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1. 发明专利

JP2001193570A DIAGNOSTIC DEVICE FOR GASEOUS FUEL ENGINE 失效
公开(公告)号：JP2001193570A
公开(公告)日：2001-07-17
申请号：JP2000003767
申请日：2000-01-12
申请人： HITACHI LTD , NISSAN KOKI KK , NISSAN MOTOR
发明人： SATO MASAHIRO , KATO TAKESHI , YAMADA TAKU , NISHIDE HIROTO
IPC分类号： F02M21/02 , F02B43/00 , F02D19/02
摘要： PROBLEM TO BE SOLVED: To diagnose accurately without affecting operability whether a fuel pipe can be cut off by a cutoff valve intervened with just after a gaseous fuel tank of a gaseous fuel engine or not. SOLUTION: The cutoff valve is closed during operation of engine (S8) for judging that the cutoff valve really cuts off the fuel pipe (S18) when a drop amount ΔVcp in gaseous fuel pressure Vcp inside the fuel pipe after the cutoff operation exceeds a reference value ΔV within a diagnostic period Ts (S17, S19) while for judging that the cutoff valve is in open sticking state (S20) when the drop amount ΔVcp does not exceed the reference value ΔV within the diagnostic period Ts.

2. 发明专利

JP2002070632A ENGINE CONTROLLER WITH FAILURE DIAGNOSTIC DEVICE 失效
公开(公告)号：JP2002070632A
公开(公告)日：2002-03-08
申请号：JP2000256256
申请日：2000-08-25
申请人： HITACHI LTD , NISSAN MOTOR , NISSAN KOKI KK
发明人： SATO MASAHIRO , NISHIDE HIROTO , YAMADA TAKU , KATO TAKESHI
IPC分类号： F02M21/02 , F02D19/02 , F02D41/14 , F02D45/00
摘要： PROBLEM TO BE SOLVED: To improve reliability of diagnosis by separately and sequentially diagnosing failures of a fuel cutoff valve and a fuel pressure sensor in a supply pipeline system for gaseous fuel. SOLUTION: This engine controller for a gaseous fuel engine provided with the fuel cutoff valve, a fuel pressure controller, a first fuel pressure sensor detecting a fuel injection pressure, and a fuel injection valve, in this order from the upstream, has a first fuel pressure sensor diagnostic means and a fuel cutoff valve diagnostic means. The sensor diagnostic means has a first comparison means comparing a fuel pressure difference between the former and latter pressure in operation on the basis of a detection value of the sensor; a second comparison means comparing a difference between the detection value of the sensor and a fuel pressure estimation value, and a third comparison means comparing a fuel pressure correction value based on the detection value of the sensor with a prescribed value and comparing an air-fuel ratio correction value with a prescribed value. The sensor diagnostic means diagnoses a function of the sensor on the basis of the comparison results. The valve diagnostic means diagnoses a function of the fuel cutoff valve on the basis of a difference between the detection value of the sensor when the fuel cutoff valve closes and the detection valve of the sensor when the fuel cutoff valve opens, and diagnoses the function of the fuel cutoff valve after the diagnosis of the sensor function.

3. 发明专利

JP2001107808A FUEL FEEDING DEVICE FOR GAS ENGINE 失效
公开(公告)号：JP2001107808A
公开(公告)日：2001-04-17
申请号：JP28457199
申请日：1999-10-05
申请人： NISSAN KOKI KK , NISSAN MOTOR
发明人： KATO TAKESHI , YAMADA TAKU , NISHIDE HIROTO
IPC分类号： F02M21/02 , F02B43/00
摘要： PROBLEM TO BE SOLVED: To precisely detect the temperature and the pressure of actually injected fuel. SOLUTION: An injector 23 is provided to separately inject and feed fuel, consisting of compressed natural gas, to intake branches 13 respectively communicating with a plurality of cylinders. A fuel inlet pipe 28 to which fuel is fed is situated approximately at the central part in a longitudinal direction of an injector communicating gallery 24 to effect intercommunication between injectors 2. A fuel temperature sensor 29 to detect the temperature of fuel is situated at a connection part between a fuel inlet pipe 28 and an injector communicating gallery 24 and a fuel pressure sensor 35 to detect the pressure of fuel is situated between the two injectors 23 of the injector communication gallery 24 ion one side with the fuel inlet pipe 28 therebetween. According to the detecting values of the fuel temperature sensor 29 and the fuel pressure sensor, a fuel injection amount by the injector 23 is corrected and controlled.

