Abstract: A vehicle control system includes a generating device (1,4), a motor (5) electrically connected to this generating device (1,4) and a battery (27), and a controller (11, 12, 13). This controller (11, 12, 13) computes a target motor power based on a vehicle running condition, computes an available battery output which can be supplied from the battery (27) to the motor (5) based on this target motor power, computes a target generated power of the generating device (1,4) based on the available battery output and target motor power, and controls the generating device (1,4) based on the target generated power.

Abstract: A wall surface of a combustion chamber (5) of an internal combustion engine (1) is divided into a low temperature wall surface (5b) and a high temperature wall surface (5a, 6a, 15a) comprising other components, and behavior models of the fuel adhering to these wall surfaces are created. By determining the fuel ratio which vaporizes from the wall surfaces and burns, and the fuel ratio which is discharged without being burnt, in respective models according to the wall surface temperatures, particularly under transient conditions, these behavior models allow the fuel amount burnt in the combustion chamber (5) and the fuel amount discharged in the exhaust gas to be precisely known.

Abstract: A controller (10, 11, 12) computes a virtual generated power, this being the power generated by a generator (2) when an engine (1) and the generator (2) are controlled so that the power generated by the generator (2) coincides with the power consumption of a motor (4) which is uniquely determined according to a vehicle running state, computes an output limiting value of the motor (4) based on the virtual generated power, and limits the power or torque of the motor (4) by the output limiting value.

Abstract: Torque control of an electrical motor 4 connected to a drive shaft 6 and control of the rotation speed of a generator 2 supplying electrical power to the electrical motor 4 are performed in response to the running conditions of a vehicle. The actual generator output of the generator 2 is estimated at a given time and the drive output of the electrical motor 4 is limited in response to the estimated generator output. The drive output of the electrical motor 4 is limited in response to increases in consumed energy and reductions in the generated output of the generator 2 resulting from increases in the kinetic energy of rotating components of the engine 1 or the generator 2 during acceleration. Thus the difference of the generated output of the generator 2 and the consumed electrical power of the electrical motor 4 can be reduced during acceleration and it is possible to reduce the capacity of the battery supplying auxiliary electrical power.

Abstract: A vehicle control system includes a generating device (1,4), a motor (5) electrically connected to this generating device (1,4) and a battery (27), and a controller (11, 12, 13). This controller (11, 12, 13) computes a target motor power based on a vehicle running condition, computes an available battery output which can be supplied from the battery (27) to the motor (5) based on this target motor power, computes a target generated power of the generating device (1,4) based on the available battery output and target motor power, and controls the generating device (1,4) based on the target generated power.

Abstract: A target output torque and target power generation output of a motor are computed based on a vehicle running state, and a target input rotation speed of a generator is computed based on the target power generation output. The final target output torque of the motor is computed by performing delay processing on the target output torque using a filter of second or higher order. The same delay processing by an identical filter is performed on the target input rotation speed, and the final target input rotation speed supplied to the generator is computed. In this way, the response of the driving power output (=power consumption of the motor) and the generated power of the generator are made to coincide even if the vehicle running state changes sharply, and the battery capacity can be minimized.

Abstract: A controller (10, 11, 12) computes a virtual generated power, this being the power generated by a generator (2) when an engine (1) and the generator (2) are controlled so that the power generated by the generator (2) coincides with the power consumption of a motor (4) which is uniquely determined according to a vehicle running state, computes an output limiting value of the motor (4) based on the virtual generated power, and limits the power or torque of the motor (4) by the output limiting value.

Abstract: The output of an engine is recovered by a generator. A motor is driven by the electric power generated by the generator. When there is a sudden acceleration, etc., the generation power output by the generator is delayed, and when the electric power supplied to the motor is insufficient, the insufficient part is supplied from a battery. The maximum power output of the battery decreases according to battery temperature. However, as the response of the generation power output of the generator is increased if battery temperature is low, the above-mentioned insufficient part is always suppressed below the maximum power output of the battery. In this way, the inability of the battery to supply electric power required for acceleration is prevented, and thus the problem of poor acceleration is eliminated.

