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51. 发明专利

JPH02221655A IDLING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02221655A
公开(公告)日：1990-09-04
申请号：JP4159989
申请日：1989-02-23
申请人： TOYOTA MOTOR CORP
发明人： SONODA YUKIHIRO , OSAWA KOICHI , KANAI HIROSHI , HOSHI KOICHI , MATSUOKA HIROKI , OHASHI MICHIHIRO , SAWADA YUTAKA
IPC分类号： F02D41/16 , F02D41/04 , F02D41/06 , F02D41/08 , F02D41/14
摘要： PURPOSE:To prevent the leaning of a mixture and ensure the satisfactory starting and stable operation of an engine by increasingly controlling the increase ratio of idling speed at the time of starting the engine according to an increase in adhered quantity of deposit. CONSTITUTION:Based on the output signal of an oxygen concentration detector 19 disposed in an engine exhaust passage, the injection quantity is controlled by a means A in such a manner that a mixture fed into the engine cylinder has a target air-fuel ratio. Based on the output signal of the oxygen concentration detector 19, the adhered amount of deposit is detected by a means B. The adhered amount of deposit is stored by a means C. The idling speed at the time of engine start is increased by a means D. The increasing ratio of the idling speed at the time of engine start is controlled by a means E in such a manner as to be increased as the adhered amount of deposit is increased. Hence, the leaning of the mixture is prevented, and the satisfactory starting and stable operation are ensured.

52. 发明专利

JPH02199248A FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02199248A
公开(公告)日：1990-08-07
申请号：JP1634789
申请日：1989-01-27
申请人： TOYOTA MOTOR CORP
发明人： SONODA YUKIHIRO , OSAWA KOICHI , KANAI HIROSHI , HOSHI KOICHI , MATSUOKA HIROKI , OHASHI MICHIHIRO , SAWADA YUTAKA
IPC分类号： F02D41/10 , F02D41/04 , F02D41/14 , F02D45/00
摘要： PURPOSE:To maintain an air-fuel ratio at a target value by a method wherein with the increase in the degree of acceleration, a lean/rich decision period of fuel-air mixture is decreased, and when the number of lean times is increased to a value a higher than the number of rich times by a value exceeding a set number, the increase of an injection fuel amount is effected for correction. CONSTITUTION:With the increase in the degree of acceleration decided by a degree of acceleration deciding means 50, a lean/rich decision period of fuel-air mixture is decreased by a decision period control means 51. During the decision period, lean/rich is decided at intervals of a crank angle predetermined by a lean/rich deciding means 52. A deviation between the number of times which it is decided that fuel-air mixture is lean and the number of times which it is decided that the mixture is rich is calculated by a calculating means 53. When the number of lean times is increased to a value higher than the number of rich times and a deviation therebetween exceeds a predetermined set number, an injection fuel amount control means 54 increases an injection fuel amount for correction, and drive of a fuel injection valve 12 is controlled. This constitution enables maintenance of an air-fuel ratio at a target value regardless of the degree of acceleration.

53. 发明专利

JPH02199245A FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02199245A
公开(公告)日：1990-08-07
申请号：JP1634489
申请日：1989-01-27
申请人： TOYOTA MOTOR CORP
发明人： OSAWA KOICHI , OHASHI MICHIHIRO , SAWADA YUTAKA , MATSUOKA HIROKI , MATSUMOTO SHINICHI
IPC分类号： F02D41/10 , F02D41/14
摘要： PURPOSE:To accurately detect the rich/lean condition of mixture by computing the period at which mixture is switched over between a lean condition and a rich one, and thereby computing the deviation in time between the lean condition and the rich one only for the time in response to said period at the time of accelerating operation. CONSTITUTION:A fuel injection quantity control means 50 controls the quantity of fuel injection from a fuel injection valve 12 based on output signals from an O2 sensor 19 in such a way that mixture to be supplied to an engine shall be of a target air-fuel ratio. In this case, the period at which mixture is switched over between a lean condition and a rich one, is computed by a period computing means 51 based on outputs from the O2 sensor 19, after accelerating operation detected by an accelerating condition detecting means 52 has been started, only for the time in response to the period, the deviation in time between the rich and lean conditions of mixture is obtained by a deviation computing means 53. Based on the deviation, the quantity of fuel injection is increased by an increasing means 54 when the lean condition is longer in time than the rich one and when the deviation exceeds a set value. Thus, the lean or rich condition is accurately detected at the time of accelerating operation, an air-fuel ratio can thereby be properly controlled.

