Nippon Soken, Inc.

Nippondenso Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Other

Denso Corporation

Kureha Corporation

Toyoda Jidosha Kabushika Kaisha

Tokio Kohama

Hideki Obayashi

Hisasi Kawai

Tsuneyuki Egami

Toshikazu Ina

Hidetaka Nohira

Kimitaka Saito

Tohru Yoshinaga

Tadashi Ozaki

Kenji Kanehara

Akira Nishimatsu

Tadashi Hattori

Takeshi Matsui

Kiyoshi Kobashi

Takashi Shigematsu

Tsutomu Saito

Norihito Tokura

Hiroshi Yorita

Yoshitaka Nishio

Hiroshi Takahashi

Kunihiko Sato

Seiichi Narita

Daisaku Sawada

Masao Kano

Setsuo Tokoro

Shinichi Okabe

Kazuhiko Miura

Kiyohiko Watanabe

Hideaki Itakura

Yasuyuki Kawabe

Yasuyuki Satou

Kouzi Ohara

Yukio Iwasaki

Minoru Nishida

Naoya Kato

Seizi Huzino

Kazuto Maeda

Yurio Nomura

Katsuyuki Tanaka

Masanori Kato

Hiroyuki Goto

Toshihiko Igashira

Koichi Ito

Hikaru Sugi

Tokuta Inoue

Tatsuo Kobayashi

Toshiaki Nakayama

Yasutoshi Yamanaka

Takamichi Nakase

Nobuhiko Koyama

Yukihiro Kato

Takayuki Hayashi

Yasuhiko Ishida

Masaki Takeyama

Kiyohiko Oishi

Takehiko Kato

Shingo Morishima

Tatsuo Sugimoto

Hisamitsu Yamazoe

Yukio Suzuki

Masatoshi Ikeda

Yoshifumi Watanabe

Isao Hattori

Kazuyuki Horie

Masaaki Yano

Kenichi Yamamoto

Hiroyuki Aota

Yoshihiro Miyaji

Nobuo Imatake

Yoshihiro Nakase

Hiroyuki Fukunaga

Susumu Nogami

Syuzaburo Tashiro

Toshiaki Yamaura

Yasuyuki Sato

Toshiaki Agui

Katuo Azegami

Satoshi Kameyama

Ryuichi Matsushiro, Deceased

Yoshimitsu Inque

Katsuo Azegami

Naoya Katou

Kazutaka Hasegawa

Takayoshi Ito

Souichi Matsusita

Isamu Okada

Tamio Yokoyama

Katsuhiko Arisawa

Kiyohito Watanabe

Shigeo Nomura

Shuji Mizutani

A pressure detecting apparatus having a pressure introducing pipe is installed on an intake surge tank for detecting inner pressure in the intake surge tank. The intake surge tank is provided with a throttle passage having a throttle is disposed in the intake surge tank along a flow direction of the gas for increasing a flow speed of the gas. A pressure inlet at a leading end of the pressure introducing pipe is positioned in a vicinity of the throttle.

Pressure detecting apparatus and installation structure of same

To excellently grow flame kernel while lowering breakdown voltage, a bypass electrode comprising a semiconductor material is installed in a path bypassing an inductive spark gap between a center electrode and a ground electrode, and the center electrode and the ground electrode are electrically connected by the bypass electrode and capacitive discharge is carried out by applying breakdown voltage between the center electrode and the ground electrode via the bypass electrode, and thereafter, inductive discharge is carried out through the inductive spark gap.

Spark plug having a bypass electrode extending along a bypass path between center and ground electrode

A delivery pipe of a fuel supply system for injectors mounted on a cylinder head is divided for each injector or a group of injectors. Divided pipe parts are coupled with each other through a flexible member to allow flexing of the delivery pipe. Each injector is connected with the delivery pipe through a flexible coupling member and with the cylinder head through a flexible cushioning member. Alternatively, a fuel passage is formed in the cylinder head in place of the delivery pipe to supply fuel to the injectors after heating in the cylinder head.

Fuel supply system for internal combustion engines having fuel leakage restricting structure

An abnormal combustion detection apparatus for an internal combustion engine quickly detects the occurrence of preignition by using a knock sensor. When the knock sensor detects an engine knocking, the ignition timing is delayed. If despite the delay of ignition timing, the knocking is not decreased and the air-fuel ratio detected after the delay of ignition timing is less than the air-fuel ratio detected before the delay of ignition timing, it is determined that preignition has occurred.

