Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Shinobu Ochiai

Kazuhiro Hara

Jiro Takagi

Masaya Agata

Yosuke Kosaka

Daisuke Shiomi

Kentaro Onuma

Minoru Suzuki

Kazunori Watanabe

Yasumichi Ohnuki

Morio Kayano

Atsushi Shibutani

Shinji Yoshikawa

Hiroshi Murakami

Iwao Shimane

Masahiro Takeuchi

Akira Ozawa

Shinji Kato

Taichi Ogawa

Kiyoshi Asami

Naoki Tsuji

Tatsuya Arikai

Tomohiro Shiraishi

Keisuke Urushihara

Toshiyuki Watanabe

Hiroshi Koan

Yasunori Ohyama

Naoki Osawa

Yoshuke Kosaka

Ayao Kawamaki

There is provided with an engine control device that can reduce the time it takes to start the monitoring of an output of an engine. The engine control device comprises a monitor unit configured to monitor an output of an engine when engine speed is a threshold or more, and a control unit configured to control the engine based on a result of the monitor unit, wherein the monitor unit includes an output determination unit that determines whether the output of the engine is excessive, and a change unit that changes in accordance with a warm-up state of the engine, the threshold.

Engine control device

A drive control apparatus in which the target torque which is a target value of an output torque of the prime mover for driving a vehicle, is calculated, and the output torque control is performed so that the output torque of the prime mover coincides with the target torque, is provided. An estimated output torque which is an estimated value of the actual output torque of the prime mover, is calculated, and the torque difference accumulated value which approximates a time-integration value of a torque difference between the target torque and the estimated output torque, is calculated. It is determined that an abnormality has occurred in the output torque control when the torque difference accumulated value exceeds a determination threshold value which is set to a constant value.

Drive control apparatus for prime mover

A control system for an internal combustion engine having a throttle valve disposed in an intake passage of the engine. A target intake air amount of the engine is calculated, and an intake pressure of the engine is estimated. A wide-open intake air amount is calculated according to the engine rotational speed, and a theoretical intake air amount is calculated according to the wide-open intake air amount and the intake pressure. The wide-open intake air amount is an intake air amount corresponding to a state where the throttle valve is fully opened, and the theoretical intake air amount is an intake air amount corresponding to a state where no exhaust gas of the engine is recirculated to a combustion chamber of the engine. further, an exhaust gas recirculation ratio is calculated using the theoretical intake air amount and the target intake air amount, and a target output torque of the engine is calculated using the target intake air amount and the exhaust gas recirculation ratio. The engine is controlled using the target output torque.

Control system for internal combustion engine

An apparatus and method for controlling charging and discharging of an energy storage device. If the charging voltage that is applied exceeds a restriction determining voltage, the power value at that time is held as the charging power upper limit value. In addition, by multiplying a restriction coefficient by the charging power upper limit value while gradually reducing the restriction coefficient until the voltage drops below a restriction removal determining voltage. By setting its result as a control target value of the charging power, the charging power is gradually restricted. In contrast, if the applied charging voltage drops below the restriction removal determining voltage, the charging power is conversely gradually restored to its original state using a control target value obtained by multiplying the restriction coefficient by the charging power upper limit value while gradually increasing the restriction coefficient until the voltage equals or goes above the restriction determining voltage.

Apparatus and method for controlling charging and discharging of an energy storage device

An electric motor control apparatus suppressing power loss caused by driving an electric motor acting as a motor with a generated output of an electric motor acting as a generator. The electric motor control apparatus comprises a PAM controlled motor selecting unit () for determining which of 'control pattern 1' and 'control pattern 2' should be executed by comparison in total power loss, where a voltage control unit on the power generation side () performs voltage transformation with a PWM control in a first inverter () and generates a drive voltage for a second electric motor () with a PAM control in a second inverter () in the control pattern 1 and a voltage control unit on the driving side () outputs a rectified voltage from a generated voltage of a first electric motor () without voltage transformation in the first inverter () and generates a drive voltage for the second electric motor () with a PWM control in the second inverter () in the control pattern 2.

Electric motor control apparatus

The object of the present invention is to provide a vehicle drive system which enables setting of appropriate start-up torque and restraining of progress of battery deterioration. A vehicle drive apparatus having an electric motor, which is driven with electricity supplied by a battery, for driving a vehicle or assisting it while driven by an engine includes: a temperature sensor for detecting the battery temperature, an discharge power upper limit setting means for setting an upper limit for discharge power of the battery depending on the battery temperature, a discharge power computing means for computing battery discharge power, a revolution speed sensor for detecting a revolution speed of the engine, a basic start-up torque setting means for setting basic start-up torque requirement depending on the revolution speed and a start-up torque adjust means for decreasing the start-up torque requirement if the discharge power exceeds the discharge power upper limit during engine start-up.

