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81. 发明专利

JPH07310609A VAPORIZED FUEL TREATING DEVICE 失效
公开(公告)号：JPH07310609A
公开(公告)日：1995-11-28
申请号：JP10025394
申请日：1994-05-13
申请人： TOYOTA MOTOR CORP
发明人： OSANAI AKINORI
IPC分类号： F02M25/08 , F02M33/00 , F02M37/00
摘要： PURPOSE:To simplify a mechanism to liquefy vaporized fuel and to prevent incurring of a cooling energy loss. CONSTITUTION:A canister housing 34 in which granular activated coals 55 and 56 are contained and a fuel tank 23 are interconnected through a first passage 30. A housing 34 and the intake air passage 7 of an engine are interconnected through a second passage 31 and an on-off valve 32 is located in the middle of the passage 31. During closing of an on-off valve 32, vaporized fuel generated from liquid fuel 20 in the fuel tank 23 is adsorbed to the activated coals 55 and 56 and during opening of the on-off valve 32, fuel adsorbed to the activated coals 55 and 56 is eliminated and discharged in the intake air passage 7. A liquid fuel storage container 43 is embedded in the activated coals 55 in the housing 34 and when vaporized fuel from the fuel tank 23 passes through the storage container 43, fuel is eliminated from the activated coals 55 and 56 and the vaporized fuel is cooled through endothermic operation occurring when fuel is eliminated from the activated coals 55 and 56 and gasified, and stored in a liquid state in the storage container 43.

82. 发明专利

JPH07269399A EVAPORATION FUEL PROCESSOR 失效
公开(公告)号：JPH07269399A
公开(公告)日：1995-10-17
申请号：JP6090894
申请日：1994-03-30
申请人： TOYOTA MOTOR CORP
发明人： OSANAI AKINORI , NAGAI TOSHINARI , HARIMA KENJI , YUDA SHIYUUJI , KANAI HIROSHI , IWANO KAZUHIKO
IPC分类号： F02D41/00 , F02D41/02 , F02D41/14 , F02D43/00 , F02M25/08
摘要： PURPOSE:To provide an evaporation fuel processor which can make the change of an air-fuel ratio small at the change control time of a purge rate. CONSTITUTION:The fuel that has evaporated in a fuel tank 13 is accumulated in a canister 14 through vapor piping 133. When a purge valve 142 is opened during operation, the fuel accumulated in the canister 14 is led to an air intake pipe 11 by means of the negative pressure of the air intake pipe 11, and is used as fuel. When the purge valve 142 is opened rapidly at the time of purge start, an air-fuel ratio is changed largely, so this processor possesses a means that makes a purge rate large step by step and at the same time learns the density of evaporation fuel to be purged, and when the degree of learning is small, it is considered that the fear of giving disturbance to the air-fuel ratio is high, and so the change rate of the purge rate is made small.

83. 发明专利

JPH07253040A AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH07253040A
公开(公告)日：1995-10-03
申请号：JP4593994
申请日：1994-03-16
申请人： TOYOTA MOTOR CORP
发明人： OSANAI AKINORI
IPC分类号： F02M25/08 , F02D41/02 , F02D41/14
摘要： PURPOSE:To improve precision of judgement of completion of air-fuel ratio learning, and also to make the air-fuel ratio learning efficiently. CONSTITUTION:An air fuel ratio controller is provided with an air-fuel ratio control means 21 for carrying out the feedback control and the learning control per learning range, a learning completion judging means 22 for the judging learning completion per range, and the other control carrying-out means 23 for carrying out the other control in the completion range. And the completion judging means 22 is provided with a first learning completion setting means 24 for setting the judged result per range and a second learning completion setting means 25 for setting that the learning is complete also other already in set range when it is judged that the learning is completed in the set range after an engine is started. And it is provided with a clear means 26 for clearing the learning completion setting in all ranges when it is judged that the learning is not yet completed in the set range in which leaning has been already completed after the engine is started.

