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1. 发明专利

JP2003293842A Failure determining device for water temperature sensor 审中-公开
标题翻译：用于水温传感器的故障确定装置
公开(公告)号：JP2003293842A
公开(公告)日：2003-10-15
申请号：JP2003127256
申请日：2003-05-02
申请人： Mitsubishi Motors Corp , 三菱自動車工業株式会社
发明人： SAKAGAMI TOMONOBU , KANAO HIDETSUGU , MIYAKE MITSUHIRO , MATSUMOTO TAKUYA
IPC分类号： F02D45/00
摘要： PROBLEM TO BE SOLVED: To provide a failure determining device for a water temperature sensor which positively determines a failure of the water temperature sensor irrespective of an operating situation.
SOLUTION: It is determined whether an internal combustion engine at warming up is in an operating state of affecting a cooling water temperature WT on the basis of a calorific value estimated from a suction air capacity detected by an air flow sensor. Clocking by a timer is started from a point of time when it is determined that the internal combustion engine is in the operating state of affecting the cooling water temperature. The clocking by the timer is carried out under a condition that it is determined that the internal combustion engine is in the operating state of affecting the cooling water temperature after starting clocking. It is judged that there is a failure when a sensor detected value does not fluctuate out of a set water temperature range throughout a predetermined time (300 sec) even though it is determined that the internal combustion engine is in the operating state of affecting the cooling water temperature. Since determination is carried out by the timer in consideration of the calorific value fluctuating in response to an operating state of the internal combustion chamber, easy and accurate failure determination is enabled.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种用于水温传感器的故障确定装置，其可以肯定地确定水温传感器的故障，而不管操作情况如何。解决方案：根据由空气流量传感器检测到的吸入空气容量估计的发热量，确定预热的内燃机是否处于影响冷却水温度WT的运行状态。从确定内燃机处于影响冷却水温度的运行状态的时刻起，通过定时器进行计时。在确定内燃机处于开始计时后影响冷却水温度的运行状态的条件下，通过定时器进行计时。即使确定内燃机处于影响冷却的运行状态，传感器检测值在规定时间（300秒）内不会在设定水温范围内波动的判定为失败水温。由于考虑到响应于内燃机的运行状态而变动的发热量，由定时器进行判定，因此能够进行容易且准确的故障判定。版权所有（C）2004，JPO

2. 发明专利

JP2004346942A Failure diagnostic system of evaporation purging system 有权
公开(公告)号：JP2004346942A
公开(公告)日：2004-12-09
申请号：JP2004209590
申请日：2004-07-16
申请人： Mitsubishi Motors Corp , 三菱自動車工業株式会社
发明人： TAKATSUKA TAKASHI , KANAO HIDETSUGU , SAKAGAMI TOMONOBU , SAITO KENJI , KUME TAKEO , FUKUDA HARUMOTO
IPC分类号： G01M15/04 , F02M25/08 , G01M15/00
摘要： PROBLEM TO BE SOLVED: To provide a failure diagnostic system of an evaporation purging system, capable of surely determining failure even in any operation state, by preventing erroneous determination of the failure by sloshing.
SOLUTION: This evaporation purging system purges absorption fuel absorbed in a canister to an intake pipe 11 of an engine 13 via a supply pipe 19, by absorbing evapotranspiration gas from a fuel tank 15 in the canister 17 via a discharge pipe 16; and has a pressure sensor 25 for detecting pressure in an evaporation passage including the fuel tank, a pressure reducing means for reducing pressure in the evaporation passage by negative pressure generated in the intake pipe, by closing a vent control valve 20 arranged in an atmospheric opening port of the canister, a reciprocating means for reciprocating in the evaporation passage, by closing a purge control valve 18 arranged in the supply pipe, after operation of the pressure reducing means, and an electronic control unit 26 as a failure determining means for permitting a failure diagnosis of the evaporation purging system, on the basis of output of the pressure sensor, even in an operation state of causing the sloshing, on condition of operating the pressure reducing means and the reciprocating means in a plurality of times, for filling up the inside of the evaporation passage with the evapotranspiration gas.
COPYRIGHT: (C)2005,JPO&NCIPI

