摘要:
In an engine mounted on a hybrid vehicle, even in an atmosphere that readily cools down a catalyst by relatively low-temperature gaseous exhausts, for example, under a fuel cut control, the structure of the invention quickly warms up the catalyst and maintains a conversion efficiency of the gaseous exhausts at a high level. When it is determined that an engine is in operation and the fuel cut control is being performed, a reflux valve is turned on to reflux the gaseous exhausts into an intake conduit. This control procedure enables the relatively low-temperature gaseous exhausts to be refluxed to the intake conduit, instead of flowing into the catalyst, thereby preventing the catalyst from being cooled down.
摘要:
Disclosed is an internal combustion engine control device capable of accurately achieving a target torque. At time t11, which precedes an exhaust stroke, a target throttle angle is calculated in accordance with the target torque. During a period between time t12 and time t13, the actual throttle angle is changed to match the target throttle angle calculated at time t11. At time t14 during a subsequent intake stroke, the target torque decreases. At time t18 during a subsequent compression stroke, a target ignition timing is calculated in accordance with the latest (decreased) target torque.
摘要:
An inter-bank variation detection device of an internal combustion engine provided with a valve opening characteristic setting means (57) for changing the valve opening characteristic of an intake valve (9) for each of the cylinders (#1 to #4) or each of the bank (BL, BR); an indicator detecting means for detecting indicators of the state of combustion for each bank at the time of a first valve opening characteristic set by the valve opening characteristic setting means and the time of a second valve opening characteristic smaller than the first valve opening characteristic; a fuel injection amount variation detecting means (27) for detecting variation of the fuel injection amount for each bank by using the indicator (Xfn) detected by the indicator detecting means at the time of the first valve opening characteristic; and a valve opening characteristic variation detecting means (27) for detecting variation of the valve opening characteristic for each bank by using the indicator (Xsn) detected by the indicator detecting means at the time of the second valve opening characteristic and the variation of the fuel injection amount detected by the fuel injection amount variation detecting means is provided. It is also possible to change the valve opening characteristic of the intake valve by the valve opening characteristic setting means so that the variation of valve opening characteristic for each cylinder or each bank is eliminated.
摘要:
There is provided a device for supplying secondary air, which comprises a secondary air passage for supplying secondary air, to an exhaust passage of an engine, upstream of an exhaust purification device provided in the exhaust passage, a pump provided in the secondary air passage for supplying a secondary air, a battery used for driving the pump, at least one opening-closing device for opening and closing the secondary air passage, and a pressure sensor provided between the pump and the opening-closing device for detecting a pressure in the secondary air passage. A malfunction of at least one of the pump and the opening-closing device is detected on the basis of at least one of the pressures detected when the secondary air passage is opens and when the secondary air passage is closed. The malfunction detection is ceased when the voltage of the battery changes by a value larger than a predetermined value when the pressure sensor detects a malfunction of the pressure variation in the secondary air passage for detecting a malfunction of at least one of the pump and the opening-closing device.
摘要:
There is provided a device for supplying secondary air, which comprises a secondary air passage for supplying secondary air, to an exhaust passage of an engine, upstream of an exhaust purification device provided in the exhaust passage, a pump provided in the secondary air passage for supplying a secondary air, a battery used for driving the pump, at least one opening-closing device for opening and closing the secondary air passage, and a pressure sensor provided between the pump and the opening-closing device for detecting a pressure in the secondary air passage. A malfunction of at least one of the pump and the opening-closing device is detected on the basis of at least one of the pressures detected when the secondary air passage is opens and when the secondary air passage is closed. The malfunction detection is ceased when the voltage of the battery changes by a value larger than a predetermined value when the pressure sensor detects a malfunction of the pressure variation in the secondary air passage for detecting a malfunction of at least one of the pump and the opening-closing device.
摘要:
A fuel injection timing control device for an internal combustion engine. The device comprises a fuel injector for injecting fuel into the intake port of an engine cylinder and an fuel injection end-timing control system for controlling the fuel injection end-timing of the fuel injector so as to advance gradually, from a first crank angle in the intake stroke to a second crank angle before the intake stroke, according to the engine operating condition. Accordingly, when the fuel injection timing is changed, the amount of fuel which sticks or adheres in the intake port is gradually increased by a small amount, at each fuel injection, so that the air-fuel ratio of the mixture does not become so lean the drivability of the vehicle is deteriorated.
摘要:
In an engine mounted on a hybrid vehicle, even in an atmosphere that readily cools down a catalyst by relatively low-temperature gaseous exhausts, for example, under a fuel cut control, the structure of the invention quickly warms up the catalyst and maintains a conversion efficiency of the gaseous exhausts at a high level. When it is determined that an engine 10 is in operation and the fuel cut control is being performed, a reflux valve is turned on to reflux the gaseous exhausts into an intake conduit. This control procedure enables the relatively low-temperature gaseous exhausts to be refluxed to the intake conduit, instead of flowing into the catalyst, thereby preventing the catalyst from being cooled down.
摘要:
An exhaust gas purifying apparatus adopted to an internal combustion engine provided with air-fuel ratio learning means for learning a primary air-fuel ratio given in the form of a mass ratio between air and fuel introduced into a combustion chamber, comprises an exhaust gas purifying catalyst provided in an exhaust gas passage of the engine and a catalyst activating means for supplying secondary air to an upstream of the exhaust gas purifying catalyst and increasing the quantity of fuel supplied to the engine to activate the exhaust gas purifying catalyst. The apparatus further comprises air-fuel ratio learning determining means for, when the internal combustion engine is started, determining whether or not learning of the primary air-fuel ratio by the air-fuel ratio learning means is completed; and activation control means for, when determined that the learning of the primary air-fuel ratio is not completed, prohibiting supply of the secondary air and increase of the quantity of fuel by the catalyst activation means.
摘要:
An exhaust gas purifying apparatus adopted to an internal combustion engine provided with air-fuel ratio learning means for learning a primary air-fuel ratio given in the form of a mass ratio between air and fuel introduced into a combustion chamber, comprises an exhaust gas purifying catalyst provided in an exhaust gas passage of the engine and a catalyst activating means for supplying secondary air to an upstream of the exhaust gas purifying catalyst and increasing the quantity of fuel supplied to the engine to activate the exhaust gas purifying catalyst. The apparatus further comprises air-fuel ratio learning determining means for, when the internal combustion engine is started, determining whether or not learning of the primary air-fuel ratio by the air-fuel ratio learning means is completed; and activation control means for, when determined that the learning of the primary air-fuel ratio is not completed, prohibiting supply of the secondary air and increase of the quantity of fuel by the catalyst activation means.
摘要:
An engine control apparatus for a hybrid vehicle reduces a shock and improves the fuel consumption rate when an engine is under a fuel cut control at the time of reducing a speed through an operation of a brake pedal. In case that all conditions are fulfilled, that is, the fuel cut control, the speed reduction of not less than a predetermined level, and the non-full charge state of a battery, the program locks an intake valve and an exhaust valve in full open position and carries out a regenerative control with a generator 14. This procedure enables a cylinder to be connected with an intake air conduit and an exhaust conduit via the passages of the intake valve and the exhaust valve, thereby preventing compression of a gas in the cylinder and effectively reducing friction.