Abstract: A hybrid electric vehicle is arranged such that a driving force of an engine and a driving force of an electric motor can be transmitted to driving wheels through a transmission and that the engine and the transmission can be mechanically connected and disconnected by means of a clutch. When an upper limit decelerating torque generable by the electric motor is equal to or greater than a requested decelerating torque, a vehicle ECU disengages the clutch and controls the electric motor to generate the requested decelerating torque. Meanwhile, when the upper limit decelerating torque is smaller than the requested decelerating torque, the vehicle ECU engages the clutch and controls the engine and the electric motor so that the sum of a decelerating torque generated by the engine and a decelerating torque generated by the electric motor is equal to the requested decelerating torque.

Abstract: A gear shift control apparatus for a hybrid vehicle can achieve enhancement of the transmission efficiency and enhancement of the fuel cost without damaging the drivability to the utmost. The gear shift control apparatus for a hybrid vehicle includes an engine, a transmission for changing the speed of rotation of the engine, and a motor for assisting the driving force of the engine. The assist torque maximum value of the motor is set higher when the gear position of the transmission is a predetermined gear position at which the transmission efficiency of the driving force is highest than when the gear position is any other gear position than the predetermined gear position.

Abstract: A hybrid electric vehicle is capable of transmitting both of a driving force outputted from an engine and a driving force outputted from an electric motor and blocking the transmission of the driving force from the engine to a transmission unit by using a clutch. If the electric motor is in an inoperable state when a gear currently used in the transmission is shifted to a target gear, after disengaging the clutch and bringing the transmission unit into a neutral mode, the vehicle ECU implements temporary engagement control for temporarily engaging and then disengaging the clutch, selects the target gear, and then engages the clutch again.

Abstract: In a hybrid electric vehicle, an output shaft of an engine can be coupled with a rotary shaft of an electric motor of which a driving force can be transmitted to driving wheels. A power cut relay cuts off power supply from a power source to a starter motor through a starting switch when its contact is open. When the switch is shifted to a starting position, an ECU opens the contact of the relay and starts the engine by means of the electric motor, or starts the engine by means of the starter motor by closing the contact of the relay without starting the engine by means of the electric motor. If a specific failure is detected by a failure detection unit when the switch is shifted to the starting position, the ECU starts the engine by the starter motor without starting the engine by the electric motor.

Abstract: In a hybrid electric vehicle, in the event that the driving force of the engine is transmitted to the driving wheels, when a required torque according to an operating state of the vehicle is smaller than an allowable torque, an ECU controls the engine to output the required torque by the engine alone. On the other hand, when the required torque is greater than the allowable torque, the ECU controls the engine so that the engine outputs the allowable torque and controls the motor so that the motor outputs the torque equal to deficiency of the allowable torque with respect to the required torque. The ECU increases the allowable torque in a low revolution region and decreases the allowable torque in a high revolution region in the case in which regeneration of a filter is performed as compared to the case in which the regeneration is not performed.

Abstract: An electric vehicle is provided with an electric motor and a transmission capable of being shifted by a shift mechanism from a neutral state to a start-up speed stage selected state in which a speed stage for start-up of the vehicle has been selected. On a request for a shift from the neutral state to the start-up speed stage selected state, an ECU performs the requested shift by controlling the shift mechanism. If the shift to the start-up speed stage selected state is not completed within a first specified time, the ECU performs a rotating position control in which the motor is controlled to produce a predetermined minute torque in forward and backward rotation directions of the motor, alternately, and a gear of the speed stage for start-up is caused to oscillate in a rotation direction by the minute torque being transmitted to an input shaft of the transmission.

Abstract: A hybrid electric vehicle is arranged such that a driving force of an electric motor can be transmitted to driving wheels and that a rotary shaft of the electric motor can be coupled with an output shaft of an engine. The vehicle comprises a starter motor provided separately from the electric motor, an electric power source provided separately from a battery that supplies power to the electric motor, to supply power to the starter motor, and a braking force maintaining device configured to be activated by power from the power source to maintain a braking force on the vehicle. When a request for starting the engine is made, if a specified abnormal condition which makes the starting of the engine by the electric motor impracticable is detected, an ECU causes the engine to be started by the starter motor when the braking force maintaining device is not active.

Abstract: A hybrid electric vehicle is equipped with an engine output system that makes the engine generate a driving force and outputs the driving force of the engine and a motor output system that makes an electric motor generate a driving force and outputs the driving force of the electric motor, and is capable of transmitting to driving wheels the driving forces outputted from the respective systems. If a failure of the motor output system is not detected, a vehicle ECU sets the gear of an automatic transmission for start-up of the vehicle to a first gear. If the failure is detected, the vehicle ECU sets the gear of the automatic transmission for start-up the vehicle to a second gear that is lower than the first gear.

Abstract: A hybrid electric vehicle is arranged such that a driving force of an engine and a driving force of an electric motor can be transmitted to driving wheels through an automatic transmission having a plurality of forward gears. When it is detected that the vehicle is in a predetermined state in which it is difficult for the electric motor to output an upper limit torque predetermined as a generable maximum torque, a vehicle ECU controls the automatic transmission using a gear shift map configured such that the automatic transmission is downshifted earlier in accordance with a change in the operating state of the vehicle and upshifted later in accordance with a change in the operating state of the vehicle in comparison with a gear shift map that is used when it is not detected that the vehicle is in the predetermined state.

