Hitachi, Ltd.

Nissan Motor Company Limited

Hitachi Car Engineering Co., Ltd.

Hitachi Automotive Engineering Co., Ltd.

Hitachi Automotive Engineering, Ltd.

Other

Suzuki Jidosha Kogyo Kabushiki Kaisha

Hitachi Automotive Eng. Co., Ltd.

Takeshi Atago

Masami Nagano

Toshio Manaka

Toshio Hori

Kousaku Shimada

Masahide Sakamoto

Motohisa Funabashi

Teruji Sekozawa

Osamu Kuroda

Yasunori Mouri

Toshio Ogawa

Masakatsu Fujishita

Makoto Shioya

Nobuo Kurihara

Masahiro Toyohara

Seiji Suda

Yuichi Kitahara

Mikihiko Onari

Akio Honji

Noriko Watanabe

Toshio Ishii

Minoru Osuga

Tokuo Kosuge

Taiji Hasegawa

Tatsuya Yoshida

Keiichi Mashino

Suetaro Shibukawa

Hisao Yamashita

Junichi Ishii

Teruo Yamauchi

Matsuo Amano

Mamoru Nemoto

Shigeyuki Yoshihara

Toshio Furuhashi

Osamu Abe

Yoshiya Takano

Hisanori Moriya

Shoji Shimo

Mikihiko Ohnari

Kimio Hoshi

Hiroshi Kimura

Yoshishige Oyama

Takao Sasayama

Yutaka Nishimura

Kenji Ikeura

Yoshiyuki Yoshida

Shinichi Sakamoto

Shigeru Azuhata

Sadayasu Ueno

Mamoru Fujieda

Takao Ishikawa

Yoshihisa Kawamura

Seiji Asano

Yoshikazu Hoshi

Mineo Kashiwaya

Hiroatsu Tokuda

Shinsuke Nakazawa

Shunichi Mitsuishi

Katsuya Oyama

Hiroshi Miyadera

Junji Miyake

Hidehiro Iizuka

Masahiro Soma

Kanemasa Sato

Toshiro Abe

Kimiji Karino

Toshifumi Hiratsuka

Hiroshi Hanaoka

Yuichi Mori

Yasuhiko Fujiwara

Junichi Makino

Hiroshi Tobita

Shigeyuki Nonomura

Tadahiko Otani

Kouji Hosokawa

Yukio Hosho

Katsuo Saitoh

Shinichi Ichikawa

Atsunori Hashimoto

Shimada Kousaku

Takayuki Kido

Toshiro Nomura

Seiichi Kikuchi

An engine control device provided with a lean NOx catalyst comprises means for estimating a condition of the lean NOx catalyst, means for performing reactivation control of the lean NOx catalyst based on the result, and means for controlling the termination of the reactivation control. The lean NOx catalyst is constantly made usable in a favorable condition.

Engine control device

To perform the proper control conforming to the intent of a driver of an automotive vehicle under any condition which is encountered by the vehicle, optimum control methods are preliminarily classified in accordance with categories relating to conditions of the vehicle and categories relating to intents of the driver and the classified optimum control methods are stored in a memory, thereby selecting one of the control methods corresponding to the combination of the categories to which the vehicle condition and the driver's intent detected during the running of the vehicle belong.

Condition adaptive-type control method for internal combustion engines

A control device employing a computer readable program code, for an engine is provided with an electromagnetic actuator controlling opening and closing operation of an intake valve in response to an electric driving signal. The device determines a target A/F based on a signal corresponding to a requested engine output value and a signal representing a driving condition of the engine, determines a requested intake air flow of a cylinder of the engine based on the signal representing a driving condition of the engine and the target A/F, and determines control values for opening and closing operation of an intake valve based on the requested intake air flow and the target A/F. The control values include at least one of a valve opening timing, a valve opening time and a maximum valve lifting amount of the intake valve. Electric driving signals are generated according to the control values.

Control device for engine provided with electromagnetic driven intake valves and computer useable medium having computer readable program code for performing the control

When a pulse width limitation control is carried out, an air-fuel ratio feedback correction control such as O,feedback or an A/F (air-fuel ratio) learning correction control is prohibited or limited. When the pulse width limitation control is carried out, various kinds of factors for carrying out a basic injection amount are made a prohibition condition or a limitation condition, and when other operation conditions arise, the operability is not damaged.

Fuel injection control apparatus and fuel injection method

A control apparatus for an engine includes a burn mode determining unit for determining a stoichiometric burn mode or a lean burn mode, and a stratified charge burn mode or a homogeneous charge burn mode. A target A/F calculating unit calculates a target A/F according to the operational point of the engine and a phase lag filter changes the phase of said calculated target A/F. A first target A/F modifying unit modifies the target A/F whose phase is delayed, so that an unstable burn region is avoided and a second target A/F modifying unit further modifies the modified target A/F during a transitional period when the operation is switched so as to avoid the unstable region. A target A/F selecting unit selects one of the modified A/F modified by the first target A/F modifying unit and the target A/F modified by the second A/F modifying unit.

Control apparatus for a direct injection engine and control method of

A failure diagnosis apparatus for an internal combustion engine having an intake air swirl control valve, includes a broken wire detection unit, a target opening degree/actual opening degree deviation detection unit, an opening degree abnormally detection unit and a target opening degree execution abnormality detection unit. Outputs from these detection units are used to detect a failure of the swirl control valve which becomes a factor for inviting an aggravation of an operability such as a knocking etc.

