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公开(公告)号：US4736720A
公开(公告)日：1988-04-12
申请号：US875646
申请日：1986-06-18
CPC分类号： F02M3/07 , F02D31/003
摘要： An idling speed control system for controlling idling rotational speed of an internal combustion engine. A vacuum-operated actuator having a diaphragm defining a vacuum chamber controls opening and closing of a throttle valve in response to first and second control pressures supplied from a change-over control valve to the vacuum chamber. An electronic control unit generates, in response to an on-off control pulse signal having a period corresponding to rotational speed of the engine, one of on-period and off-period of the on-off control pulse signal having a predetermined constant value, and supplies the change-over control valve with the control pulse signal. Preferably, a detector is connected to the electronic control unit for detecting a change in the magnitude of a load on the engine and supplying the electronic control unit with an output signal indicative of the detected change in the load magnitude. The electronic control unit is responsive to the output signal for setting the pulse duration of the on-off control pulse signal to a value different from the above predetermined constant pulse duration. A delay valve provided across a passage connecting between the vacuum chamber and the change-over control valve sets the feeding speed of the first control pressure and that of the second control pressure fed through the passage to different values from each other.
摘要翻译： 一种用于控制内燃机的空转转速的怠速控制系统。 具有限定真空室的隔膜的真空操作致动器响应于从转换控制阀提供给真空室的第一和第二控制压力来控制节流阀的打开和关闭。 电子控制单元响应于具有对应于发动机的转速的周期的开 - 关控制脉冲信号，产生具有预定常数值的开 - 关控制脉冲信号的导通周期和非周期中的一个， 并向转换控制阀提供控制脉冲信号。 优选地，检测器连接到电子控制单元，用于检测发动机上的负载的大小的变化，并向电子控制单元提供指示检测到的负载大小变化的输出信号。 电子控制单元响应输出信号，将开关控制脉冲信号的脉冲持续时间设定为与上述预定恒定脉冲持续时间不同的值。 设置在连接真空室和转换控制阀之间的通道的延迟阀将第一控制压力的进给速度和通过通道供给的第二控制压力的进给速度设定为彼此不同的值。
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公开(公告)号：US4753202A
公开(公告)日：1988-06-28
申请号：US880782
申请日：1986-07-01
CPC分类号： F02D31/004
摘要： An idling speed control system for controlling idling rotational speed of an internal combustion engine. A vacuum-operated actuator having a diaphragm defining a vacuum chamber controls opening and closing of a throttle valve in response to pressures suppliedfrom a change-over control valve to the vacuum chamber. The change-over control valve selectively supplies the vacuum chamber with a first control pressure for opening the throttle valve and a second control pressure for closing same. An electronic control unit generates an on-off control pulse signal having a pulse repetition period corresponding to rotational speed of the engine, one of on-period or off-period of the on-off control pulse signal having a predetermined constant value, and supplies the change-over control valve with the on-off control pulse signal. The electronic control unit is adapted to gradually increase the on-off pulse control signal when the engine rotational speed is in a first region higher than a predetermined idling rotational speed region, and gradually decrease the one of the on-period and off-period of the on-off control pulse signal when the rotational speed is in a second region lower than the predetermined idling rotational speed region.
摘要翻译： 一种用于控制内燃机的空转转速的怠速控制系统。 具有限定真空室的隔膜的真空操作致动器响应于从转换控制阀提供给真空室的压力来控制节流阀的打开和关闭。 切换控制阀选择性地向真空室供给用于打开节流阀的第一控制压力和用于关闭节气门的第二控制压力。 电子控制单元生成具有对应于发动机的转速的脉冲重复周期的开关控制脉冲信号，具有预定常数值的开 - 关控制脉冲信号的导通周期或截止周期之一，并且供给 切换控制阀具有开关控制脉冲信号。 电子控制单元适于在发动机转速处于高于预定怠速转速区域的第一区域内时逐渐增加开 - 关脉冲控制信号，并逐渐减小开/关脉冲控制信号 当旋转速度处于比预定空转转速区域低的第二区域时的开关控制脉冲信号。
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公开(公告)号：US4750461A
公开(公告)日：1988-06-14
申请号：US880727
申请日：1986-07-01
CPC分类号： F02D31/005 , F02M3/07
摘要： An idling speed control system for controlling idling rotational speed of an internal combustion engine. A vacuum-operated actuator having a diaphragm defining a vacuum chamber controls opening and closing of a throttle valve in an intake passage of the engine in response to first and second control pressures supplied from a change-over control valve to the vacuum chamber. An electronic control unit generates an on-off control pulse signal having a period corresponding to the rotational speed of the engine, one of on-period and off-period of the on-off control pulse signal having a predetermined constant value, and supplies the change-over control valve with the on-off control pulse signal, in response to which the change-over control valve supplies the vacuum chamber of the vacuum-operated actuator, selectively, with the first control pressure and the second control pressure, determines the engine rotational speed and a rate of decrease in the engine rotational speed, and halts the control for a predetermined period of time when the determined engine rotational speed falls within a predetermined range and at the same time the determined rate of decrease in the engine rotational speeds falls within a predetermined range.
