A split cycle internal combustion engine comprising a compression cylinder accommodating a compression piston; a combustion cylinder accommodating a combustion piston; a crossover passage between the compression cylinder and the combustion cylinder arranged to provide working fluid to the combustion cylinder; a controller arranged to determine a peak temperature of combustion in the combustion cylinder based on a received indication of a peak temperature of combustion in the combustion cylinder; and a coolant system arranged to regulate a temperature of the working fluid supplied to the combustion cylinder; wherein, in response to determining that the peak temperature of combustion exceeds a selected threshold, the controller is configured to control the coolant system to regulate the temperature of the working fluid supplied to the combustion cylinder so that a peak temperature of combustion in the combustion cylinder is less than the selected threshold.

An intake air circuit is structured to transmit intake air from a turbocharger compressor to an intake manifold of an engine. A charge air cooler (CAC), a bypass line, and a bypass heater are each positioned along the intake air circuit in parallel with each other. A first control valve is structured to controllably divert the intake air around the CAC. A second control valve is structured to controllably divert the intake air around at least one of the bypass line and the bypass heater. A controller operatively coupled to each of the engine, and the first and second control valves is structured to control each of the first and second control valves to cause the intake air to flow along a determined desired flow path based on each of measured ambient temperature and measured engine load.

A charge air cooler, e.g., as used with a supercharger having meshing rotors in sealing contact with a housing, the housing having an inlet port to admit air into the meshing rotors and the housing having an outlet port to expel air from the meshing rotors, the charge air cooler having an inlet-side core for transmitting the flow of pressurized air, and an outlet-side core receiving the flow of pressurized air transmitted from the inlet-side core and further transmitting the flow of pressurized air, each core having coolant conduits and fins joined to the coolant conduits for contact with the flow of pressurized air, the fins being arranged with a predetermined density, wherein the inlet-side core fin density is lower than the outlet-side core fin density, whereby the inlet-side core presents less resistance to the flow of pressurized air than the outlet-side core and the outlet-side core presents greater surface area for heat conductance from the flow of pressurized air than the inlet-side core. Charge air coolers with this configuration provide improved pressure and temperature characteristics in a supercharger's flow of pressurized air to an engine.

Disclosed is a transport refrigeration unit (TRU) having: an engine configured to power a refrigeration system of the TRU, the engine including an air intake, the engine within an engine compartment of the TRU; an air management valve (AMV) fluidly coupled to the air intake; a first duct fluidly coupled to the AMV and including a first inlet within the engine compartment; and a second duct fluidly coupled to the AMV and including a second inlet that is exterior to the engine compartment and is configured to receive atmospheric air; wherein: the AMV is configured to modulate air into the engine from the first duct and the second duct, when a temperature of air within the AMV is above the first threshold and the temperature of air within the second duct is below the first threshold, to lower the temperature of air entering the engine to below the first threshold.

An engine includes an EGR device and a water-cooled heat exchanger. The water-cooled heat exchanger is provided on a downstream side of an EGR gas-introduction portion of an intake passage into which EGR gas is to be introduced and exchanges heat with gas flowing in the intake passage. A control device is programmed to execute condensed water-suppression control that supplies coolant having a temperature higher than the temperature of the gas heat-exchanged in the water-cooled heat exchanger to the water-cooled heat exchanger while a hybrid vehicle is traveling in a state in which the engine is stopped.

Present disclosure relates to air cooling chamber assembly. The air cooling chamber assembly includes: an air intake duct receiving ambient air outside of an internal combustion engine, an air cooling chamber cooling the ambient air received from the air intake duct to generate cooled air, and an air output duct providing the cooled air generated from the air cooling chamber to the internal combustion engine. The air cooling chamber assembly is connected to an air intake of the internal combustion engine to cool the ambient air to generate the cooled air prior to entering the internal combustion engine, and to provide the cooled air generated to the air intake of the internal combustion engine. The cooled air from air cooling chamber contains increased amount of oxygen molecules, and increased amount of oxygen molecules in the cooled air improves fuel efficiency and reduces greenhouse gas emission of the internal combustion engine.

An intake-air temperature controlling device is provided, which includes an engine body, an intake passage, a supercharger, a first passage, a second passage, an intake air flow rate adjuster, an intercooler, a pump, and a controller. The controller outputs a control signal to the pump so that coolant is supplied to the intercooler in a first operating range in which the intake air flow rate adjuster at least partially opens the first passage to supply intake air boosted by the supercharger to the engine body, and outputs a control signal to the pump so that the coolant is supplied to the intercooler also in a second operating range in which an engine load is below a given load, and the intake air flow rate adjuster opens the second passage and closes the first passage to supply the intake air to the engine body in a non-boosted state.

The invention provides an internal combustion engine control device capable of performing a stable combustion at a lean combustion limit. In an internal combustion engine control device that controls an internal combustion engine provided with an ignition device igniting an air-fuel mixture formed inside a combustion chamber, an intake side air temperature of the internal combustion engine is controlled in response to a compression ratio of the combustion chamber.

Methods and systems for an engine intake system. In one example, a system comprises a first charge air cooler arranged upstream of a second charge air cooler. The first charge air cooler is configured to provide thermal transfer between a compressed charge air and a fresh intake air.

An air cooling system for a vehicle engine includes an air intake configured to receive intake air for delivery to the engine, a first coolant loop thermally coupled to the air intake to provide cooling to the intake air, and a second coolant loop thermally coupled to the air intake to provide further cooling to the intake air. The first and second coolant loops are separate loops using a common condenser