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91. 发明专利

JP2000352308A EXHAUST EMISSION CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000352308A
公开(公告)日：2000-12-19
申请号：JP16392299
申请日：1999-06-10
申请人： TOYOTA MOTOR CORP
发明人： KATO KENJI
IPC分类号： F01N3/20 , F01N3/08 , F01N3/24 , F01N3/28 , F02D41/04
摘要： PROBLEM TO BE SOLVED: To suppress deterioration in fuel consumption by effectively discharging and reducing NOx and desorbing SOx by an occlusion reduction NOx catalyst. SOLUTION: An exhaust emission control system for an internal combustion engine is provided with an occlusion reduction NOx catalyst 17 in an exhaust pipe 16 of the engine capable of lean combustion. When the amount of the NOx absorbed in the occlusion reduction NOx catalyst 17 reaches a predetermined amount, air-fuel ratio of the engine is initially controlled to obtain the optimized air-fuel ratio of exhaust gas for NOx emission and reduction. Subsequent to the completion of the NOx emission and reduction, air-fuel ratio of the engine is controlled to obtain the optimized air-fuel ratio of exhaust gas for SOx desorption. Consequently, NOx emission and reduction and SOx desorption are carried out simultaneously and continuously.

92. 发明专利

JP2000038942A EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000038942A
公开(公告)日：2000-02-08
申请号：JP20489598
申请日：1998-07-21
申请人： TOYOTA MOTOR CORP
发明人： KATO KENJI , ITO TAKAAKI , TANAHASHI TOSHIO , TANAKA HIROSHI , SUZUKI NAOTO , KINUGASA YUKIO
IPC分类号： F01N3/08 , F01N3/24 , F01N3/28 , F01N13/02 , F01N13/04 , F02D41/02 , F02D41/04 , F02D41/14 , F02D41/34
摘要： PROBLEM TO BE SOLVED: To prevent the flowing-out of unpurified NOx from a storage/reduction catalyst by the air-fuel ration variation of exhaust gas. SOLUTION: An NOx storage/reduction catalyst 7 is provided on the exhaust gas passage 2 of an engine 1. NOx in the exhaust gas is absorbed to the NOx storage/reduction catalyst 7 during the lean air-fuel ratio operation of the engine, and at the time to discharge NOx, the engine is operated in a rich air-fuel ratio, to make the air-fuel ratio of the exhaust gas flowing in to the NOx storage/reduction catalyst 7 rich. An electronic control unit 30 carries out the secondary fuel injection not contributing to the combustion by cylinder fuel injection valves 111 to 114, in the expansion stroke or the exhaust stroke of the cylinders, while the engine is operated in the area from a theoretical air-fuel ratio to the air-fuel ratio 20, when the engine operation air-fuel ratio is changed from the lean air-fuel ratio to the rich air-fuel ratio operation, to make the air-fuel ratio of the exhaust gas flowing in to the catalyst 7 rich, so as to prevent the flowing-out of unpurified NOx from the catalyst 7, when the air-fuel ratio in the engine operation is changed.

93. 发明专利

JPH10176522A EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH10176522A
公开(公告)日：1998-06-30
申请号：JP33547696
申请日：1996-12-16
申请人： TOYOTA MOTOR CORP
发明人： KATO KENJI
IPC分类号： F01N3/08 , B01D53/86 , B01D53/94 , F02D41/02 , F02D41/14
摘要： PROBLEM TO BE SOLVED: To control discharge of NOx from the NOx absorbent with a good timing in response to a degree of lean combustion. SOLUTION: This device is provided in an exhaust system of an internal combustion engine, in which degree of lean combustion is changed in response to the operating condition, and it is provided with the NOx absorbent, which absorbs NOs when the exhaust fuel-air ratio is lean and which discharges NOx when the exhaust oxygen concentration is lowered, and an exhaust oxygen concentration lowering control means for estimating the NOx absorbed quantity, which is absorbed by the NOx absorbent, and for lowering the exhaust oxygen concentration when a judgment that the estimated NOx absorbed quantity exceeds an allowable value of the NOx absorption by the NOx absorbent is performed. In this case, on the basis of a point that NOx absorbing capacity is increased as a degree of lean combustion becomes large, namely, as an air- fuel ratio becomes large, starting time of the exhaust oxygen concentration lowering control by the exhaust oxygen concentration lowering control means is delayed as a degree of lean combustion becomes large.

