专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH0491343A AIR-FUEL RATIO CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0491343A
公开(公告)日：1992-03-24
申请号：JP20731290
申请日：1990-08-04
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： HASHIMOTO TORU , TAKAHASHI TOSHIHISA
IPC分类号： F02D41/14
摘要： PURPOSE:To improve purifying efficiency by a catalyst by controlling a fuel injection amount to be adjusted based on a predetermined frequency and amplitude with a feedback study correction amount, stored at normal operation time, serving as the center when an air-fuel ratio measuring means is in trouble. CONSTITUTION:In a control circuit 16 during operation of an engine, output signals of various sensors are input to calculate collectively a correction coefficient of water temperature, intake air temperature, air-fuel ratio sensor, etc., and a basic fuel injection amount of the base from an intake air amount per 1 cylinder in an interruption program, and this amount is corrected by a correction coefficient, calculated by a main program, to calculate the actual injection amount and to drive-control an injector 4. Here, a value of the feedback correction coefficient is set to a value such that it is alternately changed with a predetermined value serving as the center in predetermined period and amplitude by an air-fuel ratio sensor output timer, when an air-fuel ratio sensor 8 is decided in trouble. In this way, air-fuel ratio is vibrated in predetermined amplitude in the vicinity of the theoretical air-fuel ratio to improve purifying efficiency of a catalyst.

2. 发明专利

JPS6453042A AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS6453042A
公开(公告)日：1989-03-01
申请号：JP20969887
申请日：1987-08-24
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： MIYAKE MITSUHIRO , HORIE OSAMU , TAKAHASHI AKIRA , HASHIMOTO TORU , MAKIKAWA YASUYUKI , NISHIDA MINORU , KATASHIBA HIDEAKI
IPC分类号： F02D41/14 , F02D41/00
摘要： PURPOSE:To display an oxygen storage effect as well as to maintain a degree of emission control efficiency to the maximum by compensating a period, amplitude and a mean air-fuel ratio at the time of forcibly vibrating an air-fuel ratio on the basis of output of an oxygen sensor installed in the inner part or at the downstream of a catalytic converter. CONSTITUTION:A detected value of a linear type oxygen sensor 18 in stalled at the downstream of a catalytic converter is inputted into an electronic control unit ECU together with those out of an air flow sensor 11, a crank angle sensor, a throttle sensor 14, etc. The electronic control unit ECU sets a mean air-fuel ratio amplitude and a period at the time of forcibly vibrating an air-fuel ratio so as to cause output median, amplitude and frequency of the linear type oxygen sensor 18 to become the specified range, and it forcibly varies a control signal to a fuel injection valve 8.

3. 发明专利

JPS6453038A AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS6453038A
公开(公告)日：1989-03-01
申请号：JP20450087
申请日：1987-08-18
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： MIYAKE MITSUHIRO , HORIE OSAMU , TAKAHASHI AKIRA , HASHIMOTO TORU , MAKIKAWA YASUYUKI , NISHIDA MINORU , KATASHIBA HIDEAKI
IPC分类号： F02D41/14 , F02D41/00
摘要： PURPOSE:To maximize the emission control efficiency of a catalyzer by adding compensation to air-fuel ratio control by an oxygen sensor at the upstream of the catalyzer on the basis of output of a linear type oxygen sensor in the catalyzer inside or at the downstream. CONSTITUTION:Each detected value of an upstream oxygen sensor 17 installed at the upstream side of a catalytic converter 9 and a linear type oxygen sensor 18 installed at the downstream side is inputted into an electronic control unit ECU together with those of an air-flow sensor 11, an intake air temperature sensor 12, an atmospheric pressure sensor 13, a throttle sensor 4, an idle switch 15, etc. This electronic control unit ECU operates an air-fuel ratio compensation factor on the basis of the detected value of the upstream oxygen sensor 17, while it judges a catalyzer state on the basis of a deviation from gradient in the detected value of the linear type oxygen sensor 18 at the downstream and reference value. According to this judged result, it compensates both rich and lean gains at the time of operation of the air-fuel ratio compensation factor based on the detected value of the upstream oxygen sensor 17.

