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31. 发明专利

JPH04339172A MULTICYLINDER INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH04339172A
公开(公告)日：1992-11-26
申请号：JP10744091
申请日：1991-05-13
申请人： TOYOTA MOTOR CORP
发明人： MATSUURA KOZO , YOSHIMATSU AKIO
IPC分类号： F02B29/08 , F02M69/04 , F02M69/08
摘要： PURPOSE:To favorably atomize fuel by assist air in the multicylinder internal combustion engine of which intake air quantity is controlled by intake control valves by supplying assist air to fuel injection valves without additionally providing other devices. CONSTITUTION:In a first cylinder 1, an intake control valve 27 is opened before opening of an intake valve 5, and the intake control valve 27 is closed after the time of intake bottom dead center and before closing of the intake valve 5. Hereby, relatively high positive pressure is kept in a pressure keeping space 31 between the intake valve 5 and the intake control valve 27. This pressure keeping space 31 is connected to a fuel injection valve 24 of a second cylinder 2, and at injecting fuel with the second fuel injection valve 24, air assist is performed by positive pressure air in the pressure keeping space 31. Also as to the other cylinder, the pressure keeping space is connected to the fuel injection valve to inject fuel during keeping positive pressure in the pressure keeping space.

32. 发明专利

JPH0441965A INTAKE DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0441965A
公开(公告)日：1992-02-12
申请号：JP14851690
申请日：1990-06-08
申请人： TOYOTA MOTOR CORP
发明人： MATSUURA KOZO , MORI KENJI , KASHIWAKURA TOSHIMI
IPC分类号： F02B29/08 , F02D33/00 , F02D41/12 , F02D45/00 , F02M23/04
摘要： PURPOSE:To minimize the shock due to deceleration in decelerating an enigine along with the increased braking effect by gradually decreasing the opening time of a control valve for opening/closing a sub-intake valve adapted to communicate intake pipe portions on the upper and lower sides of a cut-off valve in a specified decelerating state of the engine, and full opening the control valve after an elapse of the predetermined time. CONSTITUTION:An intake cylinder 9 of each cylinder is provided with a cut-off valve 11 which serves as a throttle valve to continuously adjust the flow rate of an intake air flowing from the inside of a serging tank 10 to an intake port. Each cylinder is provided with sub-intake pipe 14 which forms such a bypass intake passage as communicating the intake port 14 with the serging tank 10 while bypassing the cut-off valve 11. A control valve 15 is provided in the midway of the bypass intake passage for intermitting an air flow therethrough. The control valve 15 is operated to be opened/closed by an electronic control unit(ECU) 16 based on detetced signals from an accelerator opening sensor 25. In this case, when the specified decelerating state is detected, the opening time of the control valve 15 is decreased in the specified manner, thereby controlling the control valve 15 to be full opened after an elapse of the predermined time.

33. 发明专利

JPH03199651A AIR-FUEL RATIO CONTROLLER OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH03199651A
公开(公告)日：1991-08-30
申请号：JP33766289
申请日：1989-12-26
申请人： TOYOTA MOTOR CORP
发明人： MATSUURA KOZO
IPC分类号： F02D41/22 , F02D23/00
摘要： PURPOSE:To accurately perform air-fuel ratio control based on exhaust temperature by grasping cooling loss through detection of heat flow speed of gas which flows on a partial are inside a cylinder head, and estimating the exhaust temperature. CONSTITUTION:Exhaust gas temperature is influenced by heat loss of an internal combustion engine 11 and any cooling loss can be grasped by heat flux of gas which flows on a partial area inside a cylinder. Thereby an engine operation condition is detected by an operation condition detection means 13, the cooling loss is obtained from the heat flux measured by a heat flux detection means 12, and the exhaust temperature is estimated by a calculation means 14. In a comparison means 15, the estimated exhaust temperature is compared with the exhaust temperature preliminarily set. When the exhaust temperature exceeds at least the allowable value, an air-fuel ratio is controlled by a control means 16 to the richer side than that at previous air-fuel control. The air-fuel ratio control based on the exhaust temperature is accurately performed, and it can be prevented that the exhaust temperature is more than the allowable value.

34. 发明专利

JPH02136528A EXHAUST GAS TEMPERATURE CONTROLLER DEPENDING ON AIR-FUEL RATIO CONTROL ON INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH02136528A
公开(公告)日：1990-05-25
申请号：JP28829688
申请日：1988-11-15
申请人： TOYOTA MOTOR CORP
发明人： MATSUURA KOZO , KATO KENJI
IPC分类号： F02D41/02 , F02D23/00 , F02D41/04 , F02D41/14 , F02D41/22
摘要： PURPOSE:To control an air-fuel ratio without using an exhaust gas temperature detector as well as to keep off any thermal breakdown in an exhaust system by controlling the air-fuel ratio to the rich side according to the compared result between actual temperature around a combustion chamber and estimated temperature around the combustion chamber being set from engine load and speed. CONSTITUTION:In a control circuit inputting each output signal out of an air flow-meter 10, a knocking sensor 36, a head temperature sensor 39, a turning angle sensor 48, a cooling temperature sensor 38 or the like at time of vehicle running, a control signal is outputted, and an igniter 44 and a fuel injection valve 26 are controlled. In addition, an air-fuel ratio found on the basis of a driving state is controlled to the rich side according to exhaust gas temperature whereby this exhaust gas temperature is kept to be less than the specified value. Then, at time of this exhaust gas temperature control, actual temperature around a combustion chamber by the head temperature sensor 39 is compared with estimated temperature around the combustion chamber being set according to engine load and speed, and when a side of the actual temperature is higher than the estimated one, the air-fuel ratio should be controlled to the rich side.

35. 发明专利

JPH0242122A INTAKE DEVICE FOR INTERNAL COMBUSTION ENGINE WITH TURBOCHARGER 失效
公开(公告)号：JPH0242122A
公开(公告)日：1990-02-13
申请号：JP19283388
申请日：1988-08-03
申请人： TOYOTA MOTOR CORP
发明人： WATANABE YOSHIMASA , MATSUURA KOZO , KANDA MUTSUMI
IPC分类号： F02B31/02 , F02F1/42 , F02M35/10 , F02M35/108
摘要： PURPOSE:To prevent the lowering of output torque and output in particular in a low load region by providing the first intake port having a straight state and the second intake port for swirl generation in the cylinder longitudinal direction, and interposing the intake control valve closed in the low load region in the second port. CONSTITUTION:The first intake port 3 having a straight state, the second intake port 4 for swirl generation, and two exhaust ports 5 are formed to every cylinder of an engine, a fuel injection valve 6 is provided to the port 3, and also the intake control valve 10 closed at the time of low load is interposed in the port 4. A recessed part 17 is formed on an intake port upper wall 4a at the vicinity of an intake valve 14 in the port 4, and the intake air flowing along the wall 4a is made to be changed to the flow along an intake port lower wall 4b. This enables the cylinder longitudinal direction swirl to be generative in which the intake air introduced into a fuel chamber 16 descends along a cylinder peripheral wall surface 2a, and reflected with the top surface 18a of a piston 18 to ascend.

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