Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Kenichiro Kimura

Yoshikazu Murakami

Masashi Kitagawa

Satoshi Aoyagi

Dai Saitoh

Asao Uenodai

Hiroaki Takanohashi

Yuji Saito

Kiyoshi Kimura

Chihiro Wake

Sachito Fujimoto

Hibiki Saeki

Kenichiro Ueda

Hiroyuki Abe

Takahiro Iwata

Kazunori Watanabe

Daishi Igarashi

Iwao Shimane

Shugo Kondo

Shinji Yoshikawa

Toru Namiki

Kazuo Kotaka

Yasuo Kima

Satoru Adachi

Hajime Kondou

Hiroshi Yoshikawa, Legal Representative

An electric vehicle includes a device which determines, on the basis of the gradient of a road surface, a target acceleration of the vehicle in the case where the operational states of an accelerator (gas) pedal and a brake pedal of the vehicle are an OFF state when the vehicle is traveling on a down-slope road, a device which determines the correction amount of a regenerative torque for bringing the actual acceleration of the vehicle close to the target acceleration, a device which determines a basic target torque of an electric motor, which becomes a regenerative torque when the operational state of the accelerator (gas) pedal is the OFF state, on the basis of the operational state of the accelerator (gas) pedal, and a device which determines a target torque by correcting the basic target torque on the basis of at least the aforesaid correction amount. The output torque of the electric motor is controlled to the determined target torque. Thus, when the electric vehicle travels on the down-slope road, the regenerative operation of the electric motor is accomplished such that an acceleration suited to the gradient of the road surface can be generated in the vehicle while minimizing the influences of disturbance factors.

Electric vehicle and regeneration control method for electric vehicle

This fuel efficiency display device for a fuel cell vehicle includes: a first interval vehicle efficiency obtaining device which obtains a first interval vehicle efficiency being a fraction of a generated traveling energy with respect to a consumed fuel amount in a predetermined first time-interval; a second interval traveling energy obtaining device which obtains a second interval traveling energy being a traveling energy generated in a predetermined second time-interval which is shorter than the first time-interval; and a second interval fuel efficiency obtaining device which obtains a second interval fuel efficiency being a fuel efficiency in the second time-interval, based on at least the first interval vehicle efficiency and the second interval traveling energy.

Fuel efficiency display device for fuel cell vehicle, and fuel efficiency displaying method for fuel cell vehicle

This control method for a fuel cell vehicle includes: a target motor output power obtaining step which obtains a target motor output power corresponding to an accelerator opening degree; and a high output power control step which controls operations of a first DC-DC converter and a second DC-DC converter, such that an output voltage of a power source becomes equal to or larger than a predetermined voltage that is required for securing a desired motor output power, when the target motor output power is larger than a predetermined output power threshold value.

Control method for fuel cell vehicle, and fuel cell vehicle

A current limiting system for fuel cells includes a target current limit value setting device which sets a target current limit value for limiting the generated current taken out from the fuel cell stack in accordance with the cell voltage, and a current limit value setting device which sets a current limit value by replacing a present current limit value with the target current limit value when a difference between the present current limit value and the generated current value becomes smaller than a first predetermined value. The system also includes an output device which outputs the current limit value either to a current limiter for limiting the generated current in accordance with the current limit value or to an electric power consumption controller for controlling electric power consumption of loads that consume the generated current.

Current limiting system and current limiting method for fuel cells

A fuel cell system has a fuel cell, a gas supply device and an electronic control unit. The gas supply device supplies a scavenging gas to the fuel cell. The electronic control unit controls scavenging of the fuel cell with the scavenging gas when a request for discontinuing power generation is given to the fuel cell. A humidification control device for controlling humidification of the scavenging gas and a cooling control device for controlling cooling of the scavenging gas are provided in a passage connecting the gas supply device and the fuel cell.

Fuel cell system and method of discontinuing same

The present invention intends to provide a control device for a fuel cell vehicle which suppresses the deterioration of driveability upon acceleration without increasing the size of a driving electric motor or a motor driver. When a requested output (PD_CAL) exceeds a first output limit determined depending on a continuous output rating of an electric motoror a motor driverand an increasing rate of the requested output (PD_CAL) exceeds a reference increasing rate, an upper-limit target output determining unitdetermines an assist time used as a time during which the electric motorcan be operated continuously by the requested output (PD_CAL) on the basis of the requested output (PD_CAL) and an open-circuit voltage (Vbat_o) of a battery. Until the assist time is elapsed, the upper-limit target output (PD_LMT) is set to a second output limit (&#x3e;the first output limit) determined depending on a short-time output rating of the electric motoror the motor driver

