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1. 发明专利

JPH06212955A CATALYST DETERIORATION DETECTING APPARATUS FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH06212955A
公开(公告)日：1994-08-02
申请号：JP2729293
申请日：1993-01-22
申请人： HONDA MOTOR CO LTD
发明人： TAKIZAWA TAKESHI , SEKI YASUNARI , IWATA YOICHI , SATO TOSHIHIKO , NAKAYAMA TAKAYOSHI
IPC分类号： F02D41/14 , F01N3/20 , F01N11/00 , F02D41/22 , F02D45/00
摘要： PURPOSE:To provide a catalyst deterioration detecting apparatus for an internal combustion engine which can judge the deterioration of a catalyst accurately irrespective of exhaust flow in an exhaust system. CONSTITUTION:A judged value TCHKLMT determines a judged value TCHKLMT by searching a TCHKLMT table set according to an intake air amount showing an exhaust flow (step S182). When a judging time TCHK calculated from reversal times TL, TR of the output of an 02 sensor in the downstream of a catalyst exceeds the judged value TCHKLMT the oxygen storage capacity of the catalyst is assumed to exceed a reference and an exhaust purifying system is judged to be normal (step S183, step S184). When the judging time TCHK is smaller than the judged value TCHKLMT, the oxygen storage capacity of the catalyst is assumed less than the reference to judge that the exhaust purifying system is abnormal (step S183, step S185).

2. 发明专利

JPH06173744A FUEL SUPPLY CONTROL METHOD FOR MULTI-CYLINDER ENGINE 失效
公开(公告)号：JPH06173744A
公开(公告)日：1994-06-21
申请号：JP32769192
申请日：1992-12-08
申请人： HONDA MOTOR CO LTD
发明人： CHIKAMATSU MASATAKA , SEKI YASUNARI , MAEDA KENICHI
IPC分类号： F02D41/22 , F02D41/36
摘要： PURPOSE:To control fuel supply based on the result of a misfire cylinder detection while preventing a catalyst from deteriorating by increasing the quantity of fuel to be supplied to an engine based on the detection of a misfire cylinder. CONSTITUTION:An intake manifold 3 is provided with fuel injection valves 7... individually corresponding to cylinders C..., and the fuel supply to each cylinder C from each fuel injection valve 7 is controlled by a control means 8. When an engine is normally running without a misfire based on the feedback of oxygen concentration indicating the air fuel ratio in exhaust gas, the control means 8 controls the quantity of fuel to be supplied to all the cylinders C..., and while the engine is running at speed NE that is set at high engine speed or lower with a misfire detected on some cylinders, the control means 8 controls the operation of the fuel injection valve 7 so as to increase the quantity of fuel supply to cylinders C without a misfire with this constitution, fuel temperature can be restricted low and catalysts can be prevented from thermal damaging while preventing running performance from deteriorating by avoiding power shortage caused by fuel supply stop.

3. 发明专利

JPH05106494A CATALYST DETERIORATION DETERMINATION DEVICE 失效
公开(公告)号：JPH05106494A
公开(公告)日：1993-04-27
申请号：JP27120491
申请日：1991-10-18
申请人： HONDA MOTOR CO LTD
发明人： SEKI YASUNARI , IWATA YOICHI , TAKIZAWA TAKESHI , MAEDA KENICHI , SATO TOSHIHIKO , KURODA YOSHITAKA , CHIKAMATSU MASATAKA , TERADA KAZUHIRO , SAWAMURA KAZUTOMO
IPC分类号： F02D41/14 , F01N3/20 , F02D41/22
摘要： PURPOSE:To provide a catalyst deterioration determination device which is rarely affected by the dispersion and deterioration of unitary performance of an O2 sensor. CONSTITUTION:Ordinarily, a first air fuel ratio control means M1 feed-back- controls an air fuel ratio based on the output of both an upstream side O2 sensor FS and a downstream side O2 sensor RS for a catalyst C. When an operation state determination means M3 identifies a specified engine operation state, an adjustment means switch means M4 switches from a first air fuel ratio adjustment means M1 to a second air fuel ratio adjustment means M2 and feed-back-controls the air fuel ratio based on only the output of the downstream side O2 sensor RS. At this time, a time measuring means M6 measures the length of time between the point of time when the amount of skip which causes the increase of the air fuel ratio occurs and the point of time when a reverse determination means M5 detects the reversal of the output of the downstream side O2 sensor RS and when the length of time becomes shorter than a specified value, a catalyst deterioration determination means M7 determines that the catalyst C is deteriorated.