Abstract: Torque control of an electrical motor 4 connected to a drive shaft 6 and control of the rotation speed of a generator 2 supplying electrical power to the electrical motor 4 are performed in response to the running conditions of a vehicle. The actual generator output of the generator 2 is estimated at a given time and the drive output of the electrical motor 4 is limited in response to the estimated generator output. The drive output of the electrical motor 4 is limited in response to increases in consumed energy and reductions in the generated output of the generator 2 resulting from increases in the kinetic energy of rotating components of the engine 1 or the generator 2 during acceleration. Thus the difference of the generated output of the generator 2 and the consumed electrical power of the electrical motor 4 can be reduced during acceleration and it is possible to reduce the capacity of the battery supplying auxiliary electrical power.

Abstract: An engine start control apparatus includes a motor/generator and a controller for controlling the motor/generator. The controller starts an engine cranking operation to start the engine by operating the motor/generator in a cranking mode for driving an engine in response to an engine start command signal, monitors an operating condition of the engine cranking operation to produce a mode change signal before an engine speed exceeds a target speed, and switches the motor/generator from the cranking mode to an overshoot control mode to control the power generation of the motor/generator in accordance with a predetermined target parameter such as a target power generation torque and a desired engine speed.

Abstract: An automatic engine stop and restart system includes an engine, a starting motor, a transmission, a vehicle operating condition sensor and a controller. The controller monitors the vehicle operating condition to produce an automatic engine restart request signal during an automatic engine stop operation, calculates a target engine speed for the automatic engine restart operation, and drives the motor in accordance with the target speed to perform the automatic engine restart operation in response to the engine restart request signal. During the automatic engine restart operation, the transmission is held in a drive state or in a non-drive state invariably.

Abstract: An automatic engine-stop control apparatus for a vehicle includes a vehicle speed sensor and a brake pedal depression sensor which are coupled to a control unit. The control unit is programmed to decide that the vehicle speed detected by the vehicle speed sensor is smaller than or equal to a predetermined stop expected speed when the brake pedal depression sensor detects that the brake pedal is depressed, and to decide that the vehicle is stopped when a predetermined time period elapses from a moment that the vehicle speed becomes smaller than or equal to the predetermined stop expected speed and when the depression of the brake pedal is continued.

Abstract: An engine comprising a throttle controller operable in response to an intake air control command, a fuel controller operable in response to a fuel control command, and an engine controller for generating the intake air control command and the fuel control command. The engine controller determines a target equivalence ratio for detected operating state of the engine, controls a change between stratified charge combustion and homogeneous charge combustion, delays the target equivalent ratio, determines the intake air control command and the fuel control command in response to the delayed target equivalence ratio.

Abstract: A control system for a vehicle with an engine-CVT power train senses operator's desire relative to movement of the vehicle and translates the sensed operator's desire into a predetermined variable indicative of drive force applicable to the vehicle drive wheel. In integrated control mode, the predetermined variable indicative of drive force controls the engine throttle and the ratio of the CVT. In individual control mode, the integrated control is put out of operation and the sensed operator's desire controls the engine throttle and the ratio of the CVT. The control system provides an improved control over the transition period between the control modes.

Abstract: An engine control system for an internal combustion engine comprises a combustion system for changing over a combustion mode from a first mode such as a stratified charge combustion mode to a second mode such as a homogeneous charge combustion mode, and an EGR system for controlling an EGR flow to the engine with an EGR control valve. A controller calculates a delayed target equivalent ratio which varies gradually from a first ratio for the first mode to a second ratio for the second mode, and further calculates a modified target equivalent ratio in consideration of an amount of an EGR gas. The controller determines the combustion changeover timing by monitoring a parameter based on the modified target equivalent ratio to take account of the influence of the EGR gas.

Abstract: An engine system for an internal combustion engine of a type having a stratified combustion mode and a homogeneous combustion mode comprises a controller for increasing a fuel air ratio (or equivalence ratio) of an air fuel mixture produced in the engine abruptly in a transient state during transition from the stratified mode to the homogenous mode to ensure stable combustion. The controller estimates a residual EGR gas quantity, and produces a step change in the fuel air ratio when the fuel air ratio enters a predetermined unstable range and the EGR gas still remains in a considerable amount.

Abstract: An engine torque control system controls an intake air quantity with a throttle valve and a fuel supply quantity with a fuel injector so as to obtain a target engine torque and a target air fuel ratio in accordance with engine operating conditions.

Abstract: The invention stabilizes combustion performance upon a change from operation with stratified combustion to operation with homogeneous combustion. The lower limit for the equivalence ratio just after a change from operation with stratified combustion to operation with homogeneous combustion is set at a value greater than set under steady conditions so as to avoid adverse influence of residual external and internal EGR (exhaust gas recirculation).