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21. 发明专利

JPH0331546A AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0331546A
公开(公告)日：1991-02-12
申请号：JP16634289
申请日：1989-06-27
申请人： MITSUBISHI MOTORS CORP
发明人： KUMAGAI SHIRO , AKISHINO KATSUO , KOMAGOME REIJIRO , YOSHIDA MICHIYASU , KUME TAKEO , NISHIZAWA KATSUKI , ISHIDA SEIJI , FUJITA TAKEHISA
IPC分类号： F02D41/14
摘要： PURPOSE:To prevent the deterioration of the purification efficiency of a catalytic converter by shifting the standard value of the second air-fuel ratio detecting means to the lean side of air-fuel ratio in a specific operation state, when the air-fuel ratio control is applied with correction on the basis of the result of the comparison between the detection value and the standard value of the second air-fuel ratio detecting means having the relatively low detection response speed. CONSTITUTION:The first and second air-fuel ratio detecting means 17 and 18 are installed on the upstream and downstream sides of a catalytic converter in an exhaust passage, and the air-fuel ratio correction coefficient is determined by a determining means 47 on the basis of the output of a comparison means 46 for comparing the detection value of the first air-fuel ratio detecting means 17 and the comparison standard value by a setting means 45. Further, the air-fuel ratio control by an air-fuel ratio control means 48 consisting of the means 45-47 is applied with correction by a correcting means 49 on the basis of the output of a comparison means 53 for comparing the detection value of the second air-fuel ratio detecting means 18 and the standard value by a setting means 49A. In this case, if the low speed low load operation is detected by a detecting means 50, the second setting means 49B is selected a selecting means 49C, and the second standard value which is shifted to the lean side is supplied into the comparing means 53.

22. 发明专利

JPH02259253A AIR-FUEL RATIO CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02259253A
公开(公告)日：1990-10-22
申请号：JP7859589
申请日：1989-03-31
申请人： MITSUBISHI MOTORS CORP
发明人： KUME TAKEO , YOSHIDA MICHIYASU , AKISHINO KATSUO , KUMAGAI SHIRO , KODAMA YOSHIAKI
IPC分类号： F02D41/14 , F01N3/22
摘要： PURPOSE:To improve exhaust purifying performance by introducing secondary air to a catalytic converter at the time of idle operation or the like, in case of controlling air-fuel ratio in accordance with an output of each oxygen concentration sensor provided in the up and downstream of the catalytic converter in an exhaust system. CONSTITUTION:An exhaust passage 3 arranges a catalytic converter (ternary catalyst) 9 providing in its upstream side part an upstream O2 sensor 17 detecting concentration of oxygen in exhaust gas while in the downstream side part similarly a downstream O2 sensor 18 detecting the concentration of oxygen in the exhaust gas. Each O2 sensor 17, 18 is used providing the characteristic suddenly changing output voltage in the vicinity of theoretical air-fuel ratio. While a secondary air introducing passage 20 is connected between the catalytic converter 9 and the upstream O2 sensor 17. At the time of idle operation and low load operation, secondary air is introduced from the secondary air introducing passage 20 to the catalytic converter 9 while an air-fuel ratio control is performed by an ECU so that an output value of the upstream O2 sensor 17 becomes a preset value.

23. 发明专利

JPH02211343A AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02211343A
公开(公告)日：1990-08-22
申请号：JP3149189
申请日：1989-02-09
申请人： MITSUBISHI MOTORS CORP
发明人： KUME TAKEO , YOSHIDA MICHIYASU , YUMINAKA TOSHIO , KODAMA YOSHIAKI
IPC分类号： F02D41/14
摘要： PURPOSE:To increase the purification efficiency of a catalytic converter to the max. by controlling the compulsory variation state of the air-fuel ratio by a compulsory air-fuel ratio varying means which can compulsorily varies the air-fuel ratio with the prescribed frequency and amplitude on the basis of the output supplied from an exhaust gas detecting means. CONSTITUTION:A compulsory air-fuel ratio varying means 45 and an air-fuel ratio variation control means 47, or an air-fuel ratio correction coefficient setting means 36 are selected through switching means 38 and 39, and when the setting means 36 is selected, the air-fuel ratio correction coefficient corresponding to the engine revolution speed and load is set. When the means 45 and 47 are selected, the compulsory air-fuel ratio varying means 45 sets the feedback correction coefficient and compulsorily varies the air-fuel ratio with the prescribed frequency and amplitude, and the compulsory variation state of the air-fuel ratio is controlled by the air-fuel ratio variation control means 47 on the basis of the output of an O2 sensor 17, and the coefficient for correcting the middle value of the air-fuel ratio is set, and the middle value (average value) of the air-fuel ratio is variation-corrected. Thus, air-fuel ratio can be controlled so that the purification efficiency of a catalytic converter becomes max.

