An exemplary pump condition response method includes, in response to a pump condition, operating an engine to discontinue or prevent a first stop-start cycle during a drive cycle. The method permitting a second stop-start cycle during the drive cycle.

An exemplary pump condition response method includes, in response to a pump condition, operating an engine to discontinue or prevent a first stop-start cycle during a drive cycle. The method permitting a second stop-start cycle during the drive cycle.

In a host controller included in a vehicle control apparatus, a generator-torque-command generating unit monitors an abnormal operation of the engine on the basis of an engine power generation command and a detection signal of a rotating speed detector, switches, when the abnormal operation of the engine is detected, a generator torque command to the lowest value of a torque command value for abnormal time set in advance as the generator torque command, thereafter, gradually increases the generator torque command, and, after recording, as a torque limit value, the magnitude of the generator torque command (a torque command value for abnormal time 3) at the time when the abnormal operation of the engine is detected again, switches the generator torque command to a torque command value for abnormal time (a torque command value for abnormal time 2) having a value smaller than the torque limit value.

In a host controller included in a vehicle control apparatus, a generator-torque-command generating unit monitors an abnormal operation of the engine on the basis of an engine power generation command and a detection signal of a rotating speed detector, switches, when the abnormal operation of the engine is detected, a generator torque command to the lowest value of a torque command value for abnormal time set in advance as the generator torque command, thereafter, gradually increases the generator torque command, and, after recording, as a torque limit value, the magnitude of the generator torque command (a torque command value for abnormal time 3) at the time when the abnormal operation of the engine is detected again, switches the generator torque command to a torque command value for abnormal time (a torque command value for abnormal time 2) having a value smaller than the torque limit value.

A system and method for controlling an exhaust gas recirculation (EGR) system in a hybrid vehicle using an intrusive monitor include adjusting EGR flow through an EGR valve based on an average pressure difference between pressure measured from a manifold absolute pressure (MAP) sensor and inferred pressure determined from mass air flow (MAF) into an intake of an engine when engine speed, throttle and camshaft timing position change is below a corresponding threshold. The measured pressure and inferred pressure are determined when the EGR valve is in a closed position and an open position.

A system and method for controlling an exhaust gas recirculation (EGR) system in a hybrid vehicle using an intrusive monitor include adjusting EGR flow through an EGR valve based on an average pressure difference between pressure measured from a manifold absolute pressure (MAP) sensor and inferred pressure determined from mass air flow (MAF) into an intake of an engine when engine speed, throttle and camshaft timing position change is below a corresponding threshold. The measured pressure and inferred pressure are determined when the EGR valve is in a closed position and an open position.

An engine electronic control unit of a hybrid vehicle is configured to execute in-abnormality starting control for starting an engine when the engine is cranked in a state where abnormality occurs to communication between the engine electronic control unit and a hybrid electronic control unit. The hybrid electronic control unit is configured to execute in-abnormality cranking control for controlling the first motor such that the engine is cranked when the abnormality occurs to the communication between the engine electronic control unit and the hybrid electronic control unit. In addition, the hybrid electronic control unit is configured to execute in-abnormality electric travel control for controlling the second motor such that the hybrid vehicle travels only by power from the second motor when the in-abnormality cranking control is executed but the engine is not started.

An engine electronic control unit of a hybrid vehicle is configured to execute in-abnormality starting control for starting an engine when the engine is cranked in a state where abnormality occurs to communication between the engine electronic control unit and a hybrid electronic control unit. The hybrid electronic control unit is configured to execute in-abnormality cranking control for controlling the first motor such that the engine is cranked when the abnormality occurs to the communication between the engine electronic control unit and the hybrid electronic control unit. In addition, the hybrid electronic control unit is configured to execute in-abnormality electric travel control for controlling the second motor such that the hybrid vehicle travels only by power from the second motor when the in-abnormality cranking control is executed but the engine is not started.

A hybrid electric vehicle (HEV) comprises an engine and at least one electric machine. The vehicle is operable in an electric vehicle (EV) mode in which the electric machine develops torque to drive the vehicle whilst the engine is switched off. In an embodiment, the vehicle is operable when in EV mode automatically to cause engine turnover without starting the engine when a prescribed one or more conditions are met.

A hybrid electric vehicle (HEV) comprises an engine and at least one electric machine. The vehicle is operable in an electric vehicle (EV) mode in which the electric machine develops torque to drive the vehicle whilst the engine is switched off. In an embodiment, the vehicle is operable when in EV mode automatically to cause engine turnover without starting the engine when a prescribed one or more conditions are met.