4. 发明专利

JPS6445913A CATALYST DETERIORATION DIAGNOSING DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS6445913A
公开(公告)日：1989-02-20
申请号：JP20023287
申请日：1987-08-11
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： HORIE OSAMU , TAKAHASHI AKIRA , HASHIMOTO TORU , MIYAKE MITSUHIRO , KATASHIBA HIDEAKI , MAKIKAWA YASUYUKI , NISHIDA MINORU
IPC分类号： F01N3/20 , F01N11/00
摘要： PURPOSE:To suppress an amount of a noxious exhaust gas component, diffused in the open air, to a minimum value, by a method wherein a plurality of linear air-fuel ratio sensors are disposed before and after a catalyst converter connected to the exhaust pipe of an engine, and monitors an exhaust gas state to discriminate deterioration of a catalyst. CONSTITUTION:A catalyst converter 2 connected to an exhaust pipe 1 of an engine E, and linear air-fuel ratio sensors 3 and 4 are disposed on the upper stream side and the down stream side, respectively, of a catalyst converter 2. After detecting signals from the linear air-fuel ratio sensors 3 and 4 are shaped and amplified by signal processing means 5 and 6, respectively, the detecting signals are compared with each other by means of a trouble diagnosing means 7 to diagnose a trouble on the catalyst converter 2, and the trouble is converted into sound and light by means of a trouble alarming means 8 to alarm it to an operator. This constitution enables rapid detection of deterioration of performance of the catalyst converter 2, and suppression of an amount of a noxious gas component, diffused in the open air, to a minimum value.

5. 发明专利

JPH0763056A RADIATOR FAN CONTROLLER 失效
公开(公告)号：JPH0763056A
公开(公告)日：1995-03-07
申请号：JP21121993
申请日：1993-08-26
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： HASHIMOTO TORU , KURATANI SHINICHI , KADOTA YOICHI
IPC分类号： F01P7/04
摘要： PURPOSE:To secure a radiator fan that is excellent in accuracy and able to do delicate control according to an engine state. CONSTITUTION:A control means on a radiator fan 7 is installed in an electronic control unit 11 controlling an engine 2, and this radiator fan 7 is controlled by means of a fuzzy inference on the basis of each information out of both cooling water temperature and engine speed sensors 4 and 5 being available for engine control by the electronic control unit 11.

6. 发明专利

JPH04181149A DIAGNOSIS FOR DETERIORATION OF CATALYST 失效
公开(公告)号：JPH04181149A
公开(公告)日：1992-06-29
申请号：JP30997490
申请日：1990-11-15
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： MIYAKE MITSUHIRO , HASHIMOTO TORU , TAKAHASHI AKIRA , HORIE OSAMU , KATASHIBA HIDEAKI , MAKIKAWA YASUYUKI , NISHIDA MINORU
IPC分类号： G01N33/00 , F01N3/20 , F01N11/00 , F02D41/14 , G01N27/00 , G01N27/26 , G01N27/409
摘要： PURPOSE:To improve accuracy in determining deterioration of a catalyst by taking respective air-to-fuel ratios on an upstream and downstream the catalyst, obtaining a value indicating a correlation per frequency component and determining deterioration of the catalyst. CONSTITUTION:A tertiary catalyst 2 is provided on an exhaust gas path 1, while exhausted gas G whose air-to-fuel ratio is periodically varied is made flow from an upstream of the catalyst 2. Under the conditions, respective air-to- fuel ratios V1, V2 are detected for predetermined sampling time from upper and lower linear air-to-fuel ratio sensors 3, 4 provided on an upstream and downstream the catalyst 2. The output V1, V2 waveforms are converted into a value indicating correlation per frequency component (coherence) in a mutual correlation value calculating process. Here the output V1, V2 waveforms are taken into an FFT module 5, where a pair of random input functions are Fourier-transformed and a coherence function is calculated. The obtained coherence function is subjected to determination of deterioration in a deterioration determining process, and according to an obtained deterioration signal a warning means such as a buzzer and an alarm lamp is driven so that deterioration of the catalyst is informed.

7. 发明专利

JPH03111647A EXHAUST GAS PURIFIER 失效
公开(公告)号：JPH03111647A
公开(公告)日：1991-05-13
申请号：JP24884989
申请日：1989-09-25
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： TAKAHASHI AKIRA , CHINO MASASHI , HASHIMOTO TORU , MIYAKE MITSUHIRO , NISHIDA MINORU , KATASHIBA HIDEAKI
IPC分类号： F02D41/14 , F02D45/00
摘要： PURPOSE:To improve purifying efficiency by comparing an air-fuel ratio sensor output with a basic signal through a waveform processing means whose time limit is controlled, generating an oscillation signal centered on integration value of an air-fuel ratio discriminating signal to add it to the air-fuel ratio discriminating signal for feedback control. CONSTITUTION:Basic injecting time is determined from an intake air amount Qa and engine speed Ne by a CPU 7 used in ECU 70 so as to add compensation of water temperature Tw, intake air temperature TA and acceleration increase. Besides, the output of an air-fuel ratio sensor 12 is compared with a reference signal 21 by a comparator 20 through a waveform processing circuit 26 whose time limit is controlled so as to integrate a rich/lean discrimination signal by means of an integrator 22, and the oscillation signals of amplitude and frequency corresponding to an engine running condition are generated by means of a generating circuit 24 with the output level centered. The discriminating signal is added to a signal proportionally amplified in a circuit 23 according to a driving condition for adding feedback compensation of air-fuel ratio. It is thus possible to make sufficient use of exhaust gas purifying ability of a catalytic converter.

