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81. 发明专利

JPS55164755A ELECTRONICALLY CONTROLLED CARBURETOR 失效
公开(公告)号：JPS55164755A
公开(公告)日：1980-12-22
申请号：JP7232379
申请日：1979-06-11
申请人： HITACHI LTD
发明人： KUROIWA HIROSHI , OOYAMA TAKASHIGE
IPC分类号： F02D43/00 , F02D37/02 , F02M7/00 , F02M17/38
摘要： PURPOSE:To properly control an air-fuel ratio for an engine in a transient operation by storing an output from a suction pressure sensor of the engine, and correcting the air-fuel ratio and ignition timing by using the values obtained from the stored output. CONSTITUTION:A signal from a suction pressure sensor 17 provided to a suction pipe 21 of an engine 1 is input to a decision circuit 26, and is stored. To the circuit 26, signals from an ignition switch 28 and a starter 30 are input through a voltage regulating circuit 29, and the signal from an engine speed sensor 25 is also input through a voltage holding circuit 33. These signals, which are input as measured values, are compared with the values previously stored. A deviatiol between them is used as a correction signal to control an air-fuel ratio control circuit 31 for driving a solenoid valve 14 of an air bleed 10, and a control circuit 32 for adjusting ignition timing.

82. 发明专利

JPS55142952A ELECTRONIC CARBURETOR 失效
公开(公告)号：JPS55142952A
公开(公告)日：1980-11-07
申请号：JP4913479
申请日：1979-04-23
申请人： HITACHI LTD
发明人： OOYAMA TAKASHIGE , KUROIWA HIROSHI
IPC分类号： F02M1/12
摘要： PURPOSE:To compensate the opening of a carburetor's choke valve and improve its starting performance, by making the voltage applied to a valve control heater variable in accordance with signals of air density and temperature. CONSTITUTION:A choke valve 26 of carburetor is interlocked with a bimetal 28 which is fitted close to a heater 29, so that the valve 26 is controllable in accordance with the temperature of the heater 29. The heater 29 is applied with a current in accordance with the density and temperature of atmospheric air, being connected to a current controller 33 for receiving signals from a density-temperature detector 12. A main air blade downstream of a main nozzle 4 is equipped with a starting valve 35 to control the valve 35 in accordance with the signal from the detector 12 for improving the air fuel ratio of mixture from the main nozzle 4.

83. 发明专利

JPS55142941A ELECTRONICALLY CONTROLLED CARBURETOR 失效
公开(公告)号：JPS55142941A
公开(公告)日：1980-11-07
申请号：JP4913579
申请日：1979-04-23
申请人： HITACHI LTD
发明人： OOYAMA TAKASHIGE , KUROIWA HIROSHI
IPC分类号： F02D41/34 , F02D3/00 , F02D35/00 , F02D41/18 , F02M7/12 , F02M69/00
摘要： PURPOSE:To prevent a variation of air-fuel ratio with a simple constitution, by detecting a quantity of air in a bypass passage, and by controlling a gauge valve in compliance with the detection signal. CONSTITUTION:A hot wire probe 26 is arrnged within a bypass 27 for a Venturi 3. amd a gauge valvd 28 is provided, and an amount of air within the bypass 27 is fixed by adjusting a control valve 28, and a change of an intake air quantity is converted in terms of a stroke variation for the control valve 28. In case of an intake air pulsation, a valve rod 31 is provided with a vibration damper, and an excessive vibration of the valve 28 is prevented. The position of the valve rod 31 is converted to a digital signal, and an ignition period is controlled by the said digital signal.

84. 发明专利

JPS55139952A ELECTRONICALLYYCONTROLLED CARBURETOR 失效
公开(公告)号：JPS55139952A
公开(公告)日：1980-11-01
申请号：JP4790579
申请日：1979-04-20
申请人： HITACHI LTD
发明人： OOYAMA TAKASHIGE , KUROIWA HIROSHI
IPC分类号： F02M11/00 , F02M7/00 , F02M7/12 , F02M7/24 , F02M11/02
摘要： PURPOSE:To appropriately adjust the throttle valve on the secondary side by compensating negative pressure rate according to the number of rotation and suction pipe negative pressure at the throttle valve on the secondary side of the multi-stage carburetor which is switching-controlled by venturi negative pressure. CONSTITUTION:A primary side throttle valve 28 is provided in the primary side suction cylinder 26, and a secondary side throttle valve 29 is provided in the secondary side suction cylinder 27. The secondary side throttle valve 29 is mechanically linked with the diaphragm 33 at the back of which is provided with venturi negative pressure from both suction cylinders. Also, a switching valve 32, which is switching- controlled by the control circuit 12 which receives the signals of the number of rotation and suction negative pressure of the engine, is provided in the negative pressure pipe 33 to connect with or shut off atmospheric air.

