摘要:
An electronic control unit increases the maximum lift amount or the working angle of an intake valve if it is determined that the operation for stopping an engine is performed. The electronic control unit stops fuel injection or ignition before increasing the maximum lift amount or the working angle.
摘要:
If it is determined that an engine has been started, an engine coolant temperature is detected. If the engine coolant temperature is equal to or lower than a threshold value, the catalyst quick warm-up control is started to retard ignition timing, and a signal indicating a command to increase an operate angle is transmitted to a VVLA controller. When a VVT hydraulic pressure is increased to a predetermined value, a signal indicating a command to decrease the operate angle is transmitted to the VVLA controller, and a signal indicating a command to advance open timing of an intake valve is transmitted to a VVT controller so that the open timing of the intake valve is not changed. If the engine coolant temperature is equal to or higher than a threshold value, the catalyst quick warm-up control ends, and the ignition timing is returned to normal timing.
摘要:
An electronic control unit increases the maximum lift amount or the working angle of an intake valve if it is determined that the operation for stopping an engine is performed. The electronic control unit stops fuel injection or ignition before increasing the maximum lift amount or the working angle.
摘要:
If it is determined that an engine has been started, an engine coolant temperature is detected. If the engine coolant temperature is equal to or lower than a threshold value, the catalyst quick warm-up control is started to retard ignition timing, and a signal indicating a command to increase an operate angle is transmitted to a VVLA controller. When a VVT hydraulic pressure is increased to a predetermined value, a signal indicating a command to decrease the operate angle is transmitted to the VVLA controller, and a signal indicating a command to advance open timing of an intake valve is transmitted to a VVT controller so that the open timing of the intake valve is not changed. If the engine coolant temperature is equal to or higher than a threshold value, the catalyst quick warm-up control ends, and the ignition timing is returned to normal timing.
摘要:
A starting control apparatus of the present invention prevents a variation in output torque of an internal combustion engine at a time of starting the internal combustion engine, while effectively reducing an emission. In response to a requirement for starting an engine (150) (S212), a controller (180) calculates an idle revolving speed Ni that is a target at a starting time and a required amount of the air Qi for maintaining the idle revolving speed Ni (S213). The idle revolving speed Ni and the required amount of the air Qi are respectively set equal to a target engine speed Ne* and a target amount of air intake Q* (S214). The controller (180) sets torque command values Tm1* and Tm2* of first and second motors MG1 and MG2, in order to enable the motors MG1 and MG2 to generate a cranking torque required for revolving the engine (150) at the target revolving speed Ne* (S216 and S218), and controls the first motor MG1 and the second motor MG2 (S220 and S222). The controller (180) subsequently adjusts the amount of air intake Q into the engine (150) to the target amount of air intake Q* by idle speed control (S224). After the revolving speed Ne of the engine (150) and the amount of air intake Q are stabilized, the controller (180) starts fuel injection control and ignition timing control (S230) to start the engine (150). The amount of fuel injection and the ignition timing are determined according to the target engine speed Ne* and the target amount of air intake Q*.
摘要:
An controller detects a change in a load generation state of an accessory device that generates a load on the internal combustion engine during operation, and the controller in turn controls a variable valve mechanism to change at least one of an operation angle and a valve lift of an intake valve of the internal combustion engine, as well as changing an amount of an intake air drawn into the internal combustion engine, in response to the detected change in the load generation state of the accessory device.
摘要:
It is highly likely that fuel is already adhered to the inside wall surface of the combustion chamber at the beginning of engine startup when it is estimated that the temperature at the beginning of engine stop of the most recent engine operation is low when the engine is restarted. Under these conditions, a fuel injection quantity is reduced or an intake air quantity is increased when the engine is restarted. Therefore, even if the adhered fuel vaporizes when the engine is restarted, the air-fuel ratio will not become excessively rich as a result.
摘要:
The technique of the present invention reduces or even omits potential shocks and vibrations arising due to the coupling action of a coupling mechanism at the time of starting an internal combustion engine, and ensures a quick restart of the internal combustion engine. In a vehicle with an idling stop control apparatus of the present invention mounted thereon, a control unit inputs an inverted phase current Eon, which is determined according to the energy absorbing state of a transmission belt, into an auxiliary machinery driving electric motor, so as to brake rotations of the auxiliary machinery driving electric motor. After the input of the inverted phase current Eon into the auxiliary machinery driving electric motor, the control unit couples an electromagnetic clutch to link a crankshaft of the internal combustion engine with the auxiliary machinery driving electric motor. The value of the inverted phase current Eon is varied according to the energy absorbing state of the transmission belt. The braking force of the auxiliary machinery driving electric motor is thus varied according to the energy absorbing state of the transmission belt.
摘要:
In an internal combustion engine where the ignition timing is retarded to avoid knocking and an overtemperature of the engine, a fuel incremental amount is calculated by using a curvilinear function having a positive secondary differential value with respect to the retard amount of the ignition timing.