head back to the proximate cylinder head. At least one of the number of incremental discharge strokes, a length of incremental discharge strokes and a rest period between incremental discharge strokes is selected such that at least one of the process fluid temperature and working fluid temperature is maintained above a predetermined level.

Provided is a cooler and an engine testing apparatus having the same. The cooler includes a guide unit configured to make a gas flow, a liquid supply unit arranged in the guide unit to supply a liquid into the guide unit, a liquid column guide unit connected to the guide unit and having a column of the liquid, and a liquid storage unit connected to the liquid column guide unit and storing the liquid.

A system for controlling the temperature of an engine, which includes at least one cylinder. The system includes a turbocharger and at least one air-nozzle. The turbocharger includes exhaust-gas-inlet-port, an exhaust-gas-outlet-port, an air-inlet-port, a compressed-air-outlet-port, a turbine and a compressor. The exhaust-gas-inlet-port is coupled with the exhaust-gas-outlet of the engine. Exhaust gas from the engine rotates the turbine, which rotates the compressor. The compressor draws air from the air inlet port, compresses the air thereby increasing the pressure thereof, and provides the compressed air to the compressed-air-outlet-port. An inlet of the air-nozzle or nozzles is coupled with the compressed-air-outlet-port. The air-nozzle or nozzles are directed toward a respective one of the at least one cylinder, and directs a flow of air toward the respective one of the at least one cylinder.

A coolant delivery device for an internal combustion engine, in particular for a motor vehicle, includes a pump, a an activatable electric motor, a shut-off valve, a return line, a heating device, and a common module housing. The pump is configured to deliver liquid coolant, and includes a suction port configured to connect to a tank, and a pressure port for the coolant and which is assigned to the engine. The motor is configured to drive the pump. The valve is assigned to the suction port. The return line is configured to connect to the tank, and includes at least one check valve. At least the pump, motor, valve, heating device, and the at least one check valve together form a delivery module and are positioned in the common module housing.

A coolant delivery device for an internal combustion engine, in particular for a motor vehicle, includes a pump, a an activatable electric motor, a shut-off valve, a return line, a heating device, and a common module housing. The pump is configured to deliver liquid coolant, and includes a suction port configured to connect to a tank, and a pressure port for the coolant and which is assigned to the engine. The motor is configured to drive the pump. The valve is assigned to the suction port. The return line is configured to connect to the tank, and includes at least one check valve. At least the pump, motor, valve, heating device, and the at least one check valve together form a delivery module and are positioned in the common module housing.

Systems and methods are provided for cooling an overheated engine using a combination of variable displacement engine (VDE) technology and direct injection technology. In one example, a method may include deactivating a subset of engine cylinders based on an engine temperature and directly injecting liquid fuel into the deactivated cylinders. In this way, an increased thermal conductivity of the liquid fuel compared to air decreases the engine temperature at a faster rate than when air-based engine cooling methods are used, thereby preventing overheating-related engine degradation.

Systems and methods are provided for cooling an overheated engine using a combination of variable displacement engine (VDE) technology and direct injection technology. In one example, a method may include deactivating a subset of engine cylinders based on an engine temperature and directly injecting liquid fuel into the deactivated cylinders. In this way, an increased thermal conductivity of the liquid fuel compared to air decreases the engine temperature at a faster rate than when air-based engine cooling methods are used, thereby preventing overheating-related engine degradation.

The invention relates to a method for sprinkling a heat exchanger of a fuel cell vehicle with a fluid. The heat exchanger comprises a sprinkling surface and at least one group with at least one part surface. All part surfaces of all groups together fully represent the sprinkling surface.

In the method, all part surfaces of the group are sprinkled with the fluid within a sprinkling period and not sprinkled within a drying period.

The invention also relates to a sprinkling system for carrying out the method.

The invention relates to a method for sprinkling a heat exchanger of a fuel cell vehicle with a fluid. The heat exchanger comprises a sprinkling surface and at least one group with at least one part surface. All part surfaces of all groups together fully represent the sprinkling surface.

In the method, all part surfaces of the group are sprinkled with the fluid within a sprinkling period and not sprinkled within a drying period.

The invention also relates to a sprinkling system for carrying out the method.

An evaporative cooling system for a radiator and method for retrofitting an existing radiator with an evaporative cooling system is provided. The cooling system includes at least one spray nozzle configured to be connected to the radiator upstream of a radiator core and configured to distribute a mist of water to the radiator core; a water source configured to hold water for conveyance to the at least one spray nozzle; and a conduit assembly for conveying water from the water source to the at least one spray nozzle. The evaporative cooling system provides a quick and inexpensive solution for cooling radiators in situations where short-term extreme temperature events occur.