Abstract: A hybrid vehicle control apparatus is provided, wherein an unpleasant sensation is not imparted to a driver depressing an accelerator pedal at the time of departure. In a hybrid vehicle control apparatus with an engine and a motor as the drive sources, and a battery for storing electrical energy from the engine or the kinetic energy of the vehicle converted by the motor, the vehicle is provided with an automatic transmission. Moreover, there is provided a discharge suppression mode which suppresses discharge from the remaining battery charge detected by a battery ECU, and a charge/discharge permit mode which permits charge/discharge of the battery. At a time of vehicle departure, departure assistance is performed only when a degree of throttle opening showing an acceleration intention of the driver exceeds a determination threshold which is larger than a determination threshold for at the time of the discharge/charge permit mode.

Abstract: An engine control system for a hybrid vehicle having an internal combustion engine and an electric motor as driving force sources, for permitting stopping and starting of the engine in accordance with predetermined drive conditions. The system includes a booster for receiving a negative pressure supplied by an operation of the engine, a pressure detector for detecting a pressure supplied to the brake booster, a throttle-opening state detector for detecting a throttle opening state and an engine-operation enable/disable determining device for determining whether or not to operate the engine when the engine is stopped, based on the throttle opening state detected by the throttle-opening-state detector and the pressure detected by the pressure detector.

Abstract: Conditions for permitting operation of vibration control are that; a stored charge of a battery 17 for an electric motor detected by storage state monitoring devices 15 and 24 is larger than a predetermined storage charge threshold, a vehicle's engine is idling, engine speed is within a prescribed range, and engine load is within a prescribed range. When all these conditions are satisfied, vibration damping control by a vibration damping control device is performed.

Abstract: A control device for a hybrid vehicle is provided that can prevent fuel consumption from deteriorating by preventing a battery from tending to discharge if a failure such as being unable to operate a deceleration cylinder deactivation system occurs.

Abstract: A control apparatus 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 generated by the motor when the vehicle decelerates. The control apparatus includes an output assistance determining device for determining whether to assist the output from the engine by the motor; a generation controller for setting the amount of generation by the motor and performing the generation by the motor when the output assistance determining device determines that the motor is not to assist the output from the engine; and a generation limiter for limiting the amount of generation set by the generation controller.

Abstract: A system for automatically stopping and starting an engine of a vehicle which enables proper determination of whether the stopping of the engine is possible, in accordance with the state of a battery. A power brought out from the battery by auxiliaries is subtracted from a power generated by a generator, thereby calculating a difference corresponding to a power for actually charging the battery. By sequentially adding the value, an integrated value of power charged in the battery is calculated. Meanwhile, a value of a known power WBRK consumed by a brake lamp plus a current power consumed by the auxiliaries is multiplied by a beforehand determined target value of idling-stoppage duration, thereby evaluating an evaluated integrated value of power consumed by the battery during stoppage of an idling. If the integrated value is not less than the evaluated integrated value, the stopping of the engine E is permitted.

Abstract: A control system and method applied to a hybrid vehicle by which an excessive decrease of the remaining battery charge can be prevented while driving in a traffic jam. In the method, the remaining battery charge of the battery device is detected; and whether the vehicle is driving in a traffic jam is determined; and the charging device is made to charge the battery device if the detected remaining battery charge of the battery device is below a first predetermined value, and if it is determined that the vehicle is driving in a traffic jam.

Abstract: An engine automatic start stop control apparatus for controlling an engine of a vehicle to be automatically stopped or started in response to driving conditions of a vehicle, which is equipped with a manual transmission, an automatic transmission or a continuously variable transmission (CVT). The apparatus makes a determination whether or not to allow stop (or idle stop) of the engine in consideration of a relationship between outside air temperature and engine water temperature. This prevents a catalyst from being deteriorated in performance as a result of a temperature reduction of the catalyst occurs when the engine idling is carelessly stopped. Thus, it is possible to effectively reduce discharge gas of the vehicle. The outside air temperature can be estimated based on intake air temperature which is detected after the vehicle runs for a prescribed time. The idle stop of the engine is inhibited in response to a request from an air conditioner or to avoid cool-down of the engine to be restarted.

