Hitachi, Ltd.

Hitachi Car Engineering Co., Ltd.

Other

Yutaka Takaku

Toshio Ishii

Nobuo Kurihara

Kazuya Kawano

Hiroshi Kimura

Minoru Ohsuga

Shinji Nakagawa

Kiyoshi Miura

Akihito Numata

Takashi Mukaihira

Toshiharu Nogi

Eisaku Fukuchi

Yoshihisa Fujii

Rogelio B Agustin

Toshio Ihshii

Shigeru Kawamoto

Masatoshi Hoshino

Yoichi Iihoshi

Minoru Oosuga

Kozo Katogi

Hideki Miyazaki

Nobuyasu Kanekawa

Noboru Tokuyasu

Takuya Shiraishi

Hiroyuki Sakamoto

Satoru Kaneko

Shiho Izumi

Toshio Hori

Toshio Manaka

Kohei Sakurai

Toshifumi Usui

Yoko Nakayama

Toshihiro Aono

Mineo Kashiwaya

Minoru Osuga

Yuichi Kashimura

Tadao Osawa

Naoyuki Tanaka

Sigeo Tamaki

Hiroyuki Takamura

Kouzou Katogi

Shozo Yanagisawa

Hirotoshi Kawano

Daisuke Yamamoto

A vehicle includes an internal combustion engineand a rotating electric machineas drive power sources and drives a wheel using a driving force of the internal combustion engineand/or the rotating electric machine. A diagnostic control unitdiagnoses the vehicle while controlling the same. The diagnostic control unitshifts an operating point of the internal combustion engineto a plurality of diagnostic operating points to diagnose a catalyst or an oxygen sensor. Meantime, the diagnostic control unitcompensates for an excess or a deficiency in the driving force of the internal combustion engineaccompanied by the shift of the operating point by letting the rotating electric machineperform a power running or regeneration operation.

Vehicle diagnostic control apparatus

This invention provides a vehicle control apparatus constructed so that during the control of a downshift for deceleration, braking shocks can be reduced and the amount of energy regenerated can be increased, and a hybrid vehicle equipped with the control apparatus. The hybrid vehicleincludes wheels, an engine, a motor, a multi-stage transmissionthat reduces motor torque and transmits the reduced torque to the wheels, and a brakethat brakes the wheels. During deceleration downshift control, a hybrid control moduleprovides distribution control of the regenerative torque of the motorand the braking torque of the brakeso that the total braking force of the vehicle during gear shifting matches a target value.

Vehicle control apparatus and vehicle equipped with the control apparatus

A control apparatus for controlling a rotational electric machine and a driving apparatus for a vehicle that includes an AC motor that rotates wheels and is driven by a power supplied from a battery, an instant variation detecting unit provided in a motor controller that detects a instantaneous variation of a current or voltage of the battery, and a current command operating unit that changes a current command signal for current to be sent to the AC motor, such that an internal loss of the AC motor is increased, by using an internal-loss-increase-use Id&#xb7;Iq table.

Control apparatus for rotational electric machine and driving apparatus for vehicle

The present invention provides a vehicle diagnostic system comprising an electronic control unit for controlling and monitoring vehicle equipment, a radio communication means for transmitting a vehicle diagnostic information to a telecommunication equipment located outside the vehicle or for communicating between the vehicle and the telecommunication equipment located outside the vehicle and for transmitting a communication diagnostic signal to the electronic control unit and receiving a response signal to the communication diagnostic signal, and a communication line for connecting the electronic control unit and the radio communication means wherein the response signal is utilized to determine if the communication line is properly functional.

Vehicle diagnostic system

A diagnostic equipment for an exhaust gas cleaning apparatus installed for an engine, comprising a misfire detector which detects the misfire of the engine, and a secondary-air-system failure detector which detects the failure of a secondary air system. An index corrector corrects a deterioration index calculated by a deterioration-index calculator, in accordance with the detected result of the detector. A deterioration decision unit decides if the diagnostic equipment has failed, by the use of the corrected deterioration index. In a case where the extent of the misfire or the like is severe, a decision interrupter interrupts the decision of the deterioration decision unit. Thus, even when the misfire of the engine or the failure of the secondary air system has occurred, the detection of the deterioration of a catalyst does not err. It is therefore avoided to erroneously replace the catalyst which has not deteriorated yet, or to run the engine in spite of the deterioration of the catalyst.

