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公开(公告)号：JPH08200137A
公开(公告)日：1996-08-06
申请号：JP978295
申请日：1995-01-25
Applicant: TOYOTA MOTOR CORP
Inventor： MASUSHIRO ZENICHIROU , MATSUSHITA SOICHI
Abstract: PURPOSE: To enable combustible mixture to be formed near a spark plug in the ignition timing by making the suitable dispersion time of spray injected during the compression stroke in an injection controller for a cylinder injection- type internal combustion engine. CONSTITUTION: An injection controller is constituted of an injection amount calculating means provided with a fuel injection valve for directly injecting fuel into a cylinder of an engine, and for calculating the fuel injection amount to be injected from the fuel injection valve during the compression stroke, an injection completion timing calculating means for calculating the injection completion timing AINJ2 on the basis of the basic fuel injection amount required for one combustion cycle of the engine, and a fuel control means for controlling the fuel injection amount in the compression stroke so that fuel may be injected from the fuel injection valve only for the fuel injection time τ2 by taking the injection completion timing as the reference. The dispersing time of spray after injection is made appropriate by controlling fuel injection by taking the injection completion timing of the fuel as the reference, and combustible mixture suitable for ignition is formed near a spark plug in the ignition timing.
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公开(公告)号：JPH07102948A
公开(公告)日：1995-04-18
申请号：JP24825993
申请日：1993-10-04
Applicant: TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
Inventor： MATSUSHITA SOICHI , KOBAYASHI TATSUO , MATSUURA KOZO , FUJIMOTO MASAO , TAKI MASAHIRO , YOKOTA KOJI
Abstract: PURPOSE:To prevent the occurrence of variation in the engine output torque unexpected by a driver by executing the regenerative operation of a NOx absorbent. CONSTITUTION:A NOx absorbent unit 5 and a NOx selective reducing catalyst unit 6 are arranged from upstream in the exhaust passage 3 of an internal combustion engine 1 in which lean air-fuel ratio operation is carried out. An engine control unit (ECU) 20 calculates the amount of NOx absorption inside the NOx absorbent unit 5 on the basis of the engine load conditions, and when the amount of NOx absorption exceeds a prescribed value, a reducing agent is supplied to the NOx selective reducing catalyst unit 6 through a reducing- agent supply device 11. Even if the amount of NOx absorption of the NOx absorbent increases and the absorbing chpacity is reduced, the NOx in the exhausst flowing downstream is reduced and purified by the NOx selective reducing catalyst unit, so that the need for regenerating the NOx absorbent by changing over the engine air-fuel ratio to rich at intervals of a prescribed time can be dispensed with, and the occurrence of an unexpected torque shock can be prevented.
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公开(公告)号：JPH06167215A
公开(公告)日：1994-06-14
申请号：JP32178792
申请日：1992-12-01
Applicant: TOYOTA MOTOR CORP
Inventor： MATSUURA KOZO , MATSUSHITA SOICHI , GONO TAKESHI
Abstract: PURPOSE:To keep NOx emission amount to the atmosphere within the target value and to. CONSTITUTION:A catalyst warming up device is provided with an upstream side lean NOx catalyst 5, which reduces NOx by utilizing HC and is provided in an engine exhaust passage 3, a downstream side catalyst 4, which at least has oxidation action and is provided in the engine exhaust passage 3, and a combustible material supply combustion means 6, 8, 9, which supply a combustible material between both of the catalysts in the engine exhaust passage 3 at least on an engine cool start so as to burn the combustible material by utilizing unburned oxygen in the engine combustion chamber.
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公开(公告)号：JPH05118244A
公开(公告)日：1993-05-14
申请号：JP27984491
申请日：1991-10-25
Applicant: TOYOTA MOTOR CORP
Inventor： MATSUSHITA SOICHI
IPC: F02B23/10 , F02B75/12 , F02D1/02 , F02D41/02 , F02D41/14 , F02D41/20 , F02D41/30 , F02D41/34 , F02D41/38 , F02D41/40 , F02D45/00
Abstract: PURPOSE:To realize good combustion in the inlet stroke and in the compression stroke by changing the ratio of the fuel supply quantity to the fuel injection quantity so that the torque variation is below a preset torque variation. CONSTITUTION:In the inlet stroke fuel is supplied to form a predicted mixture in the cylinder of an engine, and in the compression stroke fuel is injected into the cylinder of the engine to form an igniting mixture near a spark plug. Especially, a torque variation detecting means 200 for detecting the torque variation is provided. The ratio of the fuel supply quantity in the inlet stroke to the fuel injection quantity in the compression stroke is changed by a fuel quantity ratio changing means 202 so that the torque variation detected by the torque variation detecting means 200 is below a preset torque variation. Thus, good combustion with small torque variation can be constantly obtained in the operating range.