4. 发明专利

JPH04265458A FAILURE DIAGNOSTIC DEVICE FOR VAPOR FUEL TREATMENT SYSTEM OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH04265458A
公开(公告)日：1992-09-21
申请号：JP4768991
申请日：1991-02-20
申请人： HONDA MOTOR CO LTD
发明人： SEKI YASUNARI , KURODA YOSHITAKA , SAWAMURA KAZUTOMO , UDAGAWA MASATOSHI
IPC分类号： F02D45/00 , F02M25/08
摘要： PURPOSE:To improve the failure diagnosis accuracy of vapor fuel system for an internal combustion engine. CONSTITUTION:A failure diagnostic device is composed of temp. sensors 31, 32 detecting the temp. inside a canister, pressure control valve 26, surge cut valve 28, and serves to carry out failure diagnosis on the basis of detection temp. of the sensors 31, 32 through controlling the charge and surge conditions of the canister by means of the pressure control valve 26 and the surge cut valve 28.

5. 发明专利

JPH04103865A EXHAUST AIR CIRCULATION CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH04103865A
公开(公告)日：1992-04-06
申请号：JP22084290
申请日：1990-08-21
申请人： HONDA MOTOR CO LTD
发明人： SEKI YASUNARI , KASHIWABARA SHIGETO , KAGA TAKAHIKO
IPC分类号： F02D21/08 , F02D45/00 , F02M25/07
摘要： PURPOSE:To accurately detect failures in an exhaust air circulation control system in either transition or normal operations by judging that the exhaust air circulation control system is at fault when the deviation of the actual value of valve opening from a target value of valve opening is equal to or more than a specified value in response to engine operations. CONSTITUTION:An EGR valve 16 is provided with a valve opening sensor 26, the valve opening sensor 26 detects the operating position of the valve body 18 of the EGR valve 16 so as to forward the detected signal to an ECU 5. The ECU 5 judges whether or not the value of an output signal from the valve opening sensor 26 is abnormal, and concurrently judges the operating conditions of an engine 1 based on the detected signals from various sensors such as a thetaTH sensor 4, a PBA sensor 7, a TW sensor 8, a Ne sensor 9, an O2 sensor 12 and a PA sensor 13, so that the target value of valve opening of the EGR valve 146 in response to the result of the judgement is operated so as to be set up. And when the deviation of the actual value of valve opening from the target value of valve opening is equal to or more than a specified value in response to engine operations, it is thereby judged that an exhaust air circulation control system is at fault.

6. 发明专利

JPH0318607A METHOD FOR DETECTING FAILURE OF VALVE TIMING SWITCHING CONTROLLER FOR INTERNAL COMBUSTION CHAMBER 失效
公开(公告)号：JPH0318607A
公开(公告)日：1991-01-28
申请号：JP15284789
申请日：1989-06-15
申请人： HONDA MOTOR CO LTD
发明人： SEKI YASUNARI , TACHIBANA YOSUKE
IPC分类号： F01L13/00 , F01L1/26 , F01L1/34 , F01L1/46 , F02D13/02 , F02D41/14 , F02D41/22
摘要： PURPOSE:To securely detect the abnormality of a valve timing switching controller by using the value of a coefficient changing according to the output of an exhaust gas concentration detector used in air-fuel ratio feedback control. CONSTITUTION:A valve timing switching controller, which switches and controls the valve timing of, at least, one of an intake valve or an exhaust valve according to the operating condition of an internal combustion engine 1 is provided. The air-fuel ratio of air-fuel mixture supplied to the engine 1 is feedback- controlled to a desired value by using a coefficient changing according to the output of O2 sensors 151-154 arranged in the exhaust manifolds 131-134 of the engine 1. Hereupon, ECU5 finds the learning value of the coefficient obtained during the feedback control so as to compare the value of the coefficient with the found out learning value. On the basis of this compared result, the failure of the valve timing switching controller is detected. Thus the failure can be detected securely by a simple method.