8. 发明专利

JPH03111646A EXHAUST GAS PURIFIER 失效
公开(公告)号：JPH03111646A
公开(公告)日：1991-05-13
申请号：JP24884889
申请日：1989-09-25
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： TAKAHASHI AKIRA , CHINO MASASHI , HASHIMOTO TORU , MIYAKE MITSUHIRO , NISHIDA MINORU , KATASHIBA HIDEAKI
IPC分类号： F02D41/14
摘要： PURPOSE:To maintain high exhaust gas purifying efficiency by generating after changing an oscillation signal which centers on integration value of an air-fuel discrimination signal by amplitude and frequency corresponding to a driving condition, and adding said signal to an air-fuel ratio signal for feedback-control. CONSTITUTION:Basic injecting timing is determined from an intake air amount Q, and engine speed Ne by a CPU 70 used in a controller 7 so as to add compensation of cooling water temperature Tw, intake air temperature TA and acceleration. Besides, the output from an air-fuel ratio sensor 12 is compared with a reference signal 21 in a comparing circuit 20, so as to discriminate rich/lean to be integrated by an integrator 22, and an oscillation signal of amplitude or frequency matching to an engine running condition is generated through an oscillation signal generating circuit 24 with the output level centered so as to add said signal to output from a proportional amplifying circuit 23 which proportionally processes a discriminating signal from the comparator 20 according to a driving condition. Based on this, feedback compensation for the air-fuel ratio is added. It is thus possible to sufficiently utilize exhaust gas purifying ability of a catalytic converter and maintain high exhaust gas purifying efficiency in a range of air fuel ratio wider than usual.

9. 发明专利

JPH02211350A AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02211350A
公开(公告)日：1990-08-22
申请号：JP3149089
申请日：1989-02-09
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： MIYAKE MITSUHIRO , HASHIMOTO TORU , CHINO MASASHI , TAKAHASHI AKIRA , KATASHIBA HIDEAKI , NISHIDA MINORU , MAKIKAWA YASUYUKI
IPC分类号： F02D41/14
摘要： PURPOSE:To reduce the engine vibration by compulsorily deflecting the air-fuel ratio of the exhaust gas supplied into a catalyst in the vicinity of the theoretical air-fuel ratio and suspending or reducing the compulsory vibration in the low speed and low load operation. CONSTITUTION:The air-fuel ratio correction coefficient is outputted from a map 50 on the basis of the signals of a revolution speed sensor 21 and an air flow sensor 11, and the output of an air-fuel ratio control means 51 which compulsorily deflects the air-fuel ratio of the exhaust gas supplied into a catalyst, in the vicinity of the theoretical air-fuel ratio is added by an adding means 53, and the air-fuel ratio of the combustion gas supplied into the catalyst is controlled. In the low speed and low load operation of an internal combustion engine which is detected by the sensors 21 and 11, a vibration control means 52 suspends or reduces compulsory vibration. Thus, in the ordinary operation, the exhaust gas purification efficiency by the catalyst can be increased, and in the low speed low load operation, the engine vibration can be reduced.

10. 发明专利

JPS6453041A AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS6453041A
公开(公告)日：1989-03-01
申请号：JP20450387
申请日：1987-08-18
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： MIYAKE MITSUHIRO , HORIE OSAMU , TAKAHASHI AKIRA , HASHIMOTO TORU , MAKIKAWA YASUYUKI , NISHIDA MINORU , KATASHIBA HIDEAKI
IPC分类号： F02D41/14 , F02D41/00
摘要： PURPOSE:To compensate a secular change in an oxygen sensor by judging a driving range where output of the oxygen sensor becomes a maximum value and another driving range where it becomes a minimum value, and compensating a reference value in air-fuel ratio feedback control on the basis of the these maximum and minimum values found at both driving ranges. CONSTITUTION:Each detected value of an air flow sensor 11, a crank angle sensor, a throttle sensor 14, an idle switch 15, an oxygen sensor 17, etc., is inputted into an electronic control unit ECU which controls valve opening time of a fuel injection valve 8. When this electronic control unit ECU judges these facts that a fuel-cut area is continued for more than half a second and an area where engine load exceeds the specified value is continued for more than half a second as well, it regards the detected value of the oxygen sensor 17 as becoming the maximum value or the minimum value each, taking in the detected value of the oxygen sensor 17 at both area. On the basis of these two detected values, a reference value in air-fuel ratio feedback control is compensated.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式