Diagnostic equipment for an exhaust gas cleaning apparatus

A misfire detector is provided that is accurate even in the case of a disturbance due to causes such as driving on a rough road. The misfire detector is equipped with a crankshaft revolution detector to measure the time period required for the crankshaft of an internal-combustion engine to revolve for a given angle. A signal-processor is also provided for detecting the misfiring of the internal-combustion engine by processing the time period. In one embodiment, the misfire detector has two filters having the same sensitivity to the misfire frequency, and differing in the sensitivity to frequencies adjacent to said misfire frequency. It can be determined that a misfire has occurred if the ratio or difference between the outputs of the two filters stays within a fixed range and one or both of the filters have respective outputs exceeding a threshold value.

Misfire detector

In an internal combustion engine diagnosis apparatus comprising a cleanup catalyst arranged on an exhaust pipe of an internal combustion engine and an HC adsorption catalyst arranged downstream of and in parallel to the cleanup catalyst, degradation and failure of the HC adsorption catalyst is accurately diagnosed. The internal combustion engine diagnosis apparatus comprising the cleanup catalyst arranged in the exhaust pipe of the internal combustion engine; and the HC adsorption catalyst arranged in parallel to and downstream of the cleanup catalyst, during high temperature period the HC adsorption catalyst desorbing and cleaning up HC desorbed during low temperature period, wherein degradation of the HC adsorption catalyst is diagnosed based on a gradient of temperature of the HC adsorption catalyst during a period when temperature of the HC adsorption catalyst is within a range of 50&#xb0; C. to 250&#xb0; C.

Diagnosis apparatus for internal combustion engine

A combustion state is diagnoses by extracting specific rotation period component of a period synchronous with rotation from a combustion state parameter for at least two rotations. The combustion state is judged on the basis of the extracted specific rotation period component. The combustion state parameter may be the engine speed or the output torque of a multiple-cylinder engine which varies according to the combustion state of the engine.

Combustion state diagnosing system and combustion state diagnosing method for diagnosing engine and recording medium

A diagnosis apparatus for diagnosing a catalytic converter of a motor vehicle as to whether the catalyst suffers deterioration by estimating a temperature of the catalyst or that of the exhaust gas in the vicinity of the catalyst on the basis of a plurality of engine parameters to thereby decide deterioration of the catalyst by using as an index the estimated temperature. Diagnosing method and apparatus capable of diagnosing deterioration of the catalyst with a high reliability are realized.

Method and apparatus for diagnosing engine exhaust gas purification system

An air-fuel ratio correction coefficient calculating component is provided to an air-fuel ratio controller for an engine having the wide range air-fuel ratio sensor. In order to compensate for a time lag in detection of an air-fuel ratio detected by the wide range air-fuel ratio sensor from the time when a mixed gas of the air-fuel ratio is supplied to the engine, the air-fuel ratio controller includes a component for calculating an air-fuel ratio correction coefficient to control an amount of fuel supplied to the engine based on an output signal of the air-fuel ratio sensor. The air-fuel ratio correction coefficient calculating component calculates the air-fuel ratio correction coefficient based on a nonlinear calculation element. The non-linear calculation element has an ON-OFF characteristic, a neutral zone characteristic, a saturation characteristic or a characteristic combining a plurality of characteristics selected from the above-mentioned characteristics.

Air-fuel ratio controller for engine

In order to provide a system that lower NOx emission and an improved fuel consumption are obtained by making the igniting control possible in the wide operation range by performing the fuel injection and the ultra lean burning with the homogeneous air-fuel mixture, in the engine having the compression igniting mode, in the in-cylinder fuel injection engine having the compression igniting mode, means for performing the first fuel injection for the initial combustion speed control before igniting and the second fuel injection for the engine torque control after that, are provided. The second fuel injection ratio for the engine torque control is increased according to the engine torque. Furthermore, in order to improve the igniting, the igniting trigger means is provided in the in-cylinder fuel injection engine having a compression igniting mode and the igniting trigger is added by the igniting trigger means after the first fuel injection.

Engine control system for controlling in-cylinder fuel injection engine

A combustion control device for an internal combustion engine, establishes an optimum combustion condition by detecting the combustion pressure in the cylinder and controlling the exhaust gas reflux rate, the ignition timing and the fuel injection timing or the injection rate at the intake stroke in order to improve the fuel economy and the quality of the exhaust gas in the engine. The device is provided with an in-cylinder pressure detector for detecting the in-cylinder pressure in connection with the combustion in the engine, and apparatus for estimating the heat generation rate with respect to the angle of the crank shaft of the cylinder according to the output from the in-cylinder pressure detection means, the ignition timing and the fuel injection timing control the control variables such as EGR control parameters related to the combustion so that the in-cylinder combustion state pattern obtained by the heat generation rate estimation apparatus may be reshaped into a predefined waveform pattern.

Engine combustion control device

Engine exhaust gas cleaning system

Growing community of inventors

Mito, Japan

Yutaka Takaku