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    • 1. 发明授权
    • Apparatus and method for controlling air-to-fuel ratio for an internal
combustion engine
    • 用于控制内燃机的空燃比的装置和方法
    • US4566419A
    • 1986-01-28
    • US640987
    • 1984-08-15
    • Masakazu NinomiyaHideya FujisawaNorio OmoriAtsushi Suzuki
    • Masakazu NinomiyaHideya FujisawaNorio OmoriAtsushi Suzuki
    • F02D41/14F02B3/00G01N27/58
    • F02D41/1476
    • A gas sensor of constant-current type is used to detect a gas component in exhaust gases from an internal combustion engine so as to perform feedback control of air/fuel ratio of an air-fuel mixture supplied to the engine. In order to detect an air/fuel ratio which is richer than a stoichiometric value, a voltage applied to the gas sensor is set to a high value so that the gas sensor does not exhibit a constant-current characteristic. In the case it is desired to detect an air/fuel ratio which is either richer or leaner than the stoichiometric value, the voltage may be changed between the high value and a lower value at which the gas sensor exhibits a constant-current characteristic. Engine parameters are detected to determine whether the engine requires a rich mixture or a lean mixture, and the voltage may be changed as the result of such determination. An output current of the gas sensor is detected to ascertain air/fuel ratio so that air/fuel ratio is controlled to a desired value suitable for engine operating condition.
    • 使用恒流型气体传感器来检测来自内燃机的废气中的气体成分,以对供给发动机的空气 - 燃料混合物的空气/燃料比进行反馈控制。 为了检测比化学计量值更浓的空气/燃料比,施加到气体传感器的电压被设定为高值,使得气体传感器不呈现恒定电流特性。 在需要检测比化学计量值更浓或更稀的空燃比的情况下,可以在气体传感器呈现恒定电流特性的高值和较低值之间改变电压。 检测发动机参数以确定发动机是否需要富混合物或稀混合物,并且可以作为这种确定的结果而改变电压。 检测气体传感器的输出电流以确定空气/燃料比,使得空气/燃料比被控制到适合于发动机运行状态的期望值。
    • 6. 发明授权
    • Control system for an engine having an air intake passage
    • 具有进气通道的发动机的控制系统
    • US4713765A
    • 1987-12-15
    • US704032
    • 1985-02-21
    • Tomoaki AbeHideya FujisawaNorio OmoriMasumi KinugawaKatsunori ItoSusumu AkiyamaTiaki MizunoToshitaka Yamada
    • Tomoaki AbeHideya FujisawaNorio OmoriMasumi KinugawaKatsunori ItoSusumu AkiyamaTiaki MizunoToshitaka Yamada
    • F02D41/18F02M51/00G01F1/68
    • F02D41/187
    • A control system for an engine has a temperature sensitive element as part of a device for measuring the air flow in an air intake manifold to the engine. Further, a first pulse signal is generated, corresponding to the rotation of the engine, for controlling the setting of a flip-flop. A transistor is conducted in the set state of the flip-flop to supply a heating electric current to the element. The element supplied with the current is raised to the temperature that corresponds to the air flow in the manifold. When the temperature of the element is raised until the specified temperature difference to the air temperature (measured by a sub temperature sensitive element) is set, the temperature difference is detected by a comparator, and the flip-flop is reset by the detection signal. A pulse-shaped signal corresponding to the set state of the flip-flop is produced as a measurement output signal, supplied as one detection signal of the operating state of the engine to an engine control unit, and the current to the element is controlled to be supplied by the pulse-shaped signal.
    • 用于发动机的控制系统具有温度敏感元件,作为用于测量到发动机的进气歧管中的气流的装置的一部分。 此外,产生与发动机的旋转对应的第一脉冲信号,用于控制触发器的设定。 晶体管在触发器的置位状态下被导通,以向元件提供加热电流。 提供电流的元件升高到对应于歧管中气流的温度。 当元件的温度升高直到与空气温度(由次级温度敏感元件测量)的指定温度差设定为止时,通过比较器检测温度差,并且触发器由检测信号复位。 产生与触发器的设定状态相对应的脉冲状信号作为测量输出信号,作为发动机的运行状态的一个检测信号提供给发动机控制单元,并且将对该元件的电流控制为 由脉冲信号提供。
    • 7. 发明授权
    • Engine air intake control system
    • 发动机进气控制系统
    • US4237838A
    • 1980-12-09
    • US1353
    • 1979-01-04
    • Masumi KinugawaHideya FujisawaNorio OmoriMotoharu Sueishi
    • Masumi KinugawaHideya FujisawaNorio OmoriMotoharu Sueishi
    • F02D41/34F02D9/02F02D31/00F02D41/12F02D41/16F02D41/18F02M69/32F02D1/04F02B75/10
    • F02D31/005F02D41/182F02M69/32Y02T10/42
    • A system for controlling the amount of air taken in by an engine comprises an air duct tube bypassing a throttle valve of an intake tube for taking in air supplied to an automobile engine, a plurality of valves for regulating the amount of air passing through the air duct tube, and control device therefor. The amount of air in the bypass is controlled in accordance with the temperature and number of revolutions of the engine and the air intake pressure downstream of the throttle valve. During the idling of the engine, the air intake control system generates a signal representing the standard engine idling revolutions in accordance with the engine temperature, compares the actual engine revolutions with a reference, and regulates the amount of air flowing in the bypass by use of the results of a comparison, thus rendering the actual engine revolutions identical to the reference. During the loaded engine operation, by contrast, the amount of bypass air is so controlled that the air intake pressure downstream of the throttle valve is maintained at predetermined constant value.
    • 用于控制由发动机吸入的空气量的系统包括绕过用于吸入供应到汽车发动机的空气的进气管的节流阀的空气管道管,用于调节通过空气的空气量的多个阀 管道管及其控制装置。 旁路中的空气量根据发动机的转速和节气门下游的进气压力进行控制。 在发动机怠速期间,进气控制系统根据发动机温度产生表示标准发动机怠速转数的信号,将实际发动机转数与参考值进行比较,并且通过使用发动机温度调节在旁路中流动的空气量 比较结果,从而使实际的发动机转数与参考相同。 相反,在负载发动机运转期间,旁路空气的量受到控制,使得节流阀下游的进气压力保持在预定的恒定值。