Abstract: A hybrid electric vehicle is arranged such that a driving force of an engine and a driving force of an electric motor can be transmitted to driving wheels through a transmission and that the engine and the transmission can be mechanically connected and disconnected by means of a clutch. When an upper limit decelerating torque generable by the electric motor is equal to or greater than a requested decelerating torque, a vehicle ECU disengages the clutch and controls the electric motor to generate the requested decelerating torque. Meanwhile, when the upper limit decelerating torque is smaller than the requested decelerating torque, the vehicle ECU engages the clutch and controls the engine and the electric motor so that the sum of a decelerating torque generated by the engine and a decelerating torque generated by the electric motor is equal to the requested decelerating torque.

Abstract: A hybrid electric vehicle is arranged such that a driving force of an electric motor can be transmitted to driving wheels, and a rotary shaft of the motor can be coupled with an output shaft of an engine. When a starting switch is switched from the first to the second position, a start control unit starts power supply from a battery to a power control unit. When the starting switch is switched from the second to the third position, the start control unit starts the engine by the electric motor if a control of the power supply to the electric motor can be executed by the power control unit, and, on the other hand, starts the engine by a starter motor if the control of the power supply to the electric motor is not possible to be executed by the power control unit.

Abstract: Driving forces of an engine and an electric motor can be transmitted to driving wheels, and the engine and the driving wheels can be mechanically connected and disconnected by a clutch. A vehicle ECU disengages the clutch and controls the motor to generate a required torque when an upper limit torque generable by the motor is equal to or above the required torque. On the other hand, the ECU engages the clutch and controls the engine and the motor in such a manner that a sum of the torques of the engine and the motor becomes the required torque when the upper limit torque is lower than the required torque. The ECU engages the clutch even if the upper limit torque is equal to or above the required torque when the revolution speed of the motor becomes equal to or above a predetermined revolution speed during traveling of the vehicle.

Abstract: A motor control apparatus for a hybrid vehicle in which a diesel engine is used is disclosed by which the compulsory regeneration time period of the hybrid vehicle is reduced to achieve enhancement of the fuel cost. The motor control apparatus for a hybrid vehicle includes a filter for collecting particulate matter in exhaust gas of the diesel engine, compulsory regeneration means for compulsorily regenerating the filter, and battery charging means for converting the output power of the diesel engine into electric power based on a charged state of the battery and charging the battery with the electric power. When the compulsory regeneration is executed, the supply of electric power to the battery by the engine is inhibited.

Abstract: A gear shift control apparatus for a hybrid vehicle is disclosed which can achieve enhancement of the transmission efficiency and enhancement of the fuel cost without damaging the drivability to the utmost. The gear shift control apparatus for a hybrid vehicle includes an engine, a transmission for changing the speed of rotation of the engine, and a motor for assisting the driving force of the engine. The assist torque maximum value of the motor is set higher when the gear position of the transmission is a predetermined gear position at which the transmission efficiency of the driving force is highest than when the gear position is any other gear position than the predetermined gear position.

Abstract: An engine operation controller for a hybrid electric automobile is equipped at least with a motor and an engine. The engine operation controller is provided with a speed detection section for detecting the speed of the vehicle, a control section for controlling operation of the engine, and a decision section for deciding whether or not a stop of the vehicle is a stop at a stopping place. If it is detected by the speed detection section that the speed is less than a predetermined value, operation of the engine is prohibited by the control section. Furthermore, a delay section is provided for delaying removal of the operation prohibition of the engine when it is decided by the decision section that the stop of the vehicle is a stop at a stopping place.

Abstract: The present invention relates to an engine operation controller for a hybrid electric automobile equipped at least with a motor (3) and an engine (4). The engine operation controller is provided with a speed detection section (30) for detecting speed of the vehicle, a control section (6) for controlling operation of the engine (4), and a decision section for deciding whether or not a stop of the vehicle is a stop at a stopping place. If it is detected by the speed detection section (30) that the speed is less than a predetermined value, operation of the engine (4) is prohibited by the control section (6). Furthermore, a delay section is provided for delaying removal of the operation prohibition of the engine (4) when it is decided by the decision section that the stop of the vehicle is a stop at a stopping place.

Abstract: The invention provides a warm-up control device of a hybrid electric vehicle, which warms up an engine for generator while extending the life of the engine and improves the quietness. If an engine temperature is not greater than a set temperature after the start of the engine for generator, the warm-up control device controls a load of the generator and controls an engine output in accordance with the load of the generator so as to maintain an engine revolution speed at a predetermined low revolution speed.

Abstract: A generation control device of a hybrid electric vehicle is able to satisfactorily generate power with an excellent responsiveness with respect to a high output requirement from a motor. If a charge level SOC sensed by a charge level sensing device is not greater than a generation start value SOCsta, a generator starts a normal output generation (P(G)=P1). The normal output generation is continued until the charge level SOC reaches a generation end value SOCend larger than the generation start value SOCsta. If a required power consumption Pm of a traction motor sensed by a required power consumption sensing device is not less than Ph, a high output generation (P(G)=P2) with a higher output than the normal output generation is executed instead of the normal output generation.

Abstract: A generation control device of a hybrid electric vehicle is able to satisfactorily generate power with an excellent responsiveness with respect to a high output requirement from a motor. If a charge level SOC sensed by a charge level sensing device is not greater than a generation start value SOCsta, a generator starts a normal output generation (P(G)=P1). The normal output generation is continued until the charge level SOC reaches a generation end value SOCend larger than the generation start value SOCsta. If a required power consumption Pm of a traction motor sensed by a required power consumption sensing device is not less than Ph, a high output generation (P(G)=P2) with a higher output than the normal output generation is executed instead of the normal output generation.

Abstract: The invention provides a warm-up control device of a hybrid electric vehicle, which warms up an engine for generator while extending the life of the engine and improves the quietness. If an engine temperature is not greater than a set temperature after the start of the engine for generator, the warm-up control device controls a load of the generator and controls an engine output in accordance with the load of the generator so as to maintain an engine revolution speed at a predetermined low revolution speed.