Abstract: An exhaust gas purifying apparatus for an internal-combustion engine comprises an exhaust gas purifier including nitrogen oxide purifier for purifying nitrogen oxide contained in exhaust gases and an oxygen density sensor located downstream of the exhaust gas purifier. The apparatus further comprises sulfur oxide detector for detecting density of sulfur oxide in the exhaust gas purifier, sulfur-poisoning recovery means for recovering the exhaust gas purifier from sulfur poisoning when it has been determined by the sulfur oxide detector that the sulfur oxide density is high, and a lean operation limiter for limiting the lean operation of the engine to such operation region that is not influenced so much by the sulfur poisoning after the exhaust gas purifier has been recovered from the sulfur poisoning. Deterioration determining means is also provided for determining deterioration of the exhaust gas purifier based on the output of the oxygen density sensor during the lean operation of the engine.

Abstract: An automatic stop and start control system for a multiple-cylinder internal combustion engine mounted on a vehicle is disclosed. The automatic stop and start control system performs a control for automatically stopping and restarting the engine according to operating conditions of the vehicle and the engine. Fuel is provided to at least one of the cylinders of the engine when an engine stop condition for stopping the engine is satisfied. Subsequently, the fuel supply to all of the cylinders of the engine is stopped. The fuel supply to at least one of the cylinders is immediately carried out at the time an engine restart condition for restarting the engine is satisfied.

Abstract: An exhaust gas purifying apparatus for an internal-combustion engine comprises a three-way catalyst, nitrogen oxide purifier that is disposed downstream of the three-way catalyst, an upstream oxygen sensor that is disposed between the three-way catalyst and the nitrogen oxide purifier, and a downstream oxygen sensor that is disposed downstream of the nitrogen oxide purifier. Means is provided for setting an abnormality determination criterion in accordance with the exhaust gas amount of the internal-combustion engine wherein the criterion is equivalent to a time period until the output of the downstream oxygen density sensor is read since the output of the upstream oxygen density sensor is changed to rich after the air-fuel ratio of the exhaust gas was turned over from lean to rich. Means is provided for determining that the nitrogen oxide purifier is abnormal when the output of the downstream oxygen density sensor has been changed to rich before the said time period represented by the criterion elapses.

Abstract: The present invention provides an air-fuel ratio feedback control apparatus for an internal-combustion engine that can avoid an overshoot of the actual air-fuel ratio when the diagnostic device for diagnosing the NOx purifier changes the air-fuel ratio from lean to rich. The apparatus comprises air-fuel ratio detector that is disposed in an exhaust system of the engine so as to detect an air-fuel ratio of exhaust gas, NOx purifier for purifying NOx contained in the exhaust gas during a lean operation and feedback controller for making a feedback control upon an air-fuel ratio of air-fuel mixture to be supplied to the engine based on an output of the air-fuel ratio detector.

Abstract: A control device for a hybrid vehicle provided with an engine and a motor as driving sources, and a storage battery device which stores regenerative energy obtained by output from the engine or by regenerative operation of the motor during deceleration of the vehicle. The control device includes: a vehicle speed detection unit which detects speed of the vehicle; a deceleration fuel cut determination unit which determines whether supply of fuel to the engine is stopped during deceleration of the vehicle; and a brake detection unit which detects operation of a brake, wherein regenerative braking is stopped when operation of the brake is detected by the brake detection unit if the vehicle speed detected by the vehicle speed detection unit is lower than a predetermined speed and if it is determined by the deceleration fuel cut determination unit that the supply of fuel to the engine is not stopped.

