Intake controller of internal combustion engine

An intake controller for an internal combustion engine, comprising:

• a turbocharger having a compressor for sucking in and pressurizing fresh air to supply the internal combustion engine therewith, and an exhaust turbine for driving the compressor;
• a bypass line through which an outlet passage of the compressor and an inlet passage of the exhaust turbine communicate with each other;
• an open-close valve provided in the bypass line;
• an operating condition detecting means for detecting an operating condition of the internal combustion engine based on a rotational speed and fuel injection amount of the internal combustion engine;
• and
• a valve opening and closing controlling means for controlling the open-close valve in an opening direction when it is determined based on a signal from the operating condition detecting means that the operating condition of the internal combustion engine is a state of abrupt deceleration from an intermediate-to-high speed range and an intermediate-to-high load range,
• wherein the valve opening and closing controlling means determines that the operating condition of the internal combustion engine is the state of abrupt deceleration when the operating condition of the internal combustion engine is shifted from the intermediate-to-high speed range and the intermediate-to-high load range to a state where the fuel injection amount is lower than a fuel injection amount required for autonomous operation of the internal combustion engine based on a signal from the operating condition detecting means.

An intake controller for an internal combustion engine, comprising:

• a turbocharger having a compressor for sucking in and pressurizing fresh air to supply the internal combustion engine therewith, and an exhaust turbine for driving the compressor;
• an exhaust gas recirculation line for extracting a part of exhaust gas from an inlet passage side of the exhaust turbine to recirculate the extracted exhaust gas to an outlet passage side of the compressor;
• an open-close valve provided in the exhaust gas recirculation line;
• a bypass line through which an outlet passage of the compressor and an inlet passage of the exhaust turbine communicate with each other;
• another open-close valve provided in the bypass line;
• an operating condition detecting means for detecting an operating condition of the internal combustion engine based on a rotational speed and fuel injection amount of the internal combustion engine;
• and
• a valve opening and closing controlling means for controlling both of the open-close valves in an opening direction when it is determined based on a signal from the operating condition detecting means that the operating condition of the internal combustion engine is a condition of abrupt deceleration from an intermediate-to-high speed range and an intermediate-to-high load range,
• wherein the valve opening and closing controlling means determines that the operating condition of the internal combustion engine is the state of abrupt deceleration when the operating condition of the internal combustion engine is shifted from the intermediate-to-high speed range and the intermediate-to-high load range to a state where the fuel injection amount is lower than a fuel injection amount required for autonomous operation of the internal combustion engine based on a signal from the operating condition detecting means.