Abnormal combustion detection apparatus and method for internal

An apparatus for detecting a condition of burning in an internal combustion engine includes a pair of opposed electrodes provided in a combustion chamber of the engine, and an AC voltage applying device for applying an AC voltage between the opposed electrodes. A current detecting device is operative for detecting a current flowing between the opposed electrodes. A current generating means for generating a current-representing signal depending on the detected current, the current generating means having a differentiating circuit for differentiating the AC voltage into the capacitance-current representing signal. In another aspect of this invention, the apparatus further comprises calculating means for calculating ratios between a parameter represented by the burning-ion current representing signal and a parameter represented by a signal depending on the AC voltage applied between the opposed electrodes. A waveform processing device is operative for removing the capacitive current component from the current-representing signal to extract a burning ion current component, and for generating a burning-ion-current representing signal depending on the extracted burning ion current component. The capacitive current component occurs in correspondence with the AC voltage. One aspect of the invention utilizes calculating means for calculating a ratio between a parameter represented by the burning-ion-current representing signal and a parameter represented by a signal depending on the AC voltage applied between opposed electrodes. The burning ion current component corresponds to a burning ion current which flows between the opposed electrodes. A burning condition detecting device is operative for detecting a condition of burning in the combustion chamber of the engine on the basis of the burning-ion-current representing signal generated by the waveform processing device. The waveform processing device includes an integration processing device for integrating the current-representing signal to generate the burning-ion-current representing signal.

Apparatus for detecting a condition of burning in an internal combustion

A fuel injection control device in a cylinder direct injection engine which switches between premixed combustion by intake stroke injection and stratified combustion by compression stroke injection in accordance with a change of an engine speed or a required load, where an unpleasant torque shock occurring when the injection mode is changed and the combustion state is changed despite the vehicle operating in the driving pattern such as driving on an upward slope or downward slope is prevented by maintaining the same injection mode while the vehicle continues to operate in the same driving state and where stratified combustion by the compression stroke injection is carried out when the vehicle is in driving on a downward slope, but is augmented by intake stroke injection when the vehicle sharply accelerates and the torque becomes insufficient.

Fuel injection control device of cylinder direct injection engine

A combustion monitoring apparatus for an internal combustion engine is provided which includes a voltage supply circuit, a combustion monitoring circuit, and a control circuit. The voltage supply circuit applies the voltage to plug electrodes of a spark plug mounted in a combustion chamber of the engine. The combustion ion monitoring circuit monitors a variation in amount of combustion ions existing between the plug electrodes to determine a combustion condition of the engine based on the current flowing through the plug electrodes produced by application of the voltage to the electrodes. The control circuit controls an operation of the voltage supply circuit so that the voltage is applied across the plug electrodes prior to a discharge duration of a spark plug mounted in the combustion chamber of the engine for monitoring preignition.

Combustion monitoring apparatus for internal combustion engine

An apparatus for preventing flow noise which suppresses the noise caused at the time of opening of a throttle valve provided in an intake passage of an internal combustion engine etc. At the downstream side of a pair of clearances formed at the top and bottom when the throttle valve opens, a means is provided acting on the flows of air passing through at least one of the clearances to reduce the flow rate and acting on the flows to cause the point of convergence of the flows of air passing through the pair of clearances to shift to the downstream side.

Apparatus for preventing flow noise in throttle valve

A combustion monitoring apparatus for an internal combustion engine is provided which is designed to distinguish abnormal combustion conditions from a normal combustion conditions using a combustion ion current included in a current flowing through plug electrodes of a spark plug, resulting from motion of ions between the plug electrodes which are produced by combustion. For example, if a maximum value of the combustion ion current during one combustion cycle is smaller than a given value, it is determined that a misfire has occurred. If an attenuation time from generation of the current flowing through the plug electrodes until a variation in the current is decreased to a given value is shorter than a given time period, it is determined that a flame has been blown out before combustion is completed.

A canister for use in an evaporative emission control system of an automotive vehicle is provided which includes a box-like casing, an inlet port formed in one end wall of the casing through which fuel vapors generated within a fuel tank are drawn into the canister, and a plurality of vapor-adsorbing passages each of which is filled with activated carbon and has a given length through which the fuel vapors drawn through the inlet port flow. The vapor-adsorbing passages are all arranged within said casing in parallel to each other. This arrangement allows the casing to be of a flat shape which facilitates easy installation of the canister within a flat space around a fuel tank.

