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1. 发明专利

JPH0491318A INTAKE AIR CONTROL DEVICE IN INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0491318A
公开(公告)日：1992-03-24
申请号：JP20731090
申请日：1990-08-04
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： MIYAKE MITSUHIRO , KIMOTO YASUHIRO
IPC分类号： F02D41/22 , F02B27/02 , F02D9/02
摘要： PURPOSE:To restrict generation of output reducing or the like of an internal combustion engine to the minimum by moving the opening position of a valve to the full opening or full closing position, when an abnormal condition is detected on a detecting part for detecting the opening position of the valve, or on a driving part for driving the valve. CONSTITUTION:In an intake air passage of an engine 1, a valve 5 which is driven to be open/close is provided so as to control the length of the passage long or short. In this case, the target opening value of a valve 5 corresponding to the operating condition of the engine 1, which is detected by an intake air quantity sensor 2 and a crank angle sensor 4, is memorized beforehand in a controller 8. On the other hand, a real valve opening value is found out on the basis of a valve opening detection signal from a valve opening detection circuit 7 composed of a Hall sensor or the like, and thereby comparison with the valve opening and the target opening is carried out. As a result, a driving circuit 6 composed of a DC motor or the like is driven when the actual valve opening is different from the target opening. When it is judged that the valve driving circuit 6 or the valve opening detecting circuit 7 is in an abnormal condition, the opening position of a valve 5 is controlled to the full closing or full opening position.

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

JPH02211349A AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02211349A
公开(公告)日：1990-08-22
申请号：JP3148989
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 increase the exhaust gas purification efficiency due to a catalyst by deflecting the air-fuel ratio of the combustion gas introduced into the catalyst in vibration form in the vicinity of the theoretical air-fuel ratio and allowing the output of an exhaust gas component detecting means to include the result information in the catalytic purifying action. CONSTITUTION:The first signal whose increase/decrease direction changes on the basis of the variation of the output which sharply varies in the vicinity of the theoretical air-fuel ratio of an O2 sensor 17 which is installed inside or on the downstream side of a catalyst is outputted by a generating means 45. Further, the second signal which vibrates with the cycle shorter than the cycle of the output variation cycle of the O2 sensor 17 on the basis of the engine operation state is outputted by a generating means 46, and the third signal is generated by superposing both signals by a generating means 47, and the air-fuel ratio of the combustion gas which is introduced into the catalyst on the basis of this signal is controlled so as to vibrate in the vicinity of the theoretical air-fuel ratio. Thus, the output of the O2 sensor 17 becomes the output which is obtained by receiving the result information of the catalytic purifying action, and the limit cycle in the air-fuel ratio feedback control becomes large apparently. Thus, the exhaust gas purification efficiency can be increased to the max.

6. 发明专利

JPH0219627A AIR-FUEL RATIO CONTROL DEVICE 失效
公开(公告)号：JPH0219627A
公开(公告)日：1990-01-23
申请号：JP16903688
申请日：1988-07-08
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： HASHIMOTO TORU , MIYAKE MITSUHIRO , KAMURA HITOSHI , MAKIKAWA YASUYUKI , NISHIDA MINORU , KATASHIBA HIDEAKI
IPC分类号： F02D41/06 , F01N3/20 , F02D41/36
摘要： PURPOSE:To make it possible to quickly activate a catalyst by stopping fuel injection to specific cylinders or reducing injection quantity. CONSTITUTION:When a fixed time has elapsed after starting an engine 1 and the starting of the engine is completed, the temperature of coolant is in a range of setting values, load is below a preset value, and engine speed is below the speed setting, injectors 6-1, 6-2, 6-4, 6-5 are operated at a specified timing to inject fuel, and fuel injecting operation of injectors 6-3, 6-6 are stopped on a command of a control device 7. Thus, a mixture of high gasoline concentration is, as usual, sucked into first, second, fourth, fifth cylinders, in which burning, explosion take place, but no burning, explosion take place in third and sixth cylinders. The concentration of oxygen in exhaust gas periodically becomes excessively thick or thin. As a result, highly concentrated oxygen is periodically supplied to a three component catalytic converter 11 to accelerate its oxidation, and thereby the temperature of catalyst is rapidly raised.

