Abstract: In order to effectively prevent generation of a counter electromotive voltage during cruising, the present invention provides a control system of a hybrid vehicle comprising an engine, motor, and a capacitor, including an engine rotational speed sensor for detecting the engine rotational speed NE, a target voltage setting device for setting a charge target voltage (target capacitor voltage), and a motor ECU for controlling the charge of said power storage unit. A target capacitor voltage VCAPCMD is set based on the detected engine rotational speed NE (step S300), and when the capacitor voltage VCAP<the target capacitor voltage VCAPCMD (step S311 is “YES”), a charging operation is executed until the target capacitor voltage VCAPCMD≦the capacitor voltage VCAP. Thereby, it is possible to maintain the counter electromotive voltage<the capacitor voltage.

Abstract: The engine control system, according to the present invention, for a hybrid vehicle, which has an internal combustion engine and an electric motor as driving force sources, and permits stopping and starting of the engine in accordance with predetermined drive conditions, the engine control system comprises: power-consumption detector for detecting an amount of power consumption by predetermined device; first power storage unit for supplying electric energy to the motor and storing energy generated when the electric motor is operated as a generator by the internal combustion engine and energy regenerated by regeneration; second power storage unit for supplying electric energy to the predetermined device; remaining-amount detector for detecting a remaining charge of said first power storage unit; stop/start determination device for determining whether to permit stopping or starting of the engine in accordance with the amount of power consumption by the predetermined device and the remaining charge of the first

Abstract: A control device for a hybrid vehicle including an engine for outputting a propulsion force for the vehicle, a motor for assisting the output from the engine, and a storage unit for storing generated energy when the motor is used as a generator under the output from the engine and regenerated engine obtained from regenerative braking of the motor at the time of vehicle deceleration. Moreover, the control device includes an engine output detection device for detecting a change in output from the engine, and a motor control device for, in the case where an increase in output from the engine is detected at the time of vehicle traveling when the motor is not assisting the output from the engine, simultaneous with the increase in output, converting the increase amount in output into the generated energy using the motor.

Abstract: When the shift position is an N position or a P position during deceleration of a vehicle, or when a brake pedal is depressed even if the shift position is a D position or an R position, an engine E is stopped to prohibit an unnecessary idling operation by prohibiting the restarting of the supplying of fuel subsequent to the fuel cut by a command from an electronic control unit. If the supplying of fuel is restarted when the engine is in stoppage, a starter motor is driven automatically to start the engine. Thus, in a vehicle including an automatic transmission, the time of stoppage of the engine can be prolonged as much as possible in a range in which the operability of the vehicle is injured, thereby providing a reduction in amount of fuel consumed.

Abstract: This invention relates to an engine stall prevention apparatus for a hybrid vehicle. This engine stall prevention apparatus comprises a clutch operation detection device which detects an operation of a clutch; a clutch state determination device which determines the state of the clutch based on the relationship between the vehicle speed and the engine speed; a throttle opening degree determination device which determines the degree of throttle opening of the engine; a first engine speed modification device (S010) which modifies a charging/regeneration allowing lower limit engine speed value above which deceleration regeneration by the electric motor is allowed; and a half-engaged clutch determination maintaining device (S008) which outputs a determination signal indicating that the clutch is half-engaged for a predetermined period of time when the throttle is completely closed and the clutch is determined to be half-engaged.

Abstract: The control apparatus of the present invention is provided in a hybrid vehicle with a combustion engine for outputting a driving force, an electric motor for generating a force for assisting the output from the engine, depending on the driving conditions, a power storage unit for storing electric energy generated by the motor acting as a generator using the output from the engine and electric energy regenerated by the motor when the vehicle decelerates. The control apparatus includes: a speed limiter for decreasing the driving force produced by the motor when the vehicle speed exceeds a first threshold value while the engine and the motor produce the driving force; a generation starter for starting generation by the motor when the vehicle speed exceeds a second threshold value which is higher than the first threshold value; and a generation amount setting device for setting the amount of generation, depending on the driving conditions of the vehicle, when the generation starter starts the generation.