7. 发明专利

JPH039010A TROUBLESMOOTING METHOD FOR INTERNAL COMBUSTION ENGINE VALVE TIMING CHANGE-OVER CONTROL DEVICE 失效
公开(公告)号：JPH039010A
公开(公告)日：1991-01-16
申请号：JP13969689
申请日：1989-06-01
申请人： HONDA MOTOR CO LTD
发明人： SEKI YASUNARI , YAHATA ISAO
IPC分类号： F01L13/00
摘要： PURPOSE:To make a troubleshooting with low cost and precision by comparing a change-over signal to be outputted to a valve timing change-over mechanism according to an engine operating condition with a detected suction air amount signal for the failure detection of a valve timing change-over mechanism. CONSTITUTION:A valve timing change-over control device operates a connection change-over mechanism when a valve opening command signal is outputted from ECU5 to an electromagnetic valve 22 so as to mutually connect respective rocker arms cooperating with a cam for low speed and a cam for high speed and to change over an engine valve from low speed valve timing to high speed valve timing for opening and closing. When a prescribed time has passed after the instruction of the valve timing had been changed over to the high speed valve timing, it is judged whether or not the actual suction air amount by a suction air amount sensor 9 is beyond the permissible range of suction air amount while the change-over mechanism is operating properly. When YES is judged, it is judged as valve timing failure, so as to generate an alarm.

8. 发明专利

JPH02308913A ABNORMALITY DETECTING METHOD FOR VALVE TIMING SWITCHING DEVICE OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02308913A
公开(公告)日：1990-12-21
申请号：JP13212989
申请日：1989-05-25
申请人： HONDA MOTOR CO LTD
发明人： SEKI YASUNARI , TSUKIMURA KIYOSHI , TACHIBANA YOSUKE
IPC分类号： F01L1/46 , F01L13/00
摘要： PURPOSE:To positively detect any failure of a valve timing switching mechanism by means of a relative simple constitution by comparing detection values of intake pressure on the upstream of an intake valve with a specified discriminant value. CONSTITUTION:In an engine 1, single pipe parts 2'' of an intake manifold 2' are con nected to respective cylinders, and throttle jets 24 are provided in single pipe parts 2'' close to an intake valve on the upstream of the intake valve. Surge tanks 26 are connected through pipes 5 to respective throttle jets 24, and further manifold absolute pressure sensor 16 are connected to the throttle jets. In the engine 1 where the valve timing V/T is switched to 'high speed' or 'low speed' depending on operating conditions, intake negative pressure in single pipe parts 2'' are smaller at the time of high speed V/T than that at the time of low speed V/T even when the opening of a throttle valve is the same. Thus, any abnormality with which a V/T switching mechanism remains fixed to high speed V/T is spite of low speed V/T indication, can be detected by comparing the intake negative pressures in respective cylinders detected during idle running of the engine by the manifold absolute pressure sensors 16 with a specified discriminant value.

9. 发明专利

JPH0248739B2 失效
公开(公告)号：JPH0248739B2
公开(公告)日：1990-10-26
申请号：JP21482085
申请日：1985-09-30
申请人： HONDA MOTOR CO LTD
发明人： KAWANABE TOMOHIKO , ASAKURA MASAHIKO , KUSHIDA NORITAKA , SEKI YASUNARI
IPC分类号： F02M1/08

10. 发明专利

JPH02161154A CONTROLLER FOR ENGINE 失效
公开(公告)号：JPH02161154A
公开(公告)日：1990-06-21
申请号：JP16271689
申请日：1989-06-27
申请人： HONDA MOTOR CO LTD
发明人： SEKI YASUNARI , YAHATA ISAO
IPC分类号： F02D41/22 , F01L1/26 , F02D13/02 , F02D31/00 , F02D43/00 , F02D45/00
摘要： PURPOSE:To extend upper limit of speed for the mechanism where a valve timing variable means is provided on either or both of suction or/and exhaust valves by altering the speed that is to be a standard to reduce the engine output during acceleration according to the alteration of valve timing. CONSTITUTION:In a valve timing variable means, suction and exhaust valves are driven open/close by means of a cam for low speed in a non-connected condition of a driving rocker arm and a free rocker arm, as well as by means of a cam for high speed in a connected condition of these, and the connected condition is switch-controlled by means of controlling an electromagnetic valve 19 by an electronic control circuit 7 through a switching mechanism. In the electronic control circuit 7, when an engine driving is so accelerated that the engine speed reaches the predetermined high speed, a fuel injection valve 6 is controlled in such a way that the engine output is reduced. The speed that is to be a standard for judgement in reducing the engine output is altered according to the switching operation of valve timing.

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