7. 发明专利

JPH01237335A AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH01237335A
公开(公告)日：1989-09-21
申请号：JP6276788
申请日：1988-03-16
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 improve convergence of an air-fuel ratio control with high reliability by providing a means for correcting an air-fuel ratio correcting coefficient in response to minimum and maximum values of the amplitudes in the air-fuel ratio correcting coefficient. CONSTITUTION:An ECU 23 in an air-fuel ratio control device is provided with a decision means 35 for deciding a reference driving time for a fuel injecting solenoid valve 8 based on outputs from an air flow sensor 11 and an crank angle sensor 21. There are provided a set means 36 for setting an air-fuel ratio coefficient with use of a map based on an engine speed and an engine load, and a correcting means 37 for setting an air-fuel ratio correcting coefficient (feedback factor) in response to outputs of an O2 sensor 17, which are alternatively selected by switching means 38, 39. In this case, in the ECU 23, there is provided a feedback factor correcting means 45 for correcting an air-fuel ratio correcting coefficient in response to the variations in minimum and maximum values of the amplitudes in the air-fuel ratio correcting coefficient.

8. 发明专利

JPH05187281A DRIVING FORCE CONTROL DEVICE FOR VEHICLE 失效
公开(公告)号：JPH05187281A
公开(公告)日：1993-07-27
申请号：JP357392
申请日：1992-01-13
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： HASHIMOTO TORU , MIYAKE MITSUHIRO , TAKAHASHI TOSHIHISA
IPC分类号： B60K28/16 , B60K31/00 , F02D29/02
摘要： PURPOSE:To provide a vehicle driving force control device having the capability of preventing the occurrence of wheel slip, even upon the failure of a part of the device, and ensuring stable drive at all times. CONSTITUTION:There is provided a CPU 31A to calculate the target opening of a throttle valve against abnormality, upon occurrence thereof, on the basis of output from a throttle valve opening sensor 18 and output from an accelerator pedal opening sensor 16. In addition, a throttle valve 17 is so controlled that a deviation between the target throttle valve opening against abnormality and the accelerator pedal opening decreases at the predetermined speed, when any abnormality occurs.

9. 发明专利

JPH04131762A CATALYST DETERIORATION DIAGNOSTIC DEVICE 失效
公开(公告)号：JPH04131762A
公开(公告)日：1992-05-06
申请号：JP25312790
申请日：1990-09-21
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 , B01D53/86 , F01N11/00 , G01N27/26 , G01N31/10
摘要： PURPOSE:To judge deterioration accurately at any desired time by making deterioration judgement of a catalyst on the basis of anticipated air-fuel ratio and the air-fuel ratio downstream the sensor given by a downstream air-fuel ratio sensor, or on the basis of the anticipated exhaust gas temp. and the exhaust gas temp. downstream the sensor given by a downstream temp. sensor. CONSTITUTION:Output waves from air-fuel ratio sensors 5, 7 are trimmed and amplified by respective signal processing means 9, 10, while the outputs of temp. sensors 6, 8 are digitalized by respective A/D converters 11, 12, and these output signals are entered into a controller 13. The controller 13 calculates the theoretical exhaust gas concentration and theoretical exhaust gas temp. after passage of catalyst 4, calculates also at least one of the anticipated air-fuel ratios or anticipated exhaust gas temps. in accordance with these values obtained, judges deterioration of catalyst on the basis of the anticipated air-fuel ratio or anticipated exhaust gas temp. and the downstream-the-sensor air-fuel ratio or downstream-the-sensor exhaust gas temp., and then drives a warning lamp 14 on the basis of catalyst deterioration judging information. Thereby warning about catalyst deterioration can be made accurately at any desired time.

10. 发明专利

JPH0491319A INTAKE AIR CONTROL DEVICE IN INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0491319A
公开(公告)日：1992-03-24
申请号：JP20731190
申请日：1990-08-04
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： MIYAKE MITSUHIRO , KIMOTO YASUHIRO
IPC分类号： F02D41/22 , F02B27/02 , F02D45/00
摘要： PURPOSE:To eliminate generation of output reduction or the like of an internal combustion engine caused by disagreement between target and actual valve opening values, by not judging trouble in a detecting part for detecting the position of the valve, or a driving part for driving the valve, when the opening position of the valve is at an initial opening position. CONSTITUTION:In an intake air passage of an engine 1, a valve 5 which is driven to be open/close is provided so as to control the length of the passage long/short. In this case, the target opening of a valve 5 corresponding to the operating condition of the engine 1, which is detected by an intake air quantity sensor 2 and a crank angle sensor 4, is removed beforehand in a controller 8. On the other hand, a real valve opening is found out on the basis of a valve opening detecting signal from a valve detecting circuit 7, and then comparison with the vale opening and the target opening is carried out. As a result, a valve driving circuit 6 is driven when the actual valve opening is differnt from the target opening. Only when the valve 5 is at a position to which it is removed from an initial position (a full closing position), trouble in the valve driving circuit 6 or the valve opening detecting circuit 7 is judged.

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