3. 发明专利

JP2000320389A THERMOSTAT FAILURE DIAGNOSTIC DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000320389A
公开(公告)日：2000-11-21
申请号：JP13123299
申请日：1999-05-12
申请人： MITSUBISHI MOTORS CORP
发明人： HIGUCHI YOSHIAKI , KUME TAKEO , MATSUMOTO TAKUYA , KANAO HIDETSUGU , SAKAGAMI TOMONOBU
IPC分类号： F02D45/00 , F01P11/16 , F02D41/22
摘要： PROBLEM TO BE SOLVED: To provide a thermostat failure diagnostic device for internal combus tion engines that can efficiently diagnose failures in thermostats, while preventing errors in diagnosis. SOLUTION: After the start-up of an engine 1, the thermostat failure diagnostic device detects failures in a thermostat 22 from the time the cooling water temperature upstream of the thermostat 22 takes to rise by a preset degree or to a preset temperature, as long as a parameter value correlating with the intake air amount or fuel injection quantity of the engine 1 remains not less than a preset value and the cooling water temperature in general is practically equal to the intake air or outside air temperature. A thermostat failure diagnosis is thus performed, for appreciable reasonableness, not under small engine- generation heat quantity or high cooling water temperature conditions, when errors in diagnosis are liable to occur, but under relatively large engine- generating heat quantity conditions, which are immune to the errors in diagnosis.

4. 发明专利

JP2000161150A FAILURE DIAGNOSTIC DEVICE FOR EVAPORATION PURGING SYSTEM 失效
公开(公告)号：JP2000161150A
公开(公告)日：2000-06-13
申请号：JP34149698
申请日：1998-12-01
申请人： MITSUBISHI MOTORS CORP
发明人： HIGUCHI YOSHIAKI , KUME TAKEO , MATSUMOTO TAKUYA , KANAO HIDETSUGU , SAKAGAMI TOMONOBU
IPC分类号： F02M25/08 , G01M3/26 , G01M15/00 , G01M15/04
摘要： PROBLEM TO BE SOLVED: To accurately and surely determine failure without determination errors even in case causing only trace amounts of leak. SOLUTION: This failure diagnostic device detects pressure within a route from a fuel tank 1 to an intake passage 6 by means of a pressure detection means 10 as the inside of the route is kept at a predetermined internal pressure by a route internal pressure changing means and closed. The residual amount of fuel in the fuel tank 1 is detected by a fuel residual amount detection means 9 and fuel temperature in the fuel tank 1 is detected by a temperature detection means 20. The pressure detected by the pressure detection means 10 or a criterion for failure diagnosis is corrected by the correction means of an ECU 11 according to detection information transmitted from the fuel residual amount detection means 9 and the temperature detection means 20. The determination means of the ECU 11 determines the failure of an evaporation purging system by comparing the corrected detection pressure corrected by the correction means with the criterion for failure diagnosis or by comparing the corrected failure diagnosis criterion corrected by the correction means with the detected pressure.

