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: A regeneration control device of a hybrid electric vehicle can sufficiently charge a battery with power regenerated as a result of the regenerative braking and effectively perform the regenerative braking, and which can also ease the burden of a friction brake. If chargeable power set by a chargeable power setting device according to an actual level of the battery becomes lower than regenerated power computed by a regenerated power computing unit during the regenerating operation of a motor, the power regenerated by the motor is supplied to a generator. This drives the generator to cause an engine to run an engine brake without the supply of fuel.

Abstract: A regeneration control device of a hybrid electric vehicle can sufficiently charge a battery with power regenerated as a result of the regenerative braking and effectively perform the regenerative braking, and which can also ease the burden of a friction brake. If chargeable power set by a chargeable power setting device according to an actual level of the battery becomes lower than regenerated power computed by a regenerated power computing unit during the regenerating operation of a motor, the power regenerated by the motor is supplied to a generator. This drives the generator to cause an engine to run an engine brake without the supply of fuel.

Abstract: A rear-wheel steering control apparatus includes a controller, which performs a first-order lag process. This process is equivalent to a first-order lag transfer function and is represented by a time constant matching loadage data from a rear-wheel stroke sensor and a proportional constant matching vehicle speed data from a vehicle speed sensor. The first-order lag process is performed on a front-wheel steering angle, obtained based on steering-wheel angle data from a steering-wheel angle sensor, to thereby set a target rear-wheel steering angle. Steering of rear wheels to the set rear-wheel steering angle is carried out with a degree of first-order response delay corresponding to the loadage. Thereby, traveling stability and forepart turning performance of a vehicle are improved in various loading and steering conditions.