Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Mitsubishi Denki K.k.

Hideaki Katashiba

Ryoji Nishiyama

Yasuhiko Hosoya

Toshiki Kuroda

Hirofumi Ohuchi

Satoshi Wachi

Hironori Matsumori

Minoru Nishida

Hitoshi Inoue

Tosiaki Yonekura

Wataru Fukui

Akira Takahashi

Kenro Mitsuda

Yoichi Kadota

Mitsuhiro Miyake

Masashi Chino

Shinji Watanabe

Masahiko Kurishige

Hiroshi Kimura

Toru Hashimoto

Kouji Hamano

Akira Demizu

Yuji Kishimoto

Tsuneo Yumikura

Kazuhiko Kawajiri

Akira Doi

Yoshiaki Akase

Hiromichi Hisato

Takashi Yonezawa

Takeshi Kitao

Masakazu Sugai

Li Liu

Hirofumi Oouchi

Kohji Hasunaka

Tomoko Masuda

Yukiko Kanazawa

Minoru Satou

Hiroaki Sigeoka

Tohru Hashimoto

A catalyst for internal combustion engine exhaust purification without frequently switching to a rich burn mode. The catalyst includes a catalyst A containing an NOabsorbing substance and an NOreducing catalyst, a catalyst B containing a hydrogen adsorption substance and a hydrogen oxidizing catalyst, an electron conductive substance C, and an ion conductive substance D. Electrons move between the catalyst A and the catalyst B through the electron conductive substance C, ions move through the ion conductive substance D, and an electrochemical reducing reaction and an electrochemical oxidizing reaction respectively occur on the catalyst A and on the catalyst B. Therefore, it is possible to quickly reduce the adsorbed NOusing the adsorbed hydrogen without depending on the atmosphere.

Catalyst and process for exhaust purification

A device for purifying exhaust gas of an internal combustion engine which provides improved purifying efficiency even in a lean operating condition without deteriorating the fuel efficiency. The device includes an electrochemical catalyst installed in the exhaust system of the internal combustion engine , the electro chemical catalyst containing an electron conducting substance and an ion conducting substance, the oxidizing reaction and the reducing reaction being promoted by the conduction of ions and electrons, thereby to electrochemically purify the exhaust gas G in the exhaust system.

Device for purifying exhaust gas of an internal combustion engine

In order to suppress the quantity of the nitrogen oxide to be released to the atmosphere when the operation state is shifted from the engine operation with lean air fuel ratio to that with stoichiometric air fuel ratio, the exhaust gas purification apparatus is arranged such that by forced rich operation, when the operation state is shifted from the engine operation with lean air fuel ratio to that with stoichiometric air fuel ratio, the operation state is shifted to the engine operation with stoichiometric air fuel ratio after performing that with rich air fuel ratio.

Exhaust gas purification apparatus and method for an internal combustion engine

A device for controlling an internal combustion engine capable of estimating the amount of NOx emission within short periods of time maintaining high precision and realizing improved control performance without increasing the cost as a result of not using map data in the ROM. The device includes NOx operation circuit for estimating the amount of NOx in the exhaust gas from a theoretical formula and an empirical formula based upon the intake air amount Qa, intake air temperature To, pressure Pb, air-fuel ratio &lgr; and EGR rate &bgr;, and control circuit for controlling at least either the NOx purifying catalyst or the combustion state in the internal combustion engine in order to lower the amount of NOx emission.

Device for controlling an internal combustion engine

An air/fuel ratio correction cylinder determining section specifies, based on the peak phase, a cylinder for which an air/fuel ratio is to be corrected. A cylinder-specific air/fuel ratio correcting section in the form of respective cylinder correcting sections through corrects an amount of fuel to be supplied to a cylinder which becomes an air/fuel ratio correction target. A cylinder for which an air/fuel ratio deviates from the remaining cylinders is specified as a fuel amount correction target based on a change in the output value of the air/fuel ratio sensor.

Air/fuel ratio control apparatus for internal combustion engine

Exhaust gas purifier for internal combustion engine

In order to improve estimation accuracy of estimating the value of the NOx exhaust concentration, the air fuel ratio control apparatus is adapted to estimate the NOx exhaust concentration from at least either one of a value depending on the air fuel ratio or a value depending on the exhaust gas recirculation quantity and a value depending to the ignition timing by means of the ECU

Air fuel ratio control apparatus for an internal combustion engine

A method for deciding the combustion state of each cylinder on the basis of an ion current signal generated between gaps of an ignition plug in an internal combustion engine, and a fuel control system which reduces a fuel injection quantity while suppressing the combustion change of each cylinder and reduces a non-combustion composition in an engine exhaust gas after starting of engine. The fuel control system for an internal combustion engine comprises: cylinder-individual fuel injection quantity correcting means,for correcting the fuel quantity injecting quantity in each cylinder so that the sum of fuel injection quantities to be supplied to the cylinders of the internal combustion engine having a plurality of cylinders decreases in each combustion cycle of each said cylinder and a difference between the combustion state value of the first cylinder of the internal combustion engine and that of the second cylinder thereof decreases; and fuel injecting means,for injecting into each cylinder the fuel injection quantity for each cylinder of said internal combustion engine corrected by said fuel injection quantity correcting means for each cylinder.