5. 发明专利

JP2000110673A LEAK DETECTION DEVICE FOR EVAPORATED FUEL GAS TREATING DEVICE 失效
公开(公告)号：JP2000110673A
公开(公告)日：2000-04-18
申请号：JP28092198
申请日：1998-10-02
申请人： MITSUBISHI MOTORS CORP
发明人： SAKAGAMI TOMONOBU , KANAO HIDETSUGU
IPC分类号： F02M25/08 , F02D41/02 , F02D45/00 , F02M37/00 , G01M3/26
摘要： PROBLEM TO BE SOLVED: To provide a leak detection device for an evaporated fuel gas treating device which can properly detect fuel leak at all times by eliminating effect of an increase in the inner pressure of a fuel tank caused by the evaporation of fuel. SOLUTION: Evaporation correlative temperature T to be correlative with the amount of fuel evaporation is estimated based on gas phase temperature Tair and liquid phase temperature Tfuel within a fuel tank (S112), a leak judging valve ΔP0 is set up based on evaporation correlative temperature T (S114), a pressure restoring condition at the time when the line pressure of a fuel evaporated gas treating device is decompressed, is compared with a leak judging valve ΔP0 in order to determine any leak, and judgement on leak is made regardless of the temperature distribution in the inside of the fuel tank based on a leak judging valve ΔP0 to be correlative with the amount of fuel evaporation.

6. 发明专利

JP2001050116A FAILURE DIAGNOSTIC DEVICE FOR EVAPORATION PURGE SYSTEM 失效
公开(公告)号：JP2001050116A
公开(公告)日：2001-02-23
申请号：JP22363599
申请日：1999-08-06
申请人： MITSUBISHI MOTORS CORP
发明人： TAKATSUKA TAKASHI , KANAO HIDETSUGU , SAKAGAMI TOMONOBU , SAITO KENJI , KUME TAKEO , FUKUDA HARUMOTO
IPC分类号： B60K15/06 , F02D41/22 , F02M25/08
摘要： PROBLEM TO BE SOLVED: To prevent erroneous determination for a failure due to sloshing, so as to surely make judgement of a failure even in any operating condition. SOLUTION: Diagnosis of an evaporation purge system in accordance with a pressure in an evaporation passage detected by a pressure sensor 25 is permitted under such a condition that a pressure reducing process which is effected in the evaporation passage by a negative pressure produced in an intake pipe 11 by closing a vent control valve 20 provided in an exhaust pipe 21 led from a canister 17, and a pressure recovery process in which a pressure is recovered in the evaporation passage by closing a purge control valve 18 provided in a supply pipe 19 are repeated by several times.

7. 发明专利

JP2000045851A FAILURE DETERMINATION DEVICE FOR WATER TEMPERATURE SENSOR 失效
公开(公告)号：JP2000045851A
公开(公告)日：2000-02-15
申请号：JP21000698
申请日：1998-07-24
申请人： MITSUBISHI MOTORS CORP
发明人： SAKAGAMI TOMONOBU , KANAO HIDETSUGU , MIYAKE MITSUHIRO , MATSUMOTO TAKUYA
IPC分类号： G01K7/00 , F02D45/00 , G01K7/02
摘要： PROBLEM TO BE SOLVED: To precisely discriminate failure of a water temperature sensor irrespective of engine operation conditions. SOLUTION: Limit time Tlmt required for cooling water temperature WT of an internal combustion engine at the time of cooling reaching a specified value WF/B is set based on a quantity of heat estimated by an intake air amount senseds by an air flow sensor. Failure is determined when the sensed value by the water temperature sensor does not reach the specified value WF/B within the time Tlmt, that is, the sensed value is slowly increased. It is thus possible to precisely determine failure since the determination is executed while considering quantity of heat fluctuated according to an operation condition of the internal combustion engine.

8. 发明专利

JPH11190256A FAILURE DIAGNOSTIC DEVICE FOR FUEL EVAPORATIVE EMISSION PROCESSING SYSTEM 失效
公开(公告)号：JPH11190256A
公开(公告)日：1999-07-13
申请号：JP35816897
申请日：1997-12-25
申请人： MITSUBISHI MOTORS CORP
发明人： SAKAGAMI TOMONOBU , KANAO HIDETSUGU , YOSHIMURA KEIJI , MIYAKE MITSUHIRO , ONO YOSHINORI , MATSUMOTO TAKUYA
IPC分类号： F02M25/08 , F02D45/00
摘要： PROBLEM TO BE SOLVED: To provide a failure diagnostic device capable of determining whether or not a fuel evaporative emission processing system has failed, not only when a vehicle is traveling but also when it is stopped. SOLUTION: When an electronic control unit 20 detects that an external signal ordering the execution of diagnosis on failure is supplied to the electronic control unit 20 from a tester 40 connected to the external signal input terminal 22 of the unit 20, the unit 20 closes a bent solenoid valve 15 and opens a purge solenoid valve 14 to decompress the inside of a fuel tank 5 by means of intake negative pressure. During the decompression or after the decompression is complete, whether or not the seal of the fuel tank is defective is determined according to changes in internal pressure of the tank which are detected by a pressure sensor 17.