24. 发明专利

JPH01116255A THROTTLE VALVE OPENING AND CLOSING CONTROL MECHANISM 失效
公开(公告)号：JPH01116255A
公开(公告)日：1989-05-09
申请号：JP27192187
申请日：1987-10-29
申请人： MITSUBISHI MOTORS CORP
发明人： YOSHIDA MASATO , SHIRAISHI KAZUHIRO , KUME TAKEO
IPC分类号： F02D9/02 , F02D9/10
摘要： PURPOSE:To enable emergency operation to be performed by closing a throttle valve by a closing mechanism and driving the throttle valve by the second actuator when an actuator, driving the throttle valve, is disabled to be controlled. CONSTITUTION:An intake pipe provides in its passage 2 a throttle valve 1 driven by a servomotor 4, and ordinarily a control unit controls the servomotor 4 so as to drive the throttle valve 1 to an optimum opening. In case of the servomotor 4 being disabled to be controlled, interrupting power to the servomotor 4 urging the throttle valve 1 in its closing direction by a return spring 5, a stopper part 3b, mounted to a turning shaft 3 of the throttle valve 1, is adapted to a linear solenoid 6, and the throttle valve 1 performs its emergency control by the linear solenoid 6.

25. 发明专利

JPS643237A DRIVE BY-WIRE TYPE THROTTLE VALVE CONTROL DEVICE WITH FAIL-SAFE MECHANISM 失效
公开(公告)号：JPS643237A
公开(公告)日：1989-01-09
申请号：JP15859087
申请日：1987-06-25
申请人： MITSUBISHI MOTORS CORP
发明人： YOSHIDA MASATO , KUME TAKEO , SHIRAISHI KAZUHIRO
IPC分类号： B60K26/04 , F02D9/02 , F02D11/10
摘要： PURPOSE:To accomplish fail-safe operation by switching a flapper to adjust the amount of intake air by a throttle valve of a normal actuator when one system of the first and second actuators fails. CONSTITUTION:During normal operation, a flapper 26 is held along a partition wall 25, so that the first and second throttle valves 3a, 3b are respectively controlled by the first and second actuators 6a, 6b according to a command from control means through the first and second intake passages, 1a, 1b. In this arrangement, when the first actuator 6a fails, the flapper 26 is pushed down to the first intake passage 1a side by angle switching means 27 to close the passage, so that air intake from the first intake passage 1a is conducted to the second intake passage 1b, and intake from both passages 1a, 1b is flow- adjusted through the second throttle valve 3b by the second actuator 6b to be sent to an internal combustion engine. Thus, fail-safe operation can be accomplished by a simple structure.

26. 发明专利

JPS63314326A WIRE DRIVEN TYPE THROTTLE VALVE CONTROLLER WITH FALL-SAFE MECHANISM 失效
公开(公告)号：JPS63314326A
公开(公告)日：1988-12-22
申请号：JP15040587
申请日：1987-06-17
申请人： MITSUBISHI MOTORS CORP
发明人： YOSHIDA MASATO , KUME TAKEO , SHIRAISHI KAZUHIRO
IPC分类号： F02D41/22 , F02D9/02 , F02D11/10 , F02D41/00
摘要： PURPOSE:To make a throttle valve controllable for its opening or closing with a simple and inexpensive structure by constituting a fail-safe mechanism, for operating the throttle valve at time of failure in a throttle valve controller, with a rope and each device absording moving force of the rope and transmitting it. CONSTITUTION:In a shaft 3a of the throttle valve 3 set up in a suction passage 1 of an engine E, there is additionally provided with a fail-safe mechanism FS. At this time, the fail-safe mechanism FS is constituted of a rope 25, whose both ends are connected each to a turning metallic material of the throttle valve 3 and an accelerator pedal 11, a device 26 absording moving force of rope 25 and a device for clamping a support arm of this device 26. At time of failure in a throttle valve controller making an actuator 6 and an engine control unit 8 the like as the main body, a fixed device is turned on by this ECU 8, whereby the fail-safe mechanism FS is automatically operated. With this constitution, the opening or closing of the throttle valve 3 is made controllable according to an operating extent of the accelerator pedal 11 via the rope 25.

27. 发明专利

JPS63198737A FUEL FEED CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE HAVING MECHANICAL SUPERCHARGER 失效
公开(公告)号：JPS63198737A
公开(公告)日：1988-08-17
申请号：JP2976587
申请日：1987-02-13
申请人： MITSUBISHI MOTORS CORP
发明人： KUME TAKEO , FUKUI TOYOAKI , OMORI SHOGO
IPC分类号： F02D41/02 , F02B33/00 , F02B39/16 , F02D23/02 , F02D41/00 , F02D41/22
摘要： PURPOSE:To prevent the occurrence of unevenness in an air-fuel ratio, by a method wherein, in a device which reads a previously stored fuel amount to control the feed of fuel according to the opening of a throttle valve and the number of revolutions of an engine during failure in operation of an air quantity sensor, a mechanical type supercharger is rendered inoperative during failure in operation of the air quantity sensor. CONSTITUTION:During running of an engine, an ECU 20 discriminates whether an airflow sensor 14 fails in operation. When discrimination is NO, an opening time of a fuel injection valve 29 is computed based on outputs from the airflow sensor 14 and a number of revolutions of engine sensor 31 to control a fuel fed amount. Meanwhile, when the discrimination is YES, an electromagnetic clutch 17 is brought into an OFF-state to bring a supercharger 16 into an inoperative state. An electromagnetic valve 26 is brought into an ON-state, a suction negative pressure is introduced to a negative pressure chamber 24a of an actuator 24 to open a bypass valve 23. Further, according to current outputs from a throttle valve opening sensor 30 and a number of revolutions of engine sensor 31, an AN value is retrieved, and based on the value, a fuel feed quantity is controlled.