4. 发明专利

JPH11200953A INJECTOR OF CNG ENGINE 失效
公开(公告)号：JPH11200953A
公开(公告)日：1999-07-27
申请号：JP795298
申请日：1998-01-19
申请人： NISSAN MOTOR
发明人： NISHII SATOSHI , YAMADA TAKU
IPC分类号： F01M9/04 , F02M21/02
摘要： PROBLEM TO BE SOLVED: To improve in the lubricativeness of a needle by installing a filter which atomizes an oil mist being contained in gas fuel and diffuses it in a fuel passage, in this CNG engine in use of compressed natural gas(CNG). SOLUTION: Gas fuel to be forcibly fed to an injector 1 passes through a filter 40, flowing into a fuel passage 4, and then it is sprayed out of a nozzle hole 11 of a nozzle 10 with a needle 2 lifting. At this time, any foreign substances in the gas fuel is filtrated by this filter 40, and thereby such a possibility that these foreign substances might be bitten into space between the needle 2 and the nozzle 10 and the gas fuel leaked from the injector 1 is prevented from occurring. Most of CNG are transmorted in a gaseous state, and since a trace of oil is mixed in a process till being fed as the CNG, an oil mist in the gas fuel is atomized by the filter 40 and diffused in the fuel passage 4, whereby it is stuck to a peripheral surface slidingly contacting with a guide 30 of the needle 2 and a valve element part 21 colliding with a seat surface 12, improving their lubricativeness.

5. 发明专利

JPH10238339A EXHAUST EMISSION CONTROL DEVICE 失效
公开(公告)号：JPH10238339A
公开(公告)日：1998-09-08
申请号：JP3649797
申请日：1997-02-20
申请人： NISSAN MOTOR
发明人： ISHIZUKA YASUJI , YAMADA TAKU
IPC分类号： F01N3/20 , F01N3/22 , F01N3/24 , F01N9/00 , F01N13/02
摘要： PROBLEM TO BE SOLVED: To effectively ensure exhaust gas purifying performance by comprising the start of energization delaying means for delaying the start of energization of an electric heating catalyst, with respect to the start of the secondary air supply from a secondary supply means, after the start of an engine, in a device for accelerating the activation of the catalyst. SOLUTION: A sub-catalyst 4 and a main catalyst 5 are mounted on the specific parts of an exhaust passage 3 connected with a downstream of an exhaust manifold of a V-type six-cylinder engine 1, and the secondary air is supplied to the exhaust manifold through a secondary air supply passage by an electric air pump 17. In the control of the energization of an electric heating catalyst(EHC) of the sub-catalyst 4, whether the energizing condition to EHC4A is satisfied or not, is judged, so that a delay in the start of energization to EHC4A is set while making reference to a map table corresponding to the water temperature of the engine 1, and the energization to EHC4A is delayed with respect to the supply of the secondary air, in case of YES, to activate the minimum capacity of catalyst in the early period.

6. 发明专利

JPH102215A SELF-DIAGNOSIS DEVICE FOR EXHAUST EMISSION CONTROLLER OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH102215A
公开(公告)日：1998-01-06
申请号：JP15392096
申请日：1996-06-14
申请人： NISSAN MOTOR
发明人： NOMURA TADASHI , YAMADA TAKU , NISHIZAWA MASAYOSHI
IPC分类号： F01N3/20 , F01N9/00
摘要： PROBLEM TO BE SOLVED: To diagnose an electrically heated catalyst by itself without deteriorating catalytic efficiency by calculating resistance of an electrically heated catalyst based on a drop in voltage across a current detecting resistance and, when the resistance is out of a specified range, by judging that the function of the electrically heated catalyst is deteriorated. SOLUTION: An electrically heated catalyst(EHC) 1 is disposed in an exhaust passage of an internal combustion engine to oxidize HC, CO in the exhaust and to reduce NOX. If the EHC 1 is not heated to a catalyst activating temperature, it can not exert fully an exhaust cleaning function. Therefore, it is provided with a temperature sensor 2 for detecting the temperature of the EHC 1 and is supplied with electricity to heat itself at the time of cold starting at which an exhaust amount of the HC is large in particular. In this constitution, when the EHC 1 is not supplied with an electricity from an alternator 6, it is supplied with an electricity from a battery to the EHC 1 via a resistance 10 and the resistance of the EHC 1 is detected based on a drop in voltage across the resistance 10, whereby a functional diagnosis of the EHC 1 is made without deteriorating a catalytic effect.