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公开(公告)号：JPH04358736A
公开(公告)日：1992-12-11
申请号：JP40609290
申请日：1990-12-25
Applicant: TOYOTA MOTOR CORP
Inventor： HIYOUDOU YOSHIHIKO , MATSUSHITA SOICHI
Abstract: PURPOSE:To prevent wrong learning of an increase quantity correction value of a fuel injection quantity and wrong control of an air-fuel ratio at the time of acceleration by correcting a target torque or an output torque in response to a delay quantity of an ignition timing, and providing the target torque or the output torque including an predicted variation quantity of the torque by the delay angle. CONSTITUTION:The real output torque of an engine is calculated by an output torque calculation means M2. The target torque of the engine is calculated from a detected result of an operation condition detection means M1 by a target torque calculation means M3. The target torque or the output torque is corrected in response to the delay of an ignition timing control means M4, by a torque correction means M5. The first or last correction values which decrease acording to the first and last decrease coefficients renewed based on the ratios of the first and last output torque and target torque at the time of the acceleration are by the first correction value calculating means M7 and the last correction means M8. A basic fuel injection quantity is increasingly correted by the first and last correction values at the time of the acceleration by a fuel injection quantity correction mean M9.
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Patent Agency Ranking
公开(公告)号：JPH03242415A
公开(公告)日：1991-10-29
申请号：JP3827190
申请日：1990-02-21
Applicant: TOYOTA MOTOR CORP
Inventor： NAKAJO YOSHIKI , INOUE TOKUTA , NAKANISHI KIYOSHI , MATSUSHITA SOICHI
Abstract: PURPOSE:To utilize vaporizing fuel from a fuel tank so as to maintain a purifying factor of NOx always at a high value by introducing the vaporizing fuel into an exhaust pipe in the upstream of a lean NOx catalyst when an HC insufficient operation condition is judged. CONSTITUTION:A lean NOx catalyst 6, which is composed of zeolite carried with transition metals or noble metals to deoxidize NOx under presence of HC in the oxidizing atmosphere, is provided in an exhaust system 4 of an internal combustion engine 2. Vaporizing fuel pipes 12, 14, for guiding vaporizing fuel from a fuel tank 8 to a vaporizing fuel absorbing canister 10 and an upstream exhaust pipe 4a of the lean NOx catalyst 6, are provided. Here in an ECU30, a selector valve 16 is selected to a side of the vaporizing fuel pipe 12, when an operation condition of the internal combustion engine 2 detected by an operation condition detecting means is judged in an HC insufficient operation condition, and to a side of the vaporizing fuel pipe 14 when the operation condition is judged not in the HC insufficient operation condition. In this way, a purifying factor of NOx by the lean NOx catalyst 6 can be maintained always in a high value by holding a HC concentration of exhaust gas always in a high value.
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公开(公告)号：JPH0326848A
公开(公告)日：1991-02-05
申请号：JP15973089
申请日：1989-06-23
Applicant: TOYOTA MOTOR CORP
Inventor： MATSUSHITA SOICHI
Abstract: PURPOSE:To stabilize the air-fuel ratio in acceleration, besides the air-fuel ratio after acceleration by renewing the initial value of the acceleration increased quantity so that the integration calculation value of the fuel consumption variation quantity becomes a prescribed value and calculating the acceleration increased quantity by damping the initial value of the acceleration increased quantity by a prescribed damping rate. CONSTITUTION:When an acceleration state judging means judges an acceleration state, a transient period generating means generates the period from the time point to the time point when the fuel consumption rate variation quantity SFC of an internal combustion engine which is calculated by a calculating means is stabilized as a transient period CTOL. The fuel consumption rate variation quantity SFC during the transient period is integration- calculated by an integration-calculating means, and a learning means learns the acceleration increased quantity initial value GACCi so that the integration calculation value SSFC becomes a prescribed value. Then, the acceleration increased quantity calculating means calculates the acceleration increased quantity TACC by damping the initial value GACCi of the acceleration increased quantity by a prescribed damping rate Galphai, and an air-fuel ratio adjusting means is drive-controlled. Thus, also the air-fuel ratio in acceleration is stabilized, besides the air-fuel ratio after acceleration, and the deterioration of the exhaust quality can be prevented.