28. 发明专利

JPS63198726A VENTILATION CONTROL METHOD FOR SUPERCHARGER 失效
公开(公告)号：JPS63198726A
公开(公告)日：1988-08-17
申请号：JP2976487
申请日：1987-02-13
申请人： MITSUBISHI MOTORS CORP , MITSUBISHI ELECTRIC CORP
发明人： KUME TAKEO , FUKUI TOYOAKI , OMORI SHOGO , UCHINAMI MASANOBU
IPC分类号： F02B33/36 , F02B39/00
摘要： PURPOSE:To restrain an increase in air intake volume and prevent a sharp rise or drop in engine speed by closing a ventilation passage and shutting off a clearance near the bearing of a supercharger from the atmosphere. CONSTITUTION:In controlling the ventilation of a supercharger, an electric control unit 20 first makes judgment as to whether an engine 10 is under starting operation, on the basis of detected signals from a starter switch sensor 32 and an engine speed sensor 31. And when the engine 10 is under starting operation, a ventilation valve 29 closes and a clearance between a housing 16a and a rotor 16b in a supercharger 16 is shut off from the inside (atmosphere) of an air intake pipe 12 at the upstream of a throttle valve 15. According to the aforesaid constitution, it becomes possible to prevent the inflow of air into the engine 10, bypassing the throttle valve 15 and via ventilation passages 28 and 16d and said clearance.

29. 发明专利

JPS63176737A DRIVE/CONTROL METHOD FOR AUXILIARY MACHINE 失效
公开(公告)号：JPS63176737A
公开(公告)日：1988-07-21
申请号：JP615687
申请日：1987-01-16
申请人： MITSUBISHI MOTORS CORP
发明人： KUME TAKEO , SHIRAISHI KAZUHIRO , FUKUI TOYOAKI , OMORI SHOGO
IPC分类号： B60K25/02 , F02B67/00
摘要： PURPOSE:To prevent abrupt application of load onto a belt by driving auxiliary machines such as a supercharger, an air-conditioning compressor, etc. by means of an endless belt entrained over crank pulleys through a solenoid clutch, thereby preventing simultaneous operation of a plurality of auxiliary machines. CONSTITUTION:An endless belt 10b is entrained over a crank pulley 10a of an engine 10 so as to drive auxiliary machines such as a supercharger 16, an air-conditioning compressor 18, etc. through respective pulleys 17a, 19a and solenoid clutches 17, 19. Operation of respective solenoid clutches 17, 19 causes control of specific switch and the engine rotation through a control unit 20, and when both auxiliary machines are brought from non-operating state to operating state, only one of them is operated with priority or lag so as to prevent simultaneous changing from non-operating state to operating state. Consequently, abrupt application of load onto the endless belt 10b can be prevented resulting in a lengthened service life of belt.

30. 发明专利

JPS63176626A SUPERCHARGER CLUTCH CONTROLLING METHOD 失效
公开(公告)号：JPS63176626A
公开(公告)日：1988-07-20
申请号：JP615587
申请日：1987-01-16
申请人： MITSUBISHI MOTORS CORP
发明人： KUME TAKEO , KIYOTA KATSUHIKO , OKADA TORU , FUKUI TOYOAKI , OMORI SHOGO
IPC分类号： F02B33/00
摘要： PURPOSE:To prevent any damage to a clutch plate and its abnormal wear from occurring, by stopping feed to an electromagnetic clutch at a time when voltage of a power source drops to less than the specified value, and making this clutch into nonoperation. CONSTITUTION:A throttle valve 15 is set up in the point midway in a suction pipe 12, and a supercharger 16 is set up in this suction pipe 12 lying between the throttle valve 15 and an engine 10. This supercharger is of Root's-type one being driven by the engine 10, and its connection to the engine 10 is controlled by an electromagnetic clutch 17. When a supply voltage 22 to be fed to the electromagnetic clutch is lowered to less than the specified value, magnetomotive force of the clutch goes down, whereby a slip is produced in a clutch plate. However, when the supply voltage is lowered to less than the specified value, if the electromagnetic clutch 17 is made into nonoperation, the slip of the clutch plate is avoided.

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