Control device for fuel cell vehicle

The present invention intends to provide a control device for a fuel cell vehicle which suppresses the deterioration of driveability upon acceleration without increasing the size of a driving electric motor or a motor driver. When a requested output (PD_CAL) exceeds a first output limit determined depending on a continuous output rating of an electric motoror a motor driverand an increasing rate of the requested output (PD_CAL) exceeds a reference increasing rate, an upper-limit target output determining unitdetermines an assist time used as a time during which the electric motorcan be operated continuously by the requested output (PD_CAL) on the basis of the requested output (PD_CAL) and an open-circuit voltage (Vcap_o) of a capacitorUntil the assist time is elapsed, the upper-limit target output (PD_LMT) is set to a second output limit (&#x3e;the first output limit) determined depending on a short-time output rating of the electric motoror the motor driver

A control apparatus for an electric vehicle is provided, which is capable of reducing the weight of the electric vehicle and preventing the inverter circuit from overheating. When the vehicle stops on an uphill due to stalling, the control unit starts counting the time over which current is supplied through the same IGBT element. When the count value reaches a value corresponding to the time at which the IGBT starts generating heat, the control unit outputs a control signal to reduce the motor driving current to the IPM . The rotation sensor detects the rotational position when the motor rotates in the reverse direction, while the reduction of the motor driving current reduces the driving power of the motor. Based on the detection of the rotational position, the control unit performs switching of the phase of the IGBT , and when the normal current supply phase is connected, the motor driving current which drives the motor is increased.

Control apparatus for electric vehicle

In an electric parking lock device having a motor for generating a drive force for engagement and release of a parking lock pawl from a parking lock gear in response to a command output from a selector switch. A compression spring if used for applying a force so as to release the parking lock pawl from the parking lock gear. A shift arm is provided on a side which is closer to an input end of the parking lock pawl than to the compression spring, whereby when driving of the parking lock pawl in a lock releasing direction is effected, the motor side and the parking lock pawl side are connected directly, while when driving the parking lock pawl in a lock effecting direction, the compression spring is interposed between the motor side and the parking lock pawl, so that a manual lock release operation can be performed within a range where the compression spring is allowed to be deflected irrespective of the state of the motor.

Electric parking lock device

Disclosed herein is a method of and an apparatus for limiting electrical loads due to electrical equipment on an electric vehicle. In the electrical load limiting apparatus, a desired running distance is inputted by a desired running distance inputting device and a depth of discharge of a battery is detected by a battery condition detecting device. Ambient environment data for the electric vehicle are obtained from an illuminance sensor, a temperature sensor and a raindrop sensor. An arithmetic device is activated to determine and compute running conditions on the basis of the desired running distance, the depth of discharge and the ambient environment data. The electrical loads are controlled by an electrical load limiting device based on the result of the determination by the arithmetic device. Since the electrical loads are limited based on the running conditions, an accurate judgment can be made, based on the ambient environment, as to whether or not the electric vehicle can cover the inputted desired running distance.

Method of and apparatus for limiting electrical loads on an electric

A vehicle electrical-load limiting apparatus wherein the priority given over a plurality of electrical loads, for restricting the driving of the electrical loads mounted on a vehicle, is first decided in order of importance and the amount of drive restriction of each of the electrical loads is then determined based on the remaining capacity of a vehicle electric source, thereby restricting the driving of the electrical loads. A fuzzy inference is carried out by making use of membership functions corresponding to both (a) the deviation indicative of the difference between a standard value set for each electrical load attached to the vehicle and a value of an electrical load when now in use, and (b) the residual capacity of the electric source. Then, the amount of the drive restriction of each of the electrical loads is obtained from the result of the fuzzy inference. It is therefore possible to automatically determine to what degree the driving of the electrical loads should be restricted according to the degree of the residual capacity of the electric source.

Vehicle electrical-load limiting apparatus

A running performance control apparatus suitable for use in an electric vehicle, which is capable of restricting the running performance of the vehicle when the capacity of a battery of the vehicle is reduced to the preset residual capacity. The battery capacity reduced to the preset residual capacity is detected and a vehicle running state including the speed of a running vehicle and the acceleration of the vehicle, is detected. An operating state, including shift positions of a transmission of the vehicle and the degree of opening of a vehicle accelerator is detected. When the battery capacity is reduced to the preset residual capacity, it is determined whether the vehicle running state should be restricted. If the answer is determined to be Yes, then information indicative of the contents of a desired restriction datum of the running performance can be read from a storing device storing a plurality of restriction data each used to restrict the running performance of the vehicle on the basis of information indicative of the running state detected by a running state detecting device, and of information indicative of the operating state detected by an operating state detecting device, thereby making it possible to restrict the running performance of the vehicle.

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Wako, Japan

Kenichiro Kimura