7. 发明专利

JP2005048625A Alcohol concentration estimating device for engine and engine control device 审中-公开
标题翻译：用于发动机和发动机控制装置的酒精浓度估算装置
公开(公告)号：JP2005048625A
公开(公告)日：2005-02-24
申请号：JP2003204522
申请日：2003-07-31
申请人： Nissan Motor Co Ltd , 日産自動車株式会社
发明人： YAMADA TAKU
IPC分类号： F02P5/15 , F02D41/02 , F02D41/14 , F02D45/00
摘要： PROBLEM TO BE SOLVED: To correctly estimate the alcohol concentration of working fuel even in case that an assumed air-fuel ratio exists in a region with no air-fuel ratio feedback control when alcohol containing fuel is used as the working fuel.
SOLUTION: The alcohol concentration estimating device for an engine comprises a target air-fuel ratio setting means 11 for setting a target air-fuel ratio to be richer or leaner than the theoretical air-fuel ratio of the alcohol non-containing fuel, an actual air-fuel ratio detecting means 17 for detecting the actual air-fuel ratio of the working fuel, and an alcohol concentration calculating means 11 for calculating the alcohol concentration of the working fuel in accordance with the ratio of the target air-fuel ratio to the detected actual air-fuel ratio.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：即使在使用含酒精的燃料作为工作燃料时，即使在没有空燃比反馈控制的区域中存在假定的空燃比的情况下，也能正确地估计工作燃料的酒精浓度。解决方案：发动机的酒精浓度估计装置包括目标空燃比设定装置11，用于将目标空燃比设定得比不含酒精的燃料的理论空燃比更浓或更浓，用于检测工作燃料的实际空燃比的实际空燃比检测装置17，以及用于根据目标空气燃料的比例计算工作燃料的酒精浓度的酒精浓度计算装置11 与所检测的实际空燃比的比率。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2001193571A DIAGNOSTIC DEVICE FOR GASEOUS FUEL ENGINE 失效
公开(公告)号：JP2001193571A
公开(公告)日：2001-07-17
申请号：JP2000003768
申请日：2000-01-12
申请人： HITACHI LTD , NISSAN KOKI KK , NISSAN MOTOR
发明人： SATO MASAHIRO , KATO TAKESHI , NISHIDE HIROTO , YAMADA TAKU
IPC分类号： F02M21/02 , F02D19/02 , F02D41/02 , F02D41/22 , F02D45/00 , F02M37/00
摘要： PROBLEM TO BE SOLVED: To diagnose pressure abnormality at the downstream side of a pressure regulator intervened with a fuel feeding system in a gaseous fuel engine. SOLUTION: A pressure sensor is intervened with the downstream side of the pressure regulator to correct injection quantity of gaseous fuel on the basis of pressure detected by the pressure sensor. When the pressure Vgp of gaseous fuel detected by the pressure sensor is out of a predetermined range S18, pressure abnormality at downstream side of the pressure regulator is judged S20. And at that time the pressure regulator is judged to be having trouble S22 if an air fuel ratio learning correction Lα is within a predetermined range S21 and the pressure sensor is judged to be having trouble S23 if the air fuel ratio learning correction Lα is out of the predetermined range.

9. 发明专利

JPH11159324A STRUCTURE OF EXHAUST MANIFOLD FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH11159324A
公开(公告)日：1999-06-15
申请号：JP32982897
申请日：1997-12-01
申请人： NISSAN MOTOR
发明人： YAMADA TAKU , NISHIZAWA MASAYOSHI
IPC分类号： F01N13/08 , F01N3/24 , F01N3/28 , F01N13/10 , F01N7/08 , F01N7/10
摘要： PROBLEM TO BE SOLVED: To improve exhaust emission performance with the early activation of a catalyst during cold start by improving the structure of an exhaust manifold to be a double structure. SOLUTION: A shell 15 is integrally formed in an inner tube 11 at the collective portion of an exhaust manifold 10 and a catalyst 14 for a catalyst converter device 13 is stored inside the shell 15. In this way, the catalyst 14 is heat- insulated from an outer tube 16 and heat transmitted to the inner tube 11 is transmitted directly to the catalyst 14 via a mat 17 so that heat energy of exhaust gas can be efficiently transmitted to the catalyst 14 and the catalyst can get earlier to an activating temperature.

10. 发明专利

JPH1113459A EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH1113459A
公开(公告)日：1999-01-19
申请号：JP16403897
申请日：1997-06-20
申请人： NISSAN MOTOR
发明人： NOMURA TADASHI , YAMADA TAKU
IPC分类号： F01N3/20 , F01N13/00 , F01N99/00 , F01N7/00
摘要： PROBLEM TO BE SOLVED: To prevent the excessive heating of an electric-heated catalyst converter by interposing a temperature sensing switch for cutting off a current supplied to the electric-heated catalyst converter by sensing the temperature increase of the electric-heated catalyst converter between a shell and an electrode. SOLUTION: An exhaust emission control device includes an electric-heated catalyst converter 5 interposed in a shell 4, a negative electrode 10 installed in the outer peripheral side of this electric-heated catalyst converter 5, a positive electrode installed in the opposite side thereof and an electric heating function for carrying a current to a carrier through these electrodes, electric heater function are provided. In this case, as a temperature sensing switch for cutting off a current supplied to the electric- heated catalyst converter 5 when the temperature of the electric-heated catalyst converter 5 is increased, a bimetal 1 is provided for connecting the negative electrode 10 with the shell 4. The tip part of this bimetal 1 is joined to the outer peripheral surface of the shell 4 when a temperature is equal to a specified level or lower and, when the temperature is increased more than the specified value, the tip part of the same is separated from the outer peripheral surface of the shell 4 and thereby carrying of the current is turned ON/OFF.

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