54. 发明专利

JPH01273845A AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH01273845A
公开(公告)日：1989-11-01
申请号：JP10265788
申请日：1988-04-27
申请人： TOYOTA MOTOR CORP
发明人： MATSUOKA HIROKI
IPC分类号： F02D41/14 , F02D41/00 , F02D45/00 , G01N27/409
摘要： PURPOSE:To prevent the erroneous control of air-fuel ratio by adjusting the air-fuel ratio according to the outputs of the air-fuel ratio sensors installed on the upstream and downstream sides of a catalytic converter, when the base air-fuel ratio is rich or the output of a pull-up type input circuit is less than a prescribed value, in the constitution in which the air-fuel ratio sensors are provided. CONSTITUTION:Air-fuel ratio sensors 13 and 15 are installed on the upstream and downstream sides of a three-component catalyst in an exhaust passage, and the output of the downstream side sensor 15 is inputted into a pull-up type input circuit 12. The first judging means MA judges if the output of the input circuit 12 is less than an activity judging level A or not, and if the judge ment is 'YES', the second judging circuit MB judges if the base air-fuel ratio is rich or less according to the variation rate of the output of the input circuit 12. After the judgement, if the third judging means MC judges that the output of the input circuit 12 is less than a prescribed value C, an air-fuel ratio adjusting means MD adjusts the air-fuel ratio according to the output of the downstream sensor 15, besides the output of the upstream sensor 13.

55. 发明专利

JPH01224433A AIR-FUEL RATIO CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH01224433A
公开(公告)日：1989-09-07
申请号：JP4591088
申请日：1988-03-01
申请人： TOYOTA MOTOR CORP
发明人： MATSUOKA HIROKI
IPC分类号： F02D41/00 , F02D41/14 , F02D41/22
摘要： PURPOSE:To prevent deterioration of the rate of fuel consumption and/or emission by sensing shortcircuiting in an air-fuel ratio sensor connected to a pull-up type input circuit, and stopping the feedback control of the air-fuel ratio and/or alarm sendout in accordance with the result from this sensing. CONSTITUTION:A three-dimensional catalyst A is installed on the exhaust path of an internal-combustion engine, and also an air-fuel ratio sensor B is provided. Therein micro-current is supplied to this air-fuel ratio sensor B by the use of a pull-up type input circuit C, and also the output of the air-fuel ratio sensor B is entered. According to the output from this pull-up type input circuit C, the activated condition of the air-fuel ratio sensor B is judged by a means D. When the air-fuel ratio sensor B is in activated condition, the air-fuel ratio is adjusted by the means B in accordance with the output from the air-fuel ratio sensor B. On the other hand, a means F judges whether the output of the air-fuel ratio sensor B is at low level when the internal-combustion engine is going to start or operating in coldness. If low level, it is judged whether the air-fuel ratio sensor B is shortcircuiting.

56. 发明专利

JPH01190938A AIR-FUEL RATIO CONTROLLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH01190938A
公开(公告)日：1989-08-01
申请号：JP1357188
申请日：1988-01-26
申请人： TOYOTA MOTOR CORP
发明人： MATSUOKA HIROKI
IPC分类号： F02D41/14 , F02D41/00
摘要： PURPOSE:To permit the speedy restoration of the learned values of the air-fuel ratio control constants RSR and RSL by renewing the learned values to the larger optimum value side, when the memory contents of a back-up RAM as memory means is destroyed. CONSTITUTION:A control constant calculating means calculates the air-fuel ratio feedback control constants (skip quantity) RSR and RSL according to the output of a downstream side O2 sensor for three-component catalyst CCRO, and said control constants are memorized as learned values into a memory means, and the air-fuel ratio correction quantity FAF is calculated from the output of an upstream side O2 sensor. When a judging means judges the anomaly of the memorized contents, the memory means is initialized, and a compulsorily varying means varies the control constants RSR and RSL forcedly to the rich and lean sides alternately for a prescribed time, and each continuation time CR, CL of the rich and lean outputs of the downstream side O2 sensor is measured for the time of the above-described variation, and the learned values of the memory means are renewed to the larger values according to the above-described measurement. Therefore, the deterioration of the exhaust emission and fuel consumption can be prevented by the sharp restoration of the learned values.

57. 发明专利

JPH01163440A AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH01163440A
公开(公告)日：1989-06-27
申请号：JP31746487
申请日：1987-12-17
申请人： TOYOTA MOTOR CORP
发明人： MATSUOKA HIROKI
IPC分类号： F02D41/14 , F02D41/00 , F02D45/00
摘要： PURPOSE:To prevent active and inactive hunting of an air-fuel ratio sensor, by a method wherein, when it is discriminated that an air-fuel sensor on the downstream side is in an inactive state, an air-fuel ratio feedback control constant is forcibly displaced to the rich side or the lean side. CONSTITUTION:When an air-fuel ratio sensor on the downstream side is in an active state, a control constant computing means stores an air-fuel ratio feedback control constant according to an air-fuel ratio sensor V2 on the downstream side. When the air-fuel ratio sensor V2 on the downstream side is in an inactive state, after an air-fuel ratio feedback control constant is forcibly displaced to the rich side or the lean side by means of a forcible varying means, an active discriminating level VA is set to an active discriminating level VA2 or an active discriminating level VA1 of a lean signal. When the air-fuel ratio sensor is brought into an active state from an inactive state, an air-fuel ratio feedback constant is returned to its original value.