Canister for use in evaporative emission control system for automotive

An antidiffusion layer is provided between a first fuel adsorption layer communicated with a fuel tank and a second fuel adsorption layer communicated with air. Since adsorbing ability of the antidiffusion layer is lower than that of the first and second fuel adsorption layers, pore diffusion of the fuel vapor from the first fuel adsorption layer to the second fuel adsorption layer is reduced. Since the antidiffusion layer forms a plurality of nonlinear passages, air diffusion of the fuel vapor is reduced. Therefore, the diffusion of the fuel vapor is suppressed with a thin, small and simple antidiffusion layer, and the canister can be simplified and the reduction of the number of parts and the cost thereof can be realized.

Activated charcoal canister

To enable bonding flat and corrugated sheets at their contact points by laser welding or other welding methods while laminating and spirally winding the sheets, a process of producing a metal catalyst carrier for exhaust gas purification in the form of a metal honeycomb column composed of flat and corrugated metal sheets alternately laminated, wound together, and bonded to each other, the process includes the steps of: forming plural openings in a flat sheet of a metal; laminating one piece of the flat sheet having the openings formed therein and one piece of a corrugated sheet of a metal and bonding the laminated flat and corrugated sheets to each other to form a composite sheet; and spirally winding the composite sheet around an axis to form columnar turns each composed of an outer flat layer composed of the flat sheet and an inner corrugated layer composed of the corrugated sheet, while bonding an outer turn and an adjoining inner turn by welding an inner corrugated layer of the outer turn, in a portion exposed in one of the openings of an outer flat layer of the outer turn, to an outer flat layer of the adjoining inner turn through said one of the openings to bond the outer turn and the adjoining inner turn.

Process of producing metal catalyst carrier

By using a small heat accumulator installed in a cooling water system, malfunction of exhaust emission during warming up is prevented. Such a cooling system includes a cooling water passage for returning cooling water flowing from a cooling water outlet of an automotive engine to a cooling water inlet through a radiator, a first bypass passage for returning the cooling water just after flowing from the cooling water outlet to the cooling water inlet through the radiator, a second bypass passage for returning the cooling water just after flowing out from the cooling water outlet of the engine to the cooling water inlet through the radiator by supplying the cooling water near a heat-sensing portion of a thermostat, a flowing amount adjusting valve for enlarging a cooling water flowing ratio to the first bypass passage with respect to the second bypass passage corresponding to a reduction of a load of the engine and the heat accumulator installed through the first bypass passage.

Cooling system for an internal combustion engine

An evaporative emission control system which may be used in automotive vehicles is disclosed. The evaporative emission control system includes a canister, an inlet passage, a fuel vapor passage, an outlet valve, and an inlet valve. The air inlet passage is exposed at an end to the atmosphere and connected at the other end to the canister for drawing fresh air into the canister. The fuel vapor passage communicates between the canister and a fuel tank. When a pressure in the fuel tank is increased above a given level so that a difference in internal pressure between the fuel tank and the canister reaches a first value, the outlet valve establishes communication between the fuel tank and the canister to allow fuel vapor evaporated within the fuel tank to be drawn into the canister through the fuel vapor passage. Alternatively, when the pressure in the fuel tank is decreased below a given level so that a difference in internal pressure between the fuel tank and the canister reaches a second value, the inlet valve establishes communication between the fuel tank and the canister to allow the air to be drawn into the canister through the air inlet passage. The second value is so determined as to prevent the amount of fuel vapor generated within the fuel tank from being increased above a given value.

Evaporative emission control system for automotive vehicle

An engine rotating speed sensor detects intake sound information due to the drive of an engine. A controller generates a signal having a frequency corresponding to a desired ratio of orders based on the detected intake sound information. Further, a phase and an amplitude the signal are controlled, and so a speaker arranged in a propagation path of the intake sound of the engine generates control sound to control the intake sound due to the drive of the engine. An engine noise control apparatus which is capable of effectively reducing or waveform-reshaping a wide range of engine noise. The apparatus has an engine rotating speed sensor for detecting an engine rotating speed and a waveform generator circuit for converting a rotation pulse signal to a periodic signal having a frequency which is a predetermined multiple of the detected engine rotating speed. The output of an air flow meter is passed through a bandpass filter and a reshaping circuit to generate a control signal which is an average value of alternating current components of the output. A CPU, with reference to a map previously stored in a memory, modifies the phase and amplitude of the periodic signal with respect to an engine rotation reference signal based on the rotation pulse signal and the control signal, and outputs the modified signal as driving signals to operate speakers disposed in an intake tube and an exhaust tube for reducing noise.

Engine noise control apparatus

Growing community of inventors

Nishio, Japan

Tokio Kohama