94. 发明专利

JPH06259132A RECEPTION MONITORING METHOD FOR UNMANNED VEHICLE DRIVE DATA 失效
公开(公告)号：JPH06259132A
公开(公告)日：1994-09-16
申请号：JP4091893
申请日：1993-03-02
申请人： MEIDENSHA ELECTRIC MFG CO LTD , TOYOTA MOTOR CORP
发明人： HORIUCHI TAKANORI , WADA ICHIRO , OKADA YUKIHISA , KATO KENJI
IPC分类号： G05D1/00 , G05D1/02 , H04B7/26
摘要： PURPOSE:To judge the justice of the vehicle drive data by means of software without using a chattering preventing circuit of hardware even if the external vehicle sensing signal is unstable due to the chattering or a sensing mistake. CONSTITUTION:In a 1st monitoring state, an external vehicle sensing signal 7 is held in a computer and turned into an intra-CPU vehicle sensing signal 13. Then the delay of the signal 13 is monitored based on the drive data 5. Meanwhile the delay of the data 5 is monitored based on the signal 13 in a 2nd monitoring state. Under such conditions, only one of both monitoring states that is started first is available.

95. 发明专利

JPH0659727A VEHICLE CONTROL DEVICE 失效
公开(公告)号：JPH0659727A
公开(公告)日：1994-03-04
申请号：JP21440492
申请日：1992-08-11
申请人： TOYOTA MOTOR CORP
发明人： OKADA YUKIHISA , KATO KENJI
IPC分类号： G05D1/02 , G08G1/0968
摘要： PURPOSE:To provide a vehicle control device which is capable of performing the distance correction of a running vehicle in an excellent condition even if it bounds. CONSTITUTION:A road side communication machine 22 transmits a signal including prescribed location data from a loop antenna 3. An on-vehicle communication machine 14 recognizes the intensity level and location data by the reception signal from a reception antenna 20. An on-vehicle distance sensor 12 performing the measurement and calculation of a running distance is mounted on a vehicle 10. The location data is recognized when the reception signal is a prescribed value in the on-vehicle communication machine 14 and distance data is corrected by utilizing location data only when the location data is the same more than two times of three times of recognitions. Therefore, the correction of the distance data in a state that a misdetection of location generates because the vehicle 10 rebounds can be prevented from being executed.

96. 发明专利

JPH05222927A EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH05222927A
公开(公告)日：1993-08-31
申请号：JP5915292
申请日：1992-02-14
申请人： TOYOTA MOTOR CORP
发明人： KATO KENJI , HIROTA SHINYA
IPC分类号： F01N3/20 , F01N3/24 , F01N3/28 , F02D35/00
摘要： PURPOSE:To accurately and quickly control the catalyst bed temperature of a NOx catalyst within its temperature window. CONSTITUTION:An exhaust emission control device for an internal combustion engine that is equipped with a heater-fitted catalyst 7 arranged upstream of a NOx catalyst 6 is further provided with a cooling device 14. The device can control the temperature of the catalyst bed so as to be lowered, and also can accurately and quickly control the bed temperature of the NOx catalyst 6 within the temperature window in which a high purifying factor of the catalyst can be attained.

97. 发明专利

JPH057737A EXHAUST GAS PURIFIER OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH057737A
公开(公告)日：1993-01-19
申请号：JP18832591
申请日：1991-07-03
申请人： TOYOTA MOTOR CORP
发明人： KATO KENJI , MURAKI HIDEAKI
IPC分类号： B01D53/94 , F01N3/28
摘要： PURPOSE:To purify NOx by a Pt type catalyst without forming N2O. CONSTITUTION:A Rh or Pd type catalyst or a Ph/Pd mixed catalyst 10 is arranged to the front stage of the exhaust system 4 of an internal combustion engine 2 and a Pt type catalyst 8 is arranged to the rear stage of said exhaust system to constitute the, purifier of the internal combustion engine. CO is oxidized by the catalyst 10 of the front stage and the max. purifying activity temp. of NOx due to the Pt type catalyst 8 in such a case that CO is absent is higher than that in such a case that CO is present and, therefore, N2O is hard to generate.