摘要翻译： 一种用于控制内燃机的空转转速的怠速控制系统。 具有限定真空室的隔膜的真空操作致动器响应于从转换控制阀提供给真空室的第一和第二控制压力来控制发动机的进气通道中的节流阀的打开和关闭。 电子控制单元生成具有与发动机的转速相对应的周期的开 - 关控制脉冲信号，其中开通控制脉冲信号的导通周期和截止周期之一具有预定的常数值，并且将 切换控制阀具有开 - 关控制脉冲信号，响应于此，转换控制阀选择性地以第一控制压力和第二控制压力供应真空操作致动器的真空室，确定 发动机旋转速度和发动机转速的降低率，并且当所确定的发动机转速落在预定范围内时，将控制停止预定时间段，同时确定发动机转速的确定的减速率 落在预定范围内。
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公开(公告)号：US4693220A
公开(公告)日：1987-09-15
申请号：US880788
申请日：1986-07-01
CPC分类号： F02D31/003 , F02M3/07
摘要： A vacuum-operated actuator controls opening and closing of a throttle valve in an intake passage of an internal combustion engine in response to pressure in a vacuum chamber thereof. A change-over control valve supplies the vacuum chamber, selectively, with first and second control pressures for opening and closing the throttle valve, respectively. An electronic control unit controls the engine idling rotational speed by generating an on-off control pulse signal having a period corresponding to the engine rotational speed, and supplying the change-over control valve with the on-off control pulse signal to cause same to supply the vacuum chamber with the first or second control pressure. The electronic control unit determines the engine rotational speed and a rate of decrease in the engine rotational speed, and halts the idling speed control for a predetermined period of time when the determined engine rotational speed falls within a predetermined range and at the same time the determined rate of decrease falls within a predetermined range. A valve opening-correcting device corrects the throttle valve opening to a larger opening in response to at least one predetermined external load applied on the engine. The electronic control unit actuates the valve opening-correcting device to increase the throttle valve opening which is determined by the change-over control valve in response to the on-off control pulse signal.
摘要翻译： 真空操作的致动器响应于其真空室中的压力来控制内燃机的进气通道中的节流阀的打开和关闭。 切换控制阀选择性地为真空室提供用于打开和关闭节流阀的第一和第二控制压力。 电子控制单元通过产生具有与发动机转速相对应的周期的开 - 关控制脉冲信号来控制发动机怠速转速，并向切换控制阀供给开 - 关控制脉冲信号， 具有第一或第二控制压力的真空室。 电子控制单元确定发动机转速和发动机转速的降低率，并且当所确定的发动机转速落在预定范围内并且同时确定时，将空转速度控制停止预定时间段 降低率落在预定范围内。 响应于施加在发动机上的至少一个预定的外部负载，阀门打开校正装置将节气门开度校正到更大的开度。 电子控制单元响应于开关控制脉冲信号致动阀打开校正装置以增加由转换控制阀确定的节气门开度。
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公开(公告)号：US4774920A
公开(公告)日：1988-10-04
申请号：US880686
申请日：1986-07-01
CPC分类号： F02D31/003
摘要： An idling speed control system for controlling idling rotational speed of an internal combustion engine. A vacuum-operated actuator having a diaphragm defining a vacuum chamber controls opening and closing of a throttle valve in response to pressures supplied from a change-over control valve to the vacuum chamber. The change-over control valve selectively supplies the vacuum chamber with a first control pressure for opening the throttle valve and a second control pressure for closing same. An electronic control unit generates an on-off control pulse signal having a pulse repetition period corresponding to rotational speed of the engine, one of on-period or off-period of the on-off control pulse signal having a predetermined constant value, and supplies the change-over control valve with the on-off control pulse signal. A valve opening-correcting device is operatively connected to the throttle valve and responsive to at least one predetermined external load applied on the engine for correcting to a larger opening the opening of the throttle valve which is determined by the change-over control valve in response to the on-off control pulse signal.
摘要翻译： 一种用于控制内燃机的空转转速的怠速控制系统。 具有限定真空室的隔膜的真空操作致动器响应于从转换控制阀提供给真空室的压力来控制节流阀的打开和关闭。 切换控制阀选择性地向真空室供给用于打开节流阀的第一控制压力和用于关闭节气门的第二控制压力。 电子控制单元生成具有对应于发动机的转速的脉冲重复周期的开关控制脉冲信号，具有预定常数值的开 - 关控制脉冲信号的导通周期或截止周期之一，并且供给 切换控制阀具有开关控制脉冲信号。 阀开启校正装置可操作地连接到节流阀，并且响应于施加在发动机上的至少一个预定的外部负载，用于校正由转换控制阀响应地确定的节流阀的开度较大的开度 到开关控制脉冲信号。
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公开(公告)号：US4495904A
公开(公告)日：1985-01-29
申请号：US429623
申请日：1982-09-30
CPC分类号： F02N19/001 , F02D41/065 , Y10S261/67
摘要： A solenoid operated cut valve controls flow through a vent passage leading from a float chamber for a carburetor for an internal combustion engine. A normally closed switch opens in response to high temperature of the engine, and a normally closed timer switch opens at the start of cranking and closes again after a predetermined time of cranking. The switches are connected to the solenoid to prevent increase in pressure within the float chamber from delivering an excessive amount of fuel to the air intake passage of the engine. In a modification, a switch responsive to vacuum intensity in the intake passage is included in the solenoid circuit to facilitate acceleration of the engine after a hot start.
摘要翻译： 电磁操作的切断阀控制流过从用于内燃机的化油器的浮子室引出的排气通道的流动。 常闭开关响应于发动机的高温而打开，并且常开的定时开关在起动开始时打开，并且在预定的起动时间之后再次关闭。 开关连接到螺线管，以防止浮子室内的压力升高，从而将过量的燃料输送到发动机的进气通道。 在一个变型中，一个响应进气通道中的真空强度的开关包括在螺线管回路中，以便在热启动之后促进发动机的加速。
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