摘要:
A supercharging system comprising a pressure wave supercharger which supercharges an internal combustion engine by increasing a pressure of gas in a cell using a pressure wave of exhaust gas and discharging from an intake gas outlet port to an intake gas passage the gas pressurized further comprises a first motor which rotates a rotor, and a valve plate and a second motor capable of changing a position of the intake gas outlet port with respect to an exhaust gas inlet port. The motors are controlled so as to change a rotation number of the rotor and the position of the intake gas outlet port with respect to the exhaust gas inlet port based on a quantity of flow of exhaust gas to be recirculated to the intake gas passage.
摘要:
In a method for controlling operation of an engine in which an EGR system is incorporated therein, when the engine is in a pressure-accumulable operational state in which EGR gas can be pressure-accumulated in an EGR passage between an EGR control valve and an on-off valve, these valves are brought into a full closed state, respectively. In addition, when an intake pressure transmitted from an air intake passage to the engine becomes more than or equal to a target value of the intake pressure set based on an operational state of the engine, the on-off valve is switched to a full open state, and then the on-off valve is switched to the full closed state again after elapse of a predetermined time, and high-pressure EGR gas of a low oxygen concentration is temporarily stored in the EGR passage.
摘要:
In a method for controlling operation of an engine in which an EGR system is incorporated therein, when the engine is in a pressure-accumulable operational state in which EGR gas can be pressure-accumulated in an EGR passage between an EGR control valve and an on-off valve, these valves are brought into a full closed state, respectively. In addition, when an intake pressure transmitted from an air intake passage to the engine becomes more than or equal to a target value of the intake pressure set based on an operational state of the engine, the on-off valve is switched to a full open state, and then the on-off valve is switched to the full closed state again after elapse of a predetermined time, and high-pressure EGR gas of a low oxygen concentration is temporarily stored in the EGR passage.
摘要:
The object of the invention is to provide a cooling device for accomplishing both of required engine and compressor cooling degrees. The invention relates to a cooling device for an engine provided with a blowby gas recirculation device (50) and a turbocharger (60), the blowby gas recirculation device recirculating a blowby gas to an intake passage upstream of a compressor of the turbocharger. The cooling device comprises a first cooling device (70) for cooling a body (20) of the engine and a second cooling device (80) for cooling an intake air, separately. The second cooling device cools the compressor (61).
摘要:
The object of the invention is to suppress the generation or accumulation of deposits in a compressor of a turbocharger of an engine provided with a blowby gas recirculation device. The invention relates to a cooling device for the turbocharger (60) of the engine (10) provided with the blowby gas recirculation device (50). The cooling device has a cooled air introduction passage (70). The blowby gas recirculation device introduces a blowby gas to an area upstream of the compressor. The cooled air introduction passage introduces a cooled air to a diffuser passage (64) of the compressor. The cooled air introduction passage introduces the cooled air to the diffuser passage in a direction having an acute angle with respect to a flow direction (IA) of the intake air flowing through the diffuser passage.
摘要:
A supercharging system for an internal combustion engine comprising a turbocharger including a compressor and a turbine, and a pressure wave supercharger performing supercharging of the internal combustion engine by increasing a pressure of gas led into each of cells from an intake gas inlet port using a pressure wave of exhaust gas led into the cell from an exhaust gas inlet port and discharging from an intake gas outlet port to an intake passage the gas pressurized, wherein a case of the pressure wave supercharger is connected to the intake passage upstream of the compressor via the intake gas inlet port, and is connected to the intake passage downstream of the compressor via the intake gas outlet port, and is connected to an exhaust passage downstream of the turbine via the exhaust gas inlet port and an exhaust gas outlet port.
摘要:
In an internal combustion engine provided with a rotary intake control valve, preferable position convergence at the end of inertia supercharging is ensured while avoiding an influence on combustion performance. In an engine provided with an impulse valve, if the implementation of the inertia supercharging is stopped and a request to maintain the impulse valve at a fully-opened position is made, an ECU stops the supply of a braking force to the impulse valve until the rotational phase of the impulse valve enters dead band, and the ECU performs a BRK mode for stopping the impulse valve under the condition that the rotational phase enters the dead band and that the impulse valve is in a deceleration state. At this time, electrification or power distribution for acceleration of the impulse valve during stop control of the impulse valve is forbidden. Moreover, the converging position of the impulse valve by the BRK mode is allowed to deviate in a range with an allowable width set in advance with respect to a target.