Abstract: The control apparatus for an internal combustion engine of the present invention comprises: a fuel supply device for supplying fuel to the internal combustion engine; a fuel tank for retaining fuel; a purge device for purging fuel vapor, produced in the fuel tank, into an intake system of the internal combustion engine; a purge correction amount updating device for calculating a purge correction amount for correcting an amount of fuel to be supplied by the fuel supply device, depending on the amount of fuel vapor purged by the purge device; a target air-fuel ratio setting device for setting a target air-fuel ratio depending on a running state of the internal combustion engine; and an update amount setting device for updating the purge correction amount depending on the target air-fuel ratio set by the target air-fuel ratio setting device.

Abstract: In order to prevent an occurrence of dieseling phenomenon, and to prevent engine rotation speed from decreasing during idle operation or the idle operation from being stopped, in step S111, it is determined whether the flag value of an idle stop flag F_IDLSTP is “1” or not. If it is determined that the determination result is “YES”, that is, if it is determined that the internal combustion engine body is stopped, 0% is set to a target purge control valve drive duty value PGCMD (step S105), and 0 is set to the target purge flow rate QPGC (step S106). If it is determined that the determination result is “NO”, that is, when the internal combustion engine body is in operation, PGCMD calculation processing is executed (step S112).

Abstract: A control apparatus for a hybrid vehicle having a dynamotor which operates as a motor for assisting the output of an internal combustion engine and which operates as a generator for regenerating the running energy of the vehicle. The control apparatus, in accordance with operating conditions of the vehicle, controls an assist operation for supplying electric power from a storage device to the dynamotor and a regenerative operation for charging the storage device by the generated power of the dynamotor, and determines an acceleration mode for performing an assist operation or a cruising mode for selectively performing the assist operation and a regenerative operation, in accordance with an engine rotational speed and a throttle valve opening degree, or a vehicle speed of the vehicle and the throttle valve opening degree.

Abstract: A control system is provided for a hybrid vehicle with an engine, a motor, and a power storage unit. The control system comprises: an assist trigger threshold value setting device for setting a throttle opening state when the motor starts assist for the output from the engine; a throttle opening state lower limit setting device for setting a lower limit by subtracting a predetermined value from the threshold value obtained by the assist trigger threshold value setting device; a generation reduction device for gradually reducing the generation by the motor between the lower limit and the threshold value so that the generation finally becomes zero when the present throttle opening state reaches the threshold value, when the vehicle shifts from a generation state, in which the motor acts as a generator and the output is supplied only from the engine, to an output assist state in which the motor assists the output.

Abstract: When the shift position is an N position or a P position during deceleration of a vehicle, or when a brake pedal is depressed even if the shift position is a D position or an R position, an engine E is stopped to prohibit an unnecessary idling operation by prohibiting the restarting of the supplying of fuel subsequent to the fuel cut by a command from an electronic control unit. If the supplying of fuel is restarted when the engine is in stoppage, a starter motor is driven automatically to start the engine. Thus, in a vehicle including an automatic transmission, the time of stoppage of the engine can be prolonged as much as possible in a range in which the operability of the vehicle is injured, thereby providing a reduction in amount of fuel consumed.

Abstract: A hybrid vehicle has a transmission coupled to the output shaft of an engine for transmitting an output power of the engine to drive wheels of the hybrid vehicle. A generator motor is coupled to the transmission for transmitting an assistive output power for assisting the output power of the engine through the transmission to the drive wheels. A battery stores electric energy regenerated by the generator motor, operating as an electric motor, from kinetic energy of the hybrid vehicle transmitted from the drive wheels through the transmission when the hybrid vehicle is decelerated. A transmission control unit establishes a speed reduction ratio for the transmission to achieve a predetermined regeneration efficiency for the generator motor when the hybrid vehicle is decelerated, and controls the transmission at the established speed reduction ratio.

Abstract: A regeneration control device for a hybrid vehicle includes an internal combustion engine, driving wheels drivable by the internal combustion engine, a motor for additionally supplying electric power for driving the driving wheels, a transmission between the engine, motor and driving wheels and an accumulator for supplying electric power to the motor, which causes the motor to work, while braking the vehicle, as a generator whose output is returned to the accumulator which in turn stores electric energy regenerated depending upon the deceleration degree.