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公开(公告)号：JPH02277947A
公开(公告)日：1990-11-14
申请号：JP9868589
申请日：1989-04-20
Applicant: TOYOTA MOTOR CORP
Inventor： KOTANI TAKESHI , TAKIMOTO TOSHIYUKI , HIYOUDOU YOSHIHIKO , MATSUSHITA SOICHI
Abstract: PURPOSE:To correctly detect an abnormality by detecting the torque difference between cylinders via the change of the factors corresponding to the engine rotating speed between cylinders, outputting and controlling the torque correction quantity of a specific cylinder so as to dissolve the torque difference, and detecting the cylinder as abnormal when the torque difference is judged not to be dissolved even if the correction quantity is large. CONSTITUTION:An engine rotating speed detecting means A detects the factors corresponding to the engine rotating speed during the crank angle period when torque is generated at the time of combustion in each cylinder. An inter-cylinder torque difference detecting means B calculates the torque difference between cylinders as the difference between the rotating speed factors during the crank angle period when torque is generated at the time of combustion, and an inter-cylinder torque difference correcting means C outputs the specific torque correction quantity in the direction to dissolve the torque difference. A torque control means D controls the torque based on the correction quantity, when the torque difference between cylinders is not dissolved even if the torque difference between cylinders is large, an abnormal cylinder detecting means E judges the cylinder as abnormal. An abnormality can be correctly detected for each cylinder.
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公开(公告)号：JPH02153243A
公开(公告)日：1990-06-12
申请号：JP30612488
申请日：1988-12-05
Applicant: TOYOTA MOTOR CORP
Inventor： TAKIMOTO TOSHIYUKI , MATSUSHITA SOICHI , KOTANI TAKESHI , HIYOUDOU YOSHIHIKO
IPC: F02D41/14
Abstract: PURPOSE:To prevent that the air-fuel ratio exceeds the lean limit point and prevent an accidental fire and the degradation of the combustion, etc. by controlling the air-fuel ratio to the rich side during the updating of the learning value even if the lean limit point is changed at the re-starting time after the engine stop. CONSTITUTION:A torque fluctuating quantity computing means MA for computing the torque fluctuating quantity DELTATRQ of an internal combustion engine is provided, and while a feedback execution condition judging means MB for judging that the engine satisfied the torque fluctuating quantity feedback execution condition or not is provided. When the torque fluctuating quantity feedback execution condition is satisfied, the learning value by area Kij provided in each load area of the engine is updated by a learning means MC so that the torque fluctuating quantity DELTATRQ coincidents with the predetermined value. The air-fuel ratio of the engine is adjusted by an air-fuel ratio adjusting means MD in response to the learning value by area Kij, and when the engine firstly satisfied the torque fluctuating quantity feedback execution condition, the air-fuel ratio is compensated to the rich side.
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50.发明专利
公开(公告)号：JPH01271634A
公开(公告)日：1989-10-30
申请号：JP9675088
申请日：1988-04-21
Applicant: TOYOTA MOTOR CORP
Inventor： MATSUSHITA SOICHI , TAKIMOTO TOSHIYUKI , KOTANI TAKESHI
Abstract: PURPOSE:To control a fuel injection quantity with high accuracy irrespective of the magnitude of engine speed by increasing/reducing the fuel injection quantities of the whole cylinders in accordance with the magnitude of variation in the combustion pressure of one cylinder after adjusting output torques. CONSTITUTION:The differences in output torques between each cylinder are detected from the required times for explosion strokes calculated based on the output signals of a crank angle sensor 19 and a timer, in each control circuit 41. A fuel injection quantity is corrected so as to substantially remove the output torque differences to adjust the output torque of each cylinder. Then, the fuel injection quantities of the whole cylinders are increased/reduced in accordance with the variation in a combustion pressure from a combustion- pressure sensor provided on a first cylinder. Thereby, the controlling contents of fuel injection quantity becomes simple enabling highly accurate control of the fuel injection quantity irrespective of the magnitude of engine speed.
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