9. 发明专利

JPH04272429A INTERNAL COMBUSTION ENGINE PROVIDED WITH TURBO SUPERCHARGER 失效
公开(公告)号：JPH04272429A
公开(公告)日：1992-09-29
申请号：JP3419491
申请日：1991-02-28
申请人： MITSUBISHI AUTO ENG , MITSUBISHI MOTORS CORP
发明人： MIYAKE MITSUHIRO , HASHIMOTO TORU , SAKAGAMI TOMONOBU , ICHIKAWA KOJI
IPC分类号： F02B37/16 , F02B37/00
摘要： PURPOSE:To prevent malfunction of an air flow sensor at the time of deceleration and control opening/closing of a bypass valve with a proper timing by controlling operation of an actuator which opens/closes the bypass valve based on an opening of a throttle valve or a pressure in an intake pipe. CONSTITUTION:A bypass passage 22 is arranged such that its upstream side end is communicated with an intake pipe 14 at an upstream side portion compared to a pump impeller of a turbo supercharger, while its downstream side end is communicated with the intake pipe 14 at a portion between the pump impeller 17 and a throttle valve 19. The bypass passage is opened or closed by means of an actuator 39 through a bypass valve 40. An opening of a throttle valve 19 is detected by sensors 36, 37, while a pressure in the intake pipe 14 at a portion between the pump impeller 17 and the throttle valve 19 is detected by a sensor 41. The operation of the actuator 39 is controlled by means of an electronic control unit 34 based on detected signals from the sensors 36, 37, 41.

10. 发明专利

JPH04112937A FUEL CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH04112937A
公开(公告)日：1992-04-14
申请号：JP23157290
申请日：1990-08-31
申请人： MITSUBISHI MOTORS CORP
发明人： MIYAKE MITSUHIRO , HASHIMOTO TORU , SAITO YASUHIKO , SAKAGAMI TOMONOBU
IPC分类号： F02D41/12 , F02D45/00
摘要： PURPOSE:To prevent engine stop or the like by obtaining the supply fuel data at the time of deceleration based on the change of load in the decreasing direction when the load of an engine has suddenly decreased, and by decreasing the supply fuel quantity on the basis of this data, and also by restricting the decreasing action in an operating region less than a prescribed load region. CONSTITUTION:In a fuel control device in which a solenoid valve 8 being provided to each cylinder is controlled by an ECU 23, a basic-driving-time determining means 35 for determining a basic driving time TB for the solenoid valve 8 is provided to the ECU 23. And also an air-fuel ratio correction factor setting means 36 for setting an air-fuel ratio correction factor KAF in correspondence to the operating condition of an engine; correction means 40 to 42 for setting respective correction factors in correspondence to the engine cooling-water temperature, intake-air temperature, and the atmospheric pressure; an acceleration increment correction means 43 for setting an acceleration increment correction time TACL; a deceleration decrement correction means 45 for setting a deceleration decrement correction time TDCL; or the like are provided. And by the action of the deceleration decrement correction means 45, supply fuel quantity is decreased on the basis of the supply fuel data at the time of deceleration that has been obtained on the basis of the change of load in the decreasing direction, and in the operating region less than a prescribed load region, the decreasing action is restricted.

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