摘要:
An intake air-flow rate detecting apparatus of an internal combustion engine according to the present invention has a thermal air-flow sensor for detecting an intake air-flow rate of the internal combustion engine, and a response lag compensator for compensating for a response lag of the air-flow sensor, using a first-order lag element concerning a heat release amount in the air-flow sensor. Since the response lag process is carried out on the dimension of the heat release amount, the response lag of the air-flow sensor can be compensated for with accuracy and the response lag of the thermal air-flow sensor can be compensated for with high accuracy.
摘要:
In an internal combustion engine wherein a valve timing can be changed in at least two stages and wherein an exhaust gas recirculation passage provided with a control valve is connected to an intake pipe downstream of a throttle valve, there is provided an intake air amount estimation apparatus that estimates, on the basis of an intake pipe pressure, an amount of intake air drawn via the throttle valve. An amount of recirculated exhaust gas flowing past the control valve having a specific opening degree based on an intake pipe pressure (Pm1, Pm2) in the case of the first valve timing is calculated as an intake exhaust gas amount (D1, D2). On the assumption that this intake exhaust gas amount remains unchanged irrespective of a valve timing, an intake air amount in the case of the second valve timing is calculated.
摘要:
In an internal combustion engine, at least one of the pressure and temperature in an intake passage (13) downstream of a throttle valve (18) is calculated using an expression of a relationship established based on the law of conservation of mass among an amount of air passing the throttle valve and flowing into the intake passage, an amount of exhaust gas passing an exhaust gas flow control valve (22) and flowing into the intake passage, and an amount of gas flowing from the intake passage into a cylinder (5) of the engine, and an expression of a relationship established based on the law of conservation of energy among an amount of energy of the air passing the throttle valve and flowing into the intake passage, an amount of energy of the exhaust gas passing the exhaust gas flow control valve and flowing into the intake passage, and an amount of energy of the gas flowing from the intake passage into the cylinder of the engine.
摘要:
A cylinder inflow exhaust gas amount calculation system of an internal combustion engine is provided with an intake passage, an exhaust passage, an exhaust gas recirculation passage connecting the intake passage and exhaust passage, and an exhaust gas flow rate control valve arranged in the exhaust gas recirculation passage for controlling the flow rate of the exhaust gas flowing in the exhaust gas recirculation passage, the system calculating an amount of passage exhaust gas defined as an amount of exhaust gas passing through an exhaust gas flow rate control valve, utilizing a parameter changing said amount of passage exhaust gas and the system calculating an amount of cylinder inflow exhaust gas defined as an amount of exhaust gas flowing into a cylinder, utilizing said calculated amount of passage exhaust gas.
摘要:
In an internal combustion engine, at least one of the pressure and temperature in an intake passage (13) downstream of a throttle valve (18) is calculated using an expression of a relationship established based on the law of conservation of mass among an amount of air passing the throttle valve and flowing into the intake passage, an amount of exhaust gas passing an exhaust gas flow control valve (22) and flowing into the intake passage, and an amount of gas flowing from the intake passage into a cylinder (5) of the engine, and an expression of a relationship established based on the law of conservation of energy among an amount of energy of the air passing the throttle valve and flowing into the intake passage, an amount of energy of the exhaust gas passing the exhaust gas flow control valve and flowing into the intake passage, and an amount of energy of the gas flowing from the intake passage into the cylinder of the engine.