85. 发明专利

JPS5495833A AIR FUEL RATIO CONTROLLER 失效
公开(公告)号：JPS5495833A
公开(公告)日：1979-07-28
申请号：JP115878
申请日：1978-01-11
申请人： HITACHI LTD
发明人： YAMAUCHI TERUO , MIYAGAWA NOBUAKI , KUROIWA HIROSHI
IPC分类号： F02D41/14 , F02D33/00
摘要： PURPOSE:To improve control reliability and responsibility by adding two signals of output from an oxygen sensor one of which is reversed and delayed. CONSTITUTION:Those output signals of an oxygen sensor 3 detecting the oxygen density in exhaust gas of an engine 1 and of a thermosensor 4 detecting the atmospheric temperature near it are put into an electrically processing circuit 5, which devides the output signal of the oxygen sensor 3 into two. One of the signals is reversed and the phase is delayed according to the output signal of the thermo- sensor 4. After that, the result is added to the other signal to gain a rising output wave. After receiving a signal equal to the detecting signal added to a fuel supply system 2, a phase discriminator 6 compares the phase of the modulation output from the electrically precessing circuit 5 with the phase of the detecting signal. The flow rate of the fuel supply system 2 may depend on the voltage difference to increase or decrease so that the air-fuel-ratio of mixture suctioned by the engine 1 is currently controlled to near the theory air-fuel-ratio. The temperature characteristic and the frequency responsibility of the oxygen sensor 3 will not have an effect on the control.

86. 发明专利

JPS5423837A SLOW FUEL SUPPLY SYSTEM IN CARBURETOR 失效
公开(公告)号：JPS5423837A
公开(公告)日：1979-02-22
申请号：JP8801977
申请日：1977-07-21
申请人： HITACHI LTD
发明人： KUROIWA HIROSHI , OOYAMA TAKASHIGE
IPC分类号： F02M3/12 , F02M7/00
摘要： PURPOSE:To obtain a slow fuel supply system devised to supply fuel uniformly atomized steadily.

87. 发明专利

JPS5279137A AIR FUEL RATIO CONTROLLER FOR ENGINE 失效
公开(公告)号：JPS5279137A
公开(公告)日：1977-07-04
申请号：JP15624975
申请日：1975-12-25
申请人： HITACHI LTD
发明人： KUROIWA HIROSHI , OOYAMA TAKASHIGE
IPC分类号： F02D41/14 , F02D33/00 , F02D41/04 , F02D41/08 , F02M7/00 , F02M7/24
摘要： PURPOSE:To lessen the change of the air fuel ratio of mixture by disconnecting control at the time of low speed operatiion such as idling or so in the system to control the air fuel ratio by detecting the state of exhaust gas and using the output obtained.

88. 发明专利

JPS5240231A CARBURETER 失效
公开(公告)号：JPS5240231A
公开(公告)日：1977-03-29
申请号：JP11473875
申请日：1975-09-25
申请人： HITACHI LTD
发明人： TAKAZUKA HIROBUMI , KUROIWA HIROSHI
IPC分类号： F02M19/03 , F02M19/06
摘要： PURPOSE:This device improves the follow-up property of fuel in case of re-acceleration after engine retardation.

89. 发明专利

JPS51120324A CARBURETOR WITH COCK TYPE THROTTLE VALVE 失效
公开(公告)号：JPS51120324A
公开(公告)日：1976-10-21
申请号：JP4430375
申请日：1975-04-14
申请人： HITACHI LTD
发明人： KUROIWA HIROSHI , KOUNO TAKASHIGE , USUYA MINEO
IPC分类号： F02M3/14 , F02M9/08
摘要： PURPOSE:A characteristic of rate of flow of fuel is improved by providing a bypass hole above the center of the axis of the throttle valve.

90. 发明专利

JPS5146620A 失效
公开(公告)号：JPS5146620A
公开(公告)日：1976-04-21
申请号：JP11919574
申请日：1974-10-18
申请人： HITACHI LTD
发明人： KUROIWA HIROSHI , TAKAMARU TAKESHI
IPC分类号： F02M7/23 , F02M7/10 , F02M7/24

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