CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE

摘要

A control system of an internal combustion engine is provided. The engine includes a turbocharger, a bypass passage, a wastegate valve, an exhaust-gas recirculation passage, and an exhaust-gas recirculation valve. The control system includes a valve closing detector and an electronic control unit. The valve closing detector is configured to detect start of an operation to close the wastegate valve. The electronic control unit is configured to start an operation to close the exhaust-gas recirculation valve when the start of the operation to close the wastegate valve is detected by the valve closing detector, such that both of the wastegate valve and the exhaust-gas recirculation valve are closed during supercharging by the turbocharger.

主权项

1. A control system of an internal combustion engine, the internal combustion engine including a turbocharger, a bypass passage, a wastegate valve, an exhaust-gas recirculation passage, and an exhaust-gas recirculation valve, the turbocharger including an exhaust-gas turbine provided in an exhaust passage of the internal combustion engine, the bypass passage communicating a portion of the exhaust passage located upstream of the exhaust-gas turbine in a direction of exhaust gas flow with a portion of the exhaust passage located downstream of the exhaust-gas turbine, the wastegate valve being configured to open and close the bypass passage, the exhaust-gas recirculation passage communicating the exhaust passage with an intake passage of the internal combustion engine, the exhaust-gas recirculation valve being configured to open and close the exhaust-gas recirculation passage, the control system comprising:
a valve closing detector configured to detect start of an operation to close the wastegate valve, and an electronic control unit configured to start an operation to close the exhaust-gas recirculation valve when the start of the operation to close the wastegate valve is detected by the valve closing detector, such that both of the wastegate valve and the exhaust-gas recirculation valve are closed during supercharging by the turbocharger.