Vehicle drive apparatus, method and computer program

A control device for a hybrid vehicle which measures the degree of over-discharge of a battery depending on the temperature of the battery, and which performs control for protecting the battery. The control device for a hybrid for a hybrid vehicle which comprises an engine outputting driving power therefor, a motor connected to the engine and outputting auxiliary driving power for assisting the output of the engine, a battery supplying electrical power to the motor as well as storing electrical energy generated by the operation of the motor as a generator, and electrical loads being supplied energy generated from the motor and electrical energy from the battery, the control device comprising: a battery protection section for increasing the revolution rate of the engine or for stopping electrical supply to the electrical loads when it is determined that the battery is in an over-discharged state; a state of charge measuring section for measuring the state of charge of the battery; and a temperature measuring section for measuring the temperature of the battery, wherein the battery protection section increases the revolution rate of the engine in an idling mode when the state of charge of the battery is equal to or less than a first predetermined value which is determined depending on the temperature of the battery, and the battery protection section stops supplying electrical power to the electrical loads when the state of charge of the battery is equal to or less than a second predetermined value which is determined depending on the temperature of the battery.

Control device for hybrid vehicle

A state of charge (SOC) measuring apparatus for a battery device is provided capable of detecting accurate state of charge based on integrating charge and discharge current. The state of charge measuring apparatus carries out data substitution for displaying and controlling state of charge depending on the upper limit SOC or lower limit SOC. The integrated SOC obtained by integrating charge and discharge currents is corrected into the corrected SOC by the incremented corrected value incremented at every data substitution time. The state of charge measuring apparatus corrects the integrated SOC at every data substitution such that the difference between the integrated SOC and the corrected SOC becomes larger, and when the integrated SOC is smaller than the upper limit SOC and larger than the lower limit SOC, the corrected SOC is displayed on the display portion as the displaying and controlling SOC.

State of charge measuring apparatus for battery device

A control device for a hybrid vehicle that can avoid component damage due to such operation, and can continue driving smoothly even in the case that operation that does not occur during normal driving occurs. In the case that the main contactor , which has been turned ON, is turned OFF due to the ignition being turned OFF while the motor has a high rotation speed, and then the ignition is turned ON again, the engine control device controls engine so that the rotation speed of the engine becomes the rotation speed at which the voltage generated by regeneration of motor is equal to or below the withstanding voltage of the power drive unit . Subsequently, when the main contactor is turned ON by the engine speed falling, the engine control device controls the engine so that the engine speed becomes equal to or less than 7000 rpm.

Control device for a hybrid vehicle

A control device of a hybrid vehicle is provided, capable of detecting the over-discharge state of the battery and controlling the charging and discharging rates of the battery for protecting the battery. The control device of the hybrid vehicle comprises an engine which outputs propulsive force to the vehicle, a motor which is directly connected to said engine and which assists the output of the engine, a battery which supplies the electric power to said motor and which is charged by electric energy generated by activating said motor as a generator when the assisting driving force is not necessary, an electric load whose electric energy is supplied by electric power generated by the motor and the battery, and a battery protecting device which increases the rotation speed of said engine when the over-discharge of said battery is detected and which stops supplying the electric power to said electric load when the over-discharge further advances.

A hybrid vehicle includes a power drive unit which is quickly stopped without increasing the load on a motor control apparatus should a short develop inside the power drive unit. The power drive unit contains a self-protection circuit, which shuts off the control signals to the switching elements for a given interval, when the temperature of the switching elements reaches a certain temperature value or when the current flowing in the power drive unit reaches a certain current value. The self-protection circuit outputs a shorting signal to indicate the state of the self-protection caused by the shut off. The motor control apparatus detects shorting signals from the self-protection circuit, and responds by stopping the output of control signals, when the self-protection state is reported, is greater than a predetermined number of times or the cumulative time in the self-protection state reaches a predetermined time.

Hybrid vehicle

The present invention relates to a cooling fan failure detection apparatus for a hybrid vehicle. This apparatus comprises a cooling capacity calculation device which calculates a cooling capacity of a cooling fan provided in the hybrid vehicle; a battery heating value calculation device which calculates a heating value of a battery provided in the hybrid vehicle; an assumed temperature change calculating device which calculates an assumed temperature change of the battery based on the heating value and the cooling capacity; an actual temperature change calculating device which calculates an actual temperature change of the battery; and a failure determination device which determines whether the cooling fan is failing by comparing the assumed temperature change calculated by the assumed temperature change calculating device and the actual temperature change calculated by the actual temperature change calculating device.

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Wako, Japan

Shinobu Ochiai