摘要:
A fuel supply system includes a first non-return valve for a low-pressure delivery connection pipe and a second non-return valve for a pump supply pipe. The former non-return pipe does not allow fuel to flow from the low-pressure delivery pipe to the low-pressure supply pipe. The second non-return valve does not allow fuel to flow from pump supply pipe to the low-pressure supply pipe. Upon determining that air purging is necessary, an engine ECU operates a feed pump for approximately one second and then opens, for dummy injection, an in-cylinder injector and an intake manifold injector.
摘要:
In an engine 5 including an in-cylinder injector, the valve timing of an intake valve is retarded by VVT (Variable Valve Timing) controlled by an engine ECU to decompress in a combustion chamber at engine startup. In accordance with a configuration in which the valve timing of intake valve is advanced in a stepped manner from an initial set value, fuel injection from in-cylinder injector is inhibited during the time when the advance is equal to or below a predetermined standard value, and fuel injection from in-cylinder injector is allowed when exceeding the predetermined standard value, whereby degradation in the exhaust emission level in accordance with start time decompression control can be suppressed.
摘要:
In an engine 5 including an in-cylinder injector, the valve timing of an intake valve is retarded by VVT (Variable Valve Timing) controlled by an engine ECU to decompress in a combustion chamber at engine startup. In accordance with a configuration in which the valve timing of intake valve is advanced in a stepped manner from an initial set value, fuel injection from in-cylinder injector is inhibited during the time when the advance is equal to or below a predetermined standard value, and fuel injection from in-cylinder injector is allowed when exceeding the predetermined standard value, whereby degradation in the exhaust emission level in accordance with start time decompression control can be suppressed.
摘要:
A fuel supply system includes a first non-return valve for a low-pressure delivery connection pipe and a second non-return valve for a pump supply pipe. The former non-return pipe does not allow fuel to flow from the low-pressure delivery pipe to the low-pressure supply pipe. The second non-return valve does not allow fuel to flow from pump supply pipe to the low-pressure supply pipe. Upon determining that air purging is necessary, an engine ECU operates a feed pump for approximately one second and then opens, for dummy injection, an in-cylinder injector and an intake manifold injector.
摘要:
In a hybrid vehicle 20, when a deceleration demand based on accelerator-off is made in selecting an S position that allows arbitrary selection of shift positions SP1 to SP6, and fuel cut cannot be prohibited from a state of a battery 50, an engine 22 and motors MG1 and MG2 are controlled so that a driving force based on a torque demand Tr* is outputted with the fuel cut (Steps S410, S420, S360 to S400). When the deceleration demand based on the accelerator-off is made in selecting the S position, and the fuel cut can be prohibited from the state of the battery 50, the engine 22 and the motors MG1 and MG2 are controlled so that the engine 22 substantially performs self-sustaining operation at a target rotation speed Ne0 and a driving force based on the torque demand Tr* is outputted (Steps S340 to S400).
摘要:
In a hybrid vehicle 20, when a deceleration demand based on accelerator-off is made in selecting an S position that allows arbitrary selection of shift positions SP1 to SP6, and fuel cut cannot be prohibited from a state of a battery 50, an engine 22 and motors MG1 and MG2 are controlled so that a driving force based on a torque demand Tr* is outputted with the fuel cut (Steps S410, S420, S360 to S400). When the deceleration demand based on the accelerator-off is made in selecting the S position, and the fuel cut can be prohibited from the state of the battery 50, the engine 22 and the motors MG1 and MG2 are controlled so that the engine 22 substantially performs self-sustaining operation at a target rotation speed Ne0 and a driving force based on the torque demand Tr* is outputted (Steps S340 to S400).
摘要:
When an engine power demand Pe* is not greater than a maximum power Pemax, the drive control sets a target rotation speed Ne* and a target torque Te* of an engine according to a reference operation curve obtained in air-fuel ratio control with a stoichiometric air-fuel ratio (step S125). When the engine power demand Pe* exceeds the maximum power Pemax, on the other hand, upon failure of a preset fuel increase prohibition condition, the drive control sets the target rotation speed Ne* to a maximum rotation speed Nemax (step S140) and sets a target air-fuel ratio used for the air-fuel ratio control of the engine to a rich air-fuel ratio based on the engine power demand Pe* (step S150).
摘要:
In a hybrid vehicle of the invention, the control procedure corrects an idling intake air flow Qidl to enable an engine immediately after its start to generate an output power Pe that is substantially equivalent to an engine power demand Pe*. After the correction, the control procedure controls the engine to have an intake air flow Qe with reflection of an intake air flow correction value Qec and controls a motor MG1 to generate electric power by using the output power Pe of the engine and to charge a battery with the generated electric power within an input limit Win of the battery. The control of the invention ensures that the output power Pe of the engine does not exceed the engine power demand Pe* in restriction of the charge level of the battery. This arrangement effectively prevents the state of charge SOC of the battery, which is charged with the electric power generated by the motor MG1, from exceeding the input limit Win.
摘要:
In a hybrid vehicle of the invention, in the event of specification that an exhaust treatment catalyst is in a preset adequate state at step S112, combustion control of an engine starts after a decrease of an intake pipe pressure P to a preset reference negative pressure Pref and reduction of an intake air flow into a cylinder of the engine by engine motoring. In the event of specification that the exhaust treatment catalyst is not in the preset adequate state but in an inadequate state at step S112, on the other hand, the combustion control of the engine immediately starts, prior to the decrease of the intake pipe pressure P to the preset reference negative pressure Pref. The hybrid vehicle of the invention allows an early start of the combustion control in a lower catalyst temperature condition that lowers the catalytic conversion power of the exhaust treatment catalyst and in a higher catalyst temperature condition that causes accelerated deterioration of the exhaust treatment catalyst in exposure to the air. The early start of the combustion control effectively reduces the potential shocks on a start of the engine, while preventing the potential troubles, for example, the worsened emission and the accelerated deterioration of the exhaust treatment catalyst, arising in the course of engine motoring due to the inadequate state of the exhaust treatment catalyst.
摘要:
In a hybrid vehicle of the invention, the control procedure corrects an idling intake air flow Qidl to enable an engine immediately after its start to generate an output power Pe that is substantially equivalent to an engine power demand Pe*. After the correction, the control procedure controls the engine to have an intake air flow Qe with reflection of an intake air flow correction value Qec and controls a motor MG1 to generate electric power by using the output power Pe of the engine and to charge a battery with the generated electric power within an input limit Win of the battery. The control of the invention ensures that the output power Pe of the engine does not exceed the engine power demand Pe* in restriction of the charge level of the battery. This arrangement effectively prevents the state of charge SOC of the battery, which is charged with the electric power generated by the motor MG1, from exceeding the input limit Win.