84. 发明专利

JPH0633844A CONTROLLER FOR INTERNAL PRESSURE OF FUEL TANK 失效
公开(公告)号：JPH0633844A
公开(公告)日：1994-02-08
申请号：JP18517492
申请日：1992-07-13
申请人： TOYOTA MOTOR CORP
发明人： KIDOKORO TORU , ITO TAKAAKI , HIYOUDOU YOSHIHIKO , OSANAI AKINORI
IPC分类号： B60K15/077 , F02M37/00
摘要： PURPOSE:To generate a differential pressure in the set pressure of the inside- tank pressure in the engine operation and operation stop by a simple structure, as for an inner pressure controller for a fuel tank which properly controls the internal pressure of the fuel tank in operation and in stop of an internal combustion engine. CONSTITUTION:During the purge execution when a VSV 40 is opened in operation and fuel is discharged into a suction passage 43 from a canistor 36, a negative pressure is applied to a negative pressure passage 35 through the canister 36 and a port 42. Accordingly, as for an inside-tank pressure control valve 27, a negative pressure PA is introduced into a space 29, and the pressure in a space 29, i.e., the inside-tank pressure PT becomes P1-PA. In this case, P1 is set by a diaphragm 36 and a spring 31, P1>PA. Further, since no negative pressure is introduced into the negative pressure passage 35 on the stop of operation, the tank inside pressure PT becomes P1.

85. 发明专利

JPH05340315A 失效
公开(公告)号：JPH05340315A
公开(公告)日：1993-12-21
申请号：JP14454392
申请日：1992-06-04
申请人： TOYOTA MOTOR CORP
发明人： HIYOUDOU YOSHIHIKO , ITO TAKAAKI , OSANAI AKINORI , KIDOKORO TORU
IPC分类号： F02M25/08
摘要： PURPOSE:To prevent deterioration of control performance of an air-fuel ratio by fully suppressing variation of the concentration of vapor which is purged. CONSTITUTION:Vapor is forcibly sucked from a canister 14 by a purge pump 20, and then discharged to a purge control valve 23. A part of vapor discharged from the purge pump 20 to the purge control valve 23 is circulated in the suction side of the purge pump 20, and mixed with the vaport sucked by the canister 14.

86. 发明专利

JPH05324090A FLOW RATE CONTROL METHOD 失效
公开(公告)号：JPH05324090A
公开(公告)日：1993-12-07
申请号：JP12907792
申请日：1992-05-21
申请人： TOYOTA MOTOR CORP
发明人： OSANAI AKINORI , ITO TAKAAKI , HIYOUDOU YOSHIHIKO , KIDOKORO TORU
IPC分类号： G05B11/26 , G05D7/06
摘要： PURPOSE:To reduce noises and to improve durability by decreasing the number of frequencies of opening and closing each control valve while alternately opening and closing a pair of duty control valves for each duty cycle. CONSTITUTION:A pair of control valves VSV 1 and VSV 2 are connected in parallel, selecting to use one of them as a main valve for each duty cycle in turn. When a duty ratio exists within the maximum duty ratio of a control valve set as a main valve, only the control valve recognized as a main valve is opened and closed in the duty cycle so that the control valves VS1 and VS2 are opened and closed in turn. When the duty ratio PGDUTY of the control valve VSV 1 recognized as a main valve in a duty cycle TD1 exceeds 100, the control valve VSV 1 is opened continuously for a remaining duty ratio (PGDUTY-100) time in a following cycle TD2 and the control valve VSV 2 recognized as a main valve is closed. Thus, control valves are opened and closed in turn, reducing the number of frequencies of opening and closing.

87. 发明专利

JPH05248315A 失效
公开(公告)号：JPH05248315A
公开(公告)日：1993-09-24
申请号：JP4889192
申请日：1992-03-05
申请人： TOYOTA MOTOR CORP
发明人： OSANAI AKINORI , ITO TAKAAKI , HIYOUDOU YOSHIHIKO , KIDOKORO TORU
IPC分类号： F02D45/00 , F02M25/08
摘要： PURPOSE:To increase the amount of purging, and calculate concentration of purged vapor highly accurately without error for an evaporated fuel treating device of an internal combustion engine. CONSTITUTION:Purging is stopped by a purge stopping means M6 at the time of taking in an air fuel ratio learning data. An idling region air fuel ratio learning data and an idling region intake air amount are taken in by an idling region learning means M7 just once at the time of idling. A large air amount region air fuel ratio learning data is taken in by a large air amount region learning means M8 at a predetermined region of large intake air amount. An air fuel ratio learning item corresponding to the intake air amount at a time is calculated by a learning item calculation means M9 by using the idling region air fuel ratio learning data, the intake air amount in the idling area and the large air amount region air fuel ratio learning data.