Abstract: The control system of the present invention is provided for a hybrid vehicle with an engine and a motor, which are power sources, and a power storage unit for storing energy generated by the output from the engine and regenerative energy produced by regeneration of the motor when the vehicle decelerates. Based on monitoring the state of charge of the power storage unit, when the stored energy is discharged so that the remaining charge is decreased from an initial state of charge, which was detected when the vehicle started running, by a predetermined amount, the function of the motor is switched from the discharging of the power storage unit to the charging of the power storage unit.

Abstract: A hybrid vehicle has a generator motor coupled to the output shaft of an engine through a transfer shaft, for transmitting an assistive output power for assisting an output power of the engine through the transfer shaft to the output shaft of the engine. A battery stores electric energy regenerated by the generator motor from kinetic energy of the hybrid vehicle transmitted from the output shaft of the engine through the transfer shaft. A generator is mounted on the transfer shaft and has an electric energy generating ability smaller than the generator motor. The generator generates electric energy to energize another device than the battery.

Abstract: A hybrid vehicle has an engine for propelling the hybrid vehicle, a power transfer mechanism for transferring an output power of the engine from an output shaft thereof to drive wheels of the hybrid vehicle, an electric motor for supplying an assistive output power to assist the output power of the engine through the power transfer mechanism to the drive wheels, and an electric energy storage unit for storing electric energy for energizing the electric motor. The hybrid vehicle also has a controller for controlling operation of the hybrid vehicle with the engine and the electric motor. If the amount of electric energy stored in the electric energy storage unit is greater than a predetermined quantity, the controller controls the electric motor to generate the assistive output power to start the hybrid vehicle with the electric energy supplied from the electric energy storage unit to the electric motor while the engine is idling or stopped.

Abstract: A torque shock alleviating device in a hybrid vehicle utilizing both an engine and an electric motor as drive sources, whereby a torque shock is not generated when the rich-spiking of the air-fuel mixture is carried out in order to restore the adsorbing ability of an NOx adsorbing device in the hybrid vehicle. When an engine is operated in a lean burn manner, NOx in an exhaust gas is adsorbed to an NOx adsorbing device provided in an exhaust passage. When the adsorbing ability of the NOx adsorbing device reaches a saturated level, a rich-spiking for temporarily enrichening the air-fuel mixture of the engine is carried out to restore the adsorbing ability of the NOx adsorbing device. When the output torque from the engine is increased by the rich-spiking, a regenerative braking force is generated in a motor, thereby moderating the increase in output torque from the engine by such regenerative braking force to alleviate the torque shock.

Abstract: A refueling pipe structure of a fuel tank includes a tank body, and an a refueling pipe which is connected to the tank body to extend upwardly therefrom. The refueling pipe is provided at its upper end with a refueling port into which a refueling nozzle can be inserted. The structure includes a flow direction limiting device mounted within the refueling pipe in the vicinity of the refueling port for guiding a fuel flow from a tip end of the refueling nozzle toward an inner surface of the refueling pipe, while limiting the fuel flow in a gyrate direction along the inner surface of the refueling pipe. Thus, the generation of evaporated fuel within the refueling pipe during refueling can be inhibited, and fuel can be smoothly introduced into the tank body.

Abstract: An evaporative fuel-processing system for an internal combustion engine for use in a vehicle. A passage extends between the fuel tank and the intake passage, for guiding evaporative fuel generated in the fuel tank, for processing, across which a canister is arranged. A first passage and a second passage are connected to the canister. A first valve is arranged across the first passage to allow air to flow into the canister through the first passage and inhibit air containing evaporative fuel from being discharged from the canister through the first passage. A second valve is arranged across the second passage to inhibit air from flowing into the canister through the second passage and allow air containing evaporative fuel to be discharged from the canister through the second passage. A filter is arranged in the first passage.

Abstract: The concentration of a hydrocarbon gas in a gas discharged from a drain port is detected by a break-through gas concentration sensor provided in a discharge pipe connected to the drain port. The entire amount of the hydrocarbon gas discharged from the drain port as a result of breaking-through of an adsorbent layer is collected by a break-through gas collecting means, and the entire amount of the hydrocarbon gas collected by the break-through gas collecting means is detected. Thus, in measuring the adsorbing ability of a canister, the concentration of the hydrocarbon discharged from the canister by the breaking-through can be detected with the passage of time and in a stable manner, whereby a measurement value of an excellent accuracy can be provided by a single measurement.