Control apparatus for use in internal combustion engine

An engine fuel supply apparatus is provided with an accident judging device for effecting accident judgement in a fuel control system under the conditions that the fuel pressure regulator driver is subjected to feedback control of the fuel pressure, and that there is a change in the fuel pressure and the change continues for a predetermined time of period within a set time range.

Engine fuel supply apparatus

An electronic engine control system for a lean burn engine includes a unit for detecting an amount Qa of intake air fed into a cylinder of the engine, a unit for detecting an engine speed Ne, a unit for calculating a basic fuel injection pulse width TPbas on the basis of the intake air amount Qa and the engine speed Ne, and a unit for determining control parameters containing any of at least an air-fuel ratio, an ignition timing, a fuel injection timing, a throttle opening and an EGR rate in accordance with an operating state of the engine in optimum. A reference TPref having the same dimension as the basic fuel injection pulse width TPbas and which is a function of an accelerator operating amount determined on the basis of the accelerator operating amount is determined as a load parameter used upon determination of the control parameters of the engine in operation with a lean air-fuel ratio. Because the accelerator opening amount is inputted to calculate the reference .sub.Tpref so that the throttle opening is controlled, the measurement accuracy of the accelerator opening and throttle opening amounts can be ensured, particularly in a vicinity of the completely closed state of the throttle where the increasing rate of intake air to throttle opening exists.

Control apparatus and control method for lean burn engine and engine

A controller of a direct injection engine is basically provided with a swirl control valve arranged in an air intake port portion, a fuel injection valve and a variable fuel pressure regulator, further provided with means for controlling fuel pressure by the variable fuel pressure regulator, means for detecting operational conditions and means for detecting a combustion state, and still further provided with means for controlling a valve opening of the swirl control valve on the basis of the operational conditions and the combustion state.

Direct injection engine controller

An exhaust gas purifying catalyst is provided for purifying NOx contained in an exhaust gas from an internal combustion engine of a vehicle operated at a high air fuel ratio due to excessive oxygen, using unburnt HC or CO in the exhaust gas as a reducing agent. The catalyst comprises platinum, strontium and a rare earth metal, as active components, each supported on a support of inorganic oxide. The active components of the catalyst include platinum of 0.01-3.7 by wt ratio, strontium of 0.01-55 by wt ratio and a rare earth metal of 0.01-36 wt ratio, per the inorganic oxide of 100 by wt ratio.

Exhaust gas purifying method and catalyst used therefor

An engine control device comprising has a processor which receives a variety of operating state detection signals (such as an engine crank angle signal and an accelerator opening signal) and computes control quantities for an interrupt routine on the basis of a predetermined signal such as the engine crank angle signal or a signal generated at fixed basic intervals, in accordance with a predetermined program during a period of time between the predetermined signals. A means is provided for counting and/or limiting the number of times interrupt processing triggered by an activation signal for the routine is executed during the period of time between the predetermined signals whenever processing of the routine exists.

Engine control device having an arrangement for limiting interrupt

An electronic engine control system for a lean burn engine includes a unit for detecting an amount Qa of intake air fed into a cylinder of the engine, a unit for detecting an engine speed Ne, a unit for calculating a basic fuel injection pulse width TPbas on the basis of the intake air amount Qa and the engine speed Ne, and a unit for determining control parameters containing any of at least an air-fuel ratio, an ignition timing, a fuel injection timing, a throttle opening and an EGR rate in accordance with an operating state of the engine in optimum. A reference TPref having the same dimension as the basic fuel injection pulse width TPbas and which is a function of an accelerator operating amount determined on the basis of the accelerator operating amount is determined as a load parameter used upon determination of the control parameters of the engine in operation with a lean air-fuel ratio.

In a direct injection internal combustion engine, a stratification combustion condition, a homogeneous combustion condition and an intermediate combustion condition which is intermediate the stratification combustion and the homogeneous combustion conditions are controlled selectively according to an operation condition of at least one selected from a combustion condition, an output condition of the engine and an acceleration condition of a vehicle. Without defeating an intended low fuel consumption operation, the engine operates to obtain a reduction of harmful exhaust gas. As a result, by assuring the low fuel consumption operation, an improvement in combustion stability and smoke reduction can both be realized.

Direct injection system internal combustion engine controlling apparatus

A system for purifying an exhaust gas for use in an automobile is disclosed which does not externally discharge unburnt hydrocarbons until a catalyst becomes active. An adsorbent is provided upstream of the catalyst. A heat exchanger is disposed between an upstream portion of the adsorbent and a portion between the adsorbent and the catalyst for controlling the elevation of the temperature of the adsorbent and for promoting the elevation of the temperature of the catalyst. The unburnt hydrocarbons are absorbed by the adsorbent 4 in the initial period of time from starting of an engine until the catalyst 8 becomes active. Temperature control is made in such a manner that the unburnt hydrocarbons which are adsorbed by the adsorbent 4 begins to be desorbed therefrom substantially simultaneously with the time when the catalyst 8 begins to function. A large quantity of unburnt hydrocarbons which are emitted from an engine immediately after the starting of the engine are prevented from being externally discharged without being treated.

System for purifying exhaust gas for use in an automobile

Growing community of inventors

Katsuta, Japan

Takeshi Atago