88. 发明专利

JPH05223021A EVAPORATED FUEL DISPOSAL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH05223021A
公开(公告)日：1993-08-31
申请号：JP2394992
申请日：1992-02-10
申请人： TOYOTA MOTOR CORP
发明人： OSANAI AKINORI , ITO TAKAAKI , HIYOUDOU YOSHIHIKO , KIDOKORO TORU
IPC分类号： F02M25/08 , F02D41/02 , F02D43/00
摘要： PURPOSE:To provide an evaporated fuel disposal device for an internal combustion engine which can carry out an early purge without disturbing the air-fuel ratio. CONSTITUTION:Evaporated fuel accumulated in a canister M1 is controlled, in its purge volume, by a purge control valve M3 controlled by a purge control valve control means M2, and is discharged into an disposed in an intake passage downstream of a throttle valve in an internal combustion engine M4. Upon fuel cut by a fuel injection control means M5, the purge control valve control means M2 stops the purge of evaporated fuel. A restart purge volume setting means 7 sets the purge volume to a value which is based upon the concentration of evaporated fuel before the fuel cut which is calculated by a vapor concentration calculating means M6 when the purge is restarted after completion of the fuel cut, and a purge value at that time. Further, a fuel injection volume compensating means M8 compensates the fuel injection volume in accordance with a compensated value which is calculated based upon the purge volume and the concentration of evaporated fuel at that time.

89. 发明专利

JPH05133261A AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH05133261A
公开(公告)日：1993-05-28
申请号：JP29441591
申请日：1991-11-11
申请人： TOYOTA MOTOR CORP
发明人： OSANAI AKINORI , ITO TAKAAKI , HIYOUDOU YOSHIHIKO , KIDOKORO TORU
IPC分类号： F02D41/14 , F02D41/32 , F02M25/08
摘要： PURPOSE:To improve the ability to control the air-fuel ratio when the air-fuel ratio largely deviates to the rich side. CONSTITUTION:A purge control solenoid valve 24 and a change-over valve 25 are provided in a purge passage of a canister 22, one side of the changeover valve 25 is connected to an intake pipe 15, and the other side of the valve is connected to the tip part 14a, namely, the fuel outlet side of an injector 14. When the condition for performing purge is established, the solenoid valve 24 is opened, and the change-over valve 25 is connected to the side of the intake pipe 15 to perform a usual purge. When the air-fuel ratio of intake air largely deviates to the rich side due to the purge or other causes, the change-over valve 25 is connected to the injector 14 side to supply a purge has having the pressure approaching the atmospheric pressure to the tip part 14a. Thus, since the pressure difference between the fuel pressure in the injector 14 and the pressure on the outlet side of fuel is reduced, and the fuel injection quantity of the injector 14 is reduced, the range of correction of the air-fuel ratio to the lean side is enlarged compared to a conventional range.

90. 发明专利

JPH04347357A EVAPORATING FUEL COLLECTOR 失效
公开(公告)号：JPH04347357A
公开(公告)日：1992-12-02
申请号：JP11847591
申请日：1991-05-23
申请人： TOYOTA MOTOR CORP
发明人： OSANAI AKINORI
IPC分类号： F02M25/08 , F02M33/08
摘要： PURPOSE:To accelerate the recovery of a canister for evaporating fuel adsorption capacity as well as to make the working capacity maintainable large enough by constituting the extent of internal pressure in the charcoal canister so as to make it maintainable to the specified pressure higher than the atmospheric pressure in the case other than a purged state. CONSTITUTION:Evaporating fuel generated out of fuel 12 in a fuel tank 10 is entered in a trapper 36 by way of a vapor line 46 by dint of vapor pressure. Next, a check valve 38 is opened and it is moved into a lower chamber 34, thus it is adsorbed to active carbon grains 48. When intake negative pressure acts on a purge chamber 50 at the time of medium high load driving of an engine, the evaporating fuel is drawn in an intake passage 56 by way of a purge line 52 by dint of a pressure differential and fed to a combustion chamber. If the lower chamber 34 canes to negative pressure, this negative pressure acts on an upper chamber 32 through filters 30, 28 and an active carbon layer, whereby a check valve 60 is opened and air is taken thereinto, thus the adsorbed fuel is separated, and this fuel is designed so as to be put back to the fuel tank 10 by way of a back purge line 44.

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