An intake system of an engine mounted on a vehicle where a cabin is air-conditioned by an air conditioner, is provided. A heat exchanger of an evaporator of the air conditioner is divided into a first heat exchanger and a second heat exchanger that are mutually independent, and an air passage includes a first division passage and a second division passage. The intake system cools intake air utilizing a part of the air conditioner, and includes a connecting passage that guides first air cooled by passing through the first heat exchanger, a passage switch, and a controller. When the controller determines that a cooling demand for the intake air exists, it controls the first air to flow into an intake passage through the connecting passage, and when the controller determines that there is no cooling demand, it controls the first air to flow into the first division passage.

The invention relates to an engine having prechamber ignition, in particular a gas engine, that comprises a main combustion space in a cylinder of the engine for combusting an air-fuel mixture and a prechamber having an ignition device arranged therein and a fuel injector arranged therein, wherein the prechamber has at least one transfer port that fluidically connects the prechamber to the main combustion space. The engine is characterized in that the fuel injector arranged in the prechamber is the only fuel injector via which fuel can be introduced into the associated main combustion space.

The invention relates to an engine having prechamber ignition, in particular a gas engine, that comprises a main combustion space in a cylinder of the engine for combusting an air-fuel mixture and a prechamber having an ignition device arranged therein and a fuel injector arranged therein, wherein the prechamber has at least one transfer port that fluidically connects the prechamber to the main combustion space. The engine is characterized in that the fuel injector arranged in the prechamber is the only fuel injector via which fuel can be introduced into the associated main combustion space.

A battery temperature adjusting device for a vehicle on which a battery is mounted, the battery being a lithium ion battery disposed near a powertrain unit inside an engine bay, is provided. The device includes a first air duct provided to an intake passage configured to lead intake air to a combustion chamber of an engine, a second air duct provided to the intake passage and provided with an intake opening that opens toward a space between the powertrain unit and the battery, an intake-air-amount adjusting part, and a controller configured to acquire an ambient temperature of the powertrain unit. The controller increases a ratio of the second intake air amount relative to the sum of the first intake air amount and the second intake air amount, when the ambient temperature exceeds a first threshold temperature, compared with when the ambient temperature is below the first threshold temperature.

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.

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.

The intake air cooling device 100A constitutes a heat exchange device that performs heat exchange of the intake air of the internal combustion engine 6. The intake air cooling device 100A includes the heat exchange part 1A configured to perform heat exchange between the cooling liquid W that is introduced thereto and the intake air that is passing therethrough, and the intake air control valve 2 configured to perform control of the intake air that passes through the heat exchange part 1A. The cooling liquid introduction port 13 of the heat exchange part 1A and the intake air control valve 2 are provided at positions opposing each other with respect to the heat exchange part 1A.

An engine includes a block defining cylinders, a charge-air cooler, and an intake manifold configured to receive air from the charge-air cooler and convey the air to the cylinders. The intake manifold includes an inlet connected in fluid communication with the charge-air cooler, a plurality of runners each associated with one of the cylinders, and a wedge disposed in an air path between the inlet and the runners with a leading edge of the wedge facing the inlet. The wedge is configured to deflect water, condensed in the charge-air cooler, to distribute the water among the runners.

An engine includes a block defining cylinders, a charge-air cooler, and an intake manifold configured to receive air from the charge-air cooler and convey the air to the cylinders. The intake manifold includes an inlet connected in fluid communication with the charge-air cooler, a plurality of runners each associated with one of the cylinders, and a wedge disposed in an air path between the inlet and the runners with a leading edge of the wedge facing the inlet. The wedge is configured to deflect water, condensed in the charge-air cooler, to distribute the water among the runners.

Systems, methods and apparatus are disclosed for providing or maintaining a target surge margin at the compressor during steady state engine operating conditions and to avoid compressor surge during transients by controlling a compressor recirculation valve position to a commanded position. The estimated surge margin can be determined in response to the measured pressure ratio across the compressor, an estimated compressor flow, and a compressor map for the compressor.