98. 发明专利

JPH04265414A EXHAUST PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH04265414A
公开(公告)日：1992-09-21
申请号：JP4566291
申请日：1991-02-20
申请人： TOYOTA MOTOR CORP
发明人： KATO KENJI , HIROTA SHINYA
IPC分类号： F01N3/20 , F01N3/24 , F01N3/28
摘要： PURPOSE:To highly maintain the NOX purifying rate of a lean NOX catalyst in a long time by providing a catalyst to reduce NOX (lean NOX catalyst), a catalyst deterioration judging means, and a catalyst bed temperature changing means in oxidizing atmosphere and under presence of HC, in the exhaust system of an internal combustion engine capable of lean combustion. CONSTITUTION:From a reading map of an integrated running distance S, the lower and upper limit values T1, T2 of temperature range of the purifying factor peak of a lean NOX catalyst 6 are computed. As deterioration of the catalyst progresses, namely as the integrated running distance S increases, T1. T2 increase. When the catalyst is deteriorated, catalyst bed temperate is changed to the high temperature side, so as to prevent deterioration of NOX purifying factor of the lean NOX catalyst 6. Namely, even though reaction factor between HC and NOX is lowered, it is controlled to improve the NOX purifying factor by increasing a HC quantity.

99. 发明专利

JPH04243525A APPARATUS FOR PURIFYING EXHAUST GAS OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH04243525A
公开(公告)日：1992-08-31
申请号：JP2035191
申请日：1991-01-22
申请人： TOYOTA MOTOR CORP
发明人： MURAKI HIDEAKI , OISHI KIYOHIKO , KATO KENJI , TAKESHIMA SHINICHI
IPC分类号： B01D53/56 , B01D53/74 , B01D53/94 , B01J23/40 , B01J29/40 , B01J35/02 , F01N3/08 , F01N3/20 , F01N3/24 , F01N3/28 , F01N9/00 , F01N13/02 , F02M25/07
摘要： PURPOSE:To improve the thermal durability of an NOx reducing catalyst. CONSTITUTION:In the exhaust gas purifying apparatus of an internal combustion engine wherein a noble metal type catalyst 10 partially decomposing NOx in exhaust gas into N2 and O2 to partially disproportionate NOx to an intermediate product is provided to the exhaust system 6 of a dilute combustible internal combustion engine 2 and an intermediate product decomposing means 12 (or 32 or 46) decomposing the intermediate product into N2 and O2 is provided on the downstream side of said catalyst 10, the noble metal type catalyst 10 purifies NOx with high heat resistance and the intermediate product partially becoming NO2, N2O or the like is decomposed into N2 and O2 by the intermediate product decomposing means 12,32,46 without generating HC.

100. 发明专利

JPH03225013A EXHAUST PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH03225013A
公开(公告)日：1991-10-04
申请号：JP1908790
申请日：1990-01-31
申请人： TOYOTA MOTOR CORP
发明人： KATO KENJI , INOUE TOKUTA , OBATA KIYOSHI , TANAKA TOSHIAKI , TAKESHIMA SHINICHI
IPC分类号： F01N3/20 , F01N3/28
摘要： PURPOSE:To prevent the intrusion of the exhaust rich in air-fuel ratio into a lean NOx catalyst, by installing an estimating means which stimates an air- fuel ratio rich state from the output of an operation state detecting means and opens a bypass passage. CONSTITUTION:An air-fuel ratio adjusting means 12 adjusts the air-fuel ratio by the output of an operation state detecting means 10. A lean NOx catalyst 4 is installed in the exhaust system of an internal combustion engine 2, and consists of the zeolite loading the transition metals or precious metals, and reduces the NOx in the exhaust gas under the presence of HC in the oxidation environment. In this case, an estimating means 14 for estimating the air-fuel ratio rich state from the output of the operation state detecting means 10 is installed, a bypass valve 8 is controlled so that a bypass passage 6 for bypassing the catalyst 4 is opened, when the air-fuel ratio rich state is estimated. Accordingly, even if a certain time is necessary for setting the bypass valve 8 from a closed state to an opened state, the bypass valve 8 is put into opened state when the air-fuel ratio becomes rich, and the intrusion of the exhaust rich in air-fuel ratio into the catalyst 4 is prevented.

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