Fuel control system for internal combustion engine

A method for deciding the combustion state of each cylinder on the basis of an ion current signal generated between gaps of an ignition plug in an internal combustion engine, and a fuel control system which reduces a fuel injection quantity while suppressing the combustion change of each cylinder and reduces a non-combustion composition in an engine exhaust gas after starting of engine. The fuel control system for an internal combustion engine comprises: cylinder-individual fuel injection quantity correcting means 45, 46 for correcting the fuel quantity injecting quantity in each cylinder so that the sum of fuel injection quantities to be supplied to the cylinders of the internal combustion engine having a plurality of cylinders decreases in each combustion cycle of each said cylinder and a difference between the combustion state value of the first cylinder of the internal combustion engine and that of the second cylinder thereof decreases; and fuel injecting means 20 for injecting into each cylinder the fuel injection quantity for each cylinder of said internal combustion engine corrected by said fuel injection quantity correcting means for each cylinder.

An exhaust gas recirculation control system for internal combustion engines, comprising an exhaust gas recirculation passage for recirculating a part of an exhaust gas from an internal combustion engine into the engine; an exhaust gas recirculation control valve for controlling a flow rate of the exhaust gas flowing in the exhaust gas recirculation passage; an opening degree controller for controlling an opening degree of the exhaust gas recirculation control valve; an operating condition detector for detecting an operating condition of the engine; means for setting a target exhaust gas recirculation ratio depending on the detected operating condition; a combustion state detector for detecting a combustion state in at least one cylinder of the engine; means for finding an actual exhaust gas recirculation ratio of the engine based on the detected combustion state; and means for controlling the opening degree controller so as to bring the actual exhaust gas recirculation ratio to the target exhaust gas recirculation ratio.

Exhaust gas recirculation control system for internal combustion engines

A control apparatus for an internal combustion engine comprises: driving state detecting means for detecting a driving state of the internal combustion engine based on detected information from various sensors; control calculating means for calculating a control parameter of the internal combustion engine in accordance with the driving state; combustion state detecting means for detecting a combustion state amount of at least one of cylinders of the internal combustion engine; fuel property calculating means for calculating a property of a fuel supplied to the internal combustion engine based on the driving state and the combustion state amount; and parameter correcting means for correcting the control parameter in accordance with the fuel property. With this arrangement, it is possible to calculate the fuel property from an actual combustion state without using a sensor, and to correct the control parameter in accordance with the fuel property, thereby suppressing a deterioration of an exhaust gas, and enhancing a drivability.

Control apparatus for internal combustion engine

A combustion control system includes a waveform shaping device for producing an ON signal from an ion current detected value, a down timing detecting device for detecting down timings of the ON signal, an operating device for converting the down timings into times elapsing from a reference crank angle, mask time section setting device for setting a mask time section corresponding to a combustion period in accordance with a running condition of the internal combustion engine, a selecting device for selecting at least one of said down times detected within the mask section, and a determining device for determining a combustion parameter of said internal combustion engine in accordance with the combustion ending time, whereby the combustion state of each cylinder is detected from the combustion ending time detected by the mask time section to determine the combustion parameter so as to suppress a combustion change. In this configuration, by operating a small quantity of data, an inexpensive and accurate combustion control system for an internal combustion engine can be obtained.

Combustion control system for internal combustion engine

An automobile clutch control device comprises a target revolving speed generator 1 for generating a target revolving speed N.sub.r of an engine, a revolving speed detector 9 for detecting a revolving speed of the engine, a revolving speed error calculating unit 2 for calculating a target revolving speed error E.sub.r between the target revolving speed N.sub.r and the detected revolving speed N.sub.s, a first controller 11a for outputting a clutch drive signal U3 which corresponds to the calculated target revolving speed error E.sub.r, a revolving speed compensator 11b for outputting an engine revolving speed compensation signal U4, and an adder 11c for adding the clutch drive signal U3 and the revolving speed compensation signal U4 and outputting a target clutch drive signal U. The clutch 12 is controlled based on the output of the adder 11c.

Clutch control device

In an apparatus for controlling the introduction of air into an exhaust pipe of an internal combustion engine in which air is introduced from the intake side to the exhaust side to improve the efficiency of purifying exhaust gases, to prevent a decline in the purification efficiency of a catalyst in a state in which the exhaust gas temperature immediately after starting is low. A control valve 11 is provided in an air introducing pipe 9 for introducing air from the intake side to the exhaust side, and the control valve 11 is set in a shut-off state during starting or during starting and a predetermined time duration immediately after starting.

Controlling apparatus for introduction air into an exhaust pipe of an

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Tokyo, Japan

Hideaki Katashiba