58. 发明专利

JPS63248945A FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS63248945A
公开(公告)日：1988-10-17
申请号：JP8445187
申请日：1987-04-06
申请人： TOYOTA MOTOR CORP
发明人： MATSUOKA HIROKI
IPC分类号： F02D31/00 , F02D41/00 , F02D41/06
摘要： PURPOSE:To avoid unnecessary fuel consumption, in an engine in which fuel for starting is supplied at the time of starting, by controlling the supply of starting fuel so that it is completed at the time when the number of revolutions of the engine at the time of starting has exceeded a stable starting number of revolutions. CONSTITUTION:When an internal combustion engine M1 is started, a fuel supply means is controlled by a starting fuel supply means M2 so as to supply starting fuel. And when a judging means M3 judges that the number of revolutions of the engine at the time of starting has exceeded the starting completion revolutions which have been determined in correspondence with the operating conditions in the vicinity of complete explosion after cranking, the supply of starting fuel is controlled by a fuel gradually decreasing means M4 so that the starting fuel is gradually decreased. And, in the above control device, if it has been judged by a judging means M5 that the number of revolutions of the engine at the time of starting has exceeded a prescribed stable starting number of revolutions, it is so contrived that the starting fuel supply by means of the starting fuel supply means M2 is completed by a fuel completion means M6.

59. 发明专利

JPS62135665A DEVICE FOR CONTROLLING IGNITION TIMING OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS62135665A
公开(公告)日：1987-06-18
申请号：JP27519485
申请日：1985-12-09
申请人： TOYOTA MOTOR CORP
发明人： MATSUOKA HIROKI , ITO YOSHIAKI
IPC分类号： F02P5/15
摘要： PURPOSE:To remove difference in ignition timing between banks by operating the ignition timing of one specified cylinder when operating the ignition timing of the other specified cylinder in an internal combustion engine in which plural cylinders are divided into plural banks. CONSTITUTION:In an internal combustion engine, plural cylinders are arranged being divided into plural banks, plural cam shafts are provided in line with each of the banks to open and close the suction and exhaust valves of each of the cylinders, and the cam shafts are rotated via one crank shaft. In this case, one of the cam shafts is made a reference cam shaft, and whether this reference cam shaft is in a specified reference angle position or not is judged by a means 1. And, when the reference cam shaft comes to the specified refer ence angle position, the ignition timing of a specified cylinder corresponding to the specified reference angle position, is operated by a means 2. At the same time, the ignition timing of the following specified cylinder corresponding to the specified reference angle position is operated by a means 3. After that, ignition timing is controlled according to each of the ignition timing by a means 4.

60. 发明专利

JPS59188044A Fuel injection of internal-combustion engine 失效
标题翻译：燃油喷射内燃机
公开(公告)号：JPS59188044A
公开(公告)日：1984-10-25
申请号：JP6101983
申请日：1983-04-08
申请人： Toyota Motor Corp
发明人： MATSUOKA HIROKI
IPC分类号： F02D41/34 , F02D41/10
CPC分类号： F02D41/10
摘要： PURPOSE:To improve the acceleration response performance by allowing subsidiary injection in which fuel is intermittently jetted-out several times additionally with a small specific cycle up to the time of main injection in correspondence with acceleration, added with the injection carried-out in synchronization with the engine revolution. CONSTITUTION:During engine revolution, an electronic controller 40 takes-in the opening degree of a throttle valve 3 from a throttle sensor 29, and it is judged that an engine is in acceleration state or not, from the amount of variation of the opening degree with time. In case of YES, it is judged that the acceleration is over a prescribed value or not. And in case of YES, subsidiary injection is needed, and the value C of the subsidiary injection is set into a prescribed range of RAM. For example, in case of 6-cylinder engine, subsidiary fuel injection is carried-out in the timing of a crank angle of 30 deg. through crank angle interruption. The period ranging from the start of acceleration to the next main injection is divided into four stages, and each different number of times of injection may be corresponded to these stages.
摘要翻译：目的：为了提高加速度响应性能，通过允许辅助喷射，其中燃料间歇地喷射数次，在与加速度相对应的主喷射时间内具有小的特定循环，添加与喷射同步的喷射发动机革命。构成：在发动机转速期间，电子控制器40从节气门传感器29接收节气门3的开度，并且从发动机的开度变化量判断为发动机处于加速状态随着时间的推移。在“是”的情况下，判断为加速度超过规定值。在“是”的情况下，需要辅助喷射，将辅助喷射的值C设定在RAM的规定范围内。例如，在6缸发动机的情况下，在曲轴角度为30度的时刻进行辅助燃料喷射。通过曲柄角中断。从加速开始到下一个主喷射的时间段分为四个阶段，每个不同的喷射次数可以对应于这些阶段。

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