Abstract: An engine automatic start stop control apparatus controls an engine of a vehicle to be automatically stopped or started in response to driving conditions of a vehicle. Particularly, the apparatus is applied to the vehicle that performs idle stop control for reduction of discharge gas. Herein, the apparatus controls the engine to restart based upon determination for restarting the engine under an engine stop mode. Namely, the apparatus controls the engine to restart if a driver depresses a clutch pedal or if a driver does not depress a brake pedal during an engine stall in which engine speed becomes zero. Thus, it is possible to restart the engine by prescribed operations even if the driver mistakenly recognizes that the engine is stopped by automatic stop control although the engine actually stalls due to an error operation of the driver so that the engine speed becomes zero.

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 hybrid vehicle control apparatus is provided, wherein an unpleasant sensation is not imparted to a driver depressing an accelerator pedal at the time of departure. In a hybrid vehicle control apparatus with an engine and a motor as the drive sources, and a battery for storing electrical energy from the engine or the kinetic energy of the vehicle converted by the motor, the vehicle is provided with an automatic transmission. Moreover, there is provided a discharge suppression mode which suppresses discharge from the remaining battery charge detected by a battery ECU, and a charge/discharge permit mode which permits charge/discharge of the battery. At a time of vehicle departure, departure assistance is performed only when a degree of throttle opening showing an acceleration intention of the driver exceeds a determination threshold which is larger than a determination threshold for at the time of the discharge/charge permit mode.

Abstract: A control device for a hybrid vehicle powered from an engine and an assist motor for supplying electric power in an amount predetermined according to running conditions of the vehicle further includes means for detecting a catalyzer temperature and correcting the predetermined assist power value according to the detected catalyzer temperature when accelerating and means for preventing the idling engine from being cut off when detected catalyzer temperature is lower than a preset temperature. This control device thus realizes rapid heating of the catalyzer device to a temperature necessary for activating the catalyzer therein by adequately correcting the assist power value of the motor according to the current catalyzer temperature when accelerating and by preventing the idling engine from being cut off while the catalyzer device has a low temperature.

Abstract: A control apparatus of a hybrid vehicle is provided, capable of charging the battery device when the state of charge of the battery device tends to decrease and the initial state of charge of the battery device is reduced by a predetermined amount. The present device comprises a lower limit threshold value setting device S060, an upper limit threshold value setting device for setting the lower limit and upper limit threshold values of the discharge amount of the battery device, a mode setting device S054 for increasing the state of charge when the state of charge is reduced to the lower limit threshold value, a mode setting release device S062 for releasing the mode setting changed by the mode setting device, and a discharge depth detecting device S063 for detecting the discharge amount of the present state of charge by comparison with the initial state of charge. The threshold value for determining whether it is necessary for the motor to assist the engine is modified depending upon the discharge depth.

Abstract: An engine control system for a hybrid vehicle having an internal combustion engine and an electric motor as driving force sources, for permitting stopping and restarting of the engine in accordance with predetermined drive conditions. The engine control system includes a fuel cutter for cutting fuel supply to the engine when the vehicle decelerates and an engine speed detector for detecting an engine speed. Stopping of the engine is initiated by cutting the fuel supply by the fuel cutter, and when the engine speed becomes equal to or lower than a predetermined speed, the engine is stopped by operating the motor as a generator and by cutting the fuel supply.

Abstract: An evaporative fuel processing system adapted to be capable of detecting abnormality of an evaporative emission control system for storing, in a canister, evaporative fuel from a fuel tank for holding fuel to be supplied to an internal combustion engine, and purging evaporative fuel into the intake system of the engine. A first control valve is arranged across a passage extending between the fuel tank and the canister. A second control valve is arranged across a passage extending between the canister and the intake system of the engine. A third control valve is provided for an air inlet part of the canister communicatable with the atmosphere. Through operating these control valves to open and close them, the evaporative emission control system is negatively pressurized, and abnormality of this system is detected based on the pressure detected in this negatively pressurized state thereof. Timing for carrying out abnormality determination is determined depending on conditions of the fuel tank.