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公开(公告)号：US3968425A
公开(公告)日：1976-07-06
申请号：US591951
申请日：1975-06-30
CPC分类号： F02P17/02
摘要： Apparatus for and method of measuring the ignition timing of an internal combustion engine while cranking the engine with the starter motor, and with the ignition inhibited. Starter motor current fluctuations are examined to determine the times of current peaks due to compression in individual cylinders. Means coupled to the ignition circuit determines the times of points openings. A time difference signal representing the lead or lag of the ignition relative to the starter current peaks is generated. The lead or lag is then related to the time of top dead center in terms of degrees.
摘要翻译： 用起动电动机起动发动机并且抑制点火时测量内燃机的点火正时的装置和方法。 检查起动电机电流波动以确定由于各个气缸中的压缩引起的电流峰值的时间。 联接到点火电路的装置确定点开口的次数。 产生表示点火相对起动电流峰值的引导或滞后的时差信号。 然后，领先或滞后与上死点的时间相关。
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公开(公告)号：US3972230A
公开(公告)日：1976-08-03
申请号：US588385
申请日：1975-06-19
摘要： An apparatus for, and method of, detecting the uneven operation of the individual cylinders in an internal combustion engine, and for diagnosing the cause thereof. The engine is operated at any convenient idle speed. Power cycle time periods between successive ignition times are measured, the deceleration rates between successive time periods are then computed, and finally the average deceleration rates for the respective cylinders are computed. Misfires occurring randomly in cylinders are detected when individual deceleration rates exceed the average deceleration rate for the corresponding cylinder by a predetermined limit amount. Repeated malfunctioning in an individual cylinder is detected when the average deceleration rate for the weakest cylinder exceeds that for the strongest cylinder by a predetermined limit amount.
摘要翻译： 用于检测内燃机中的各个气缸的不均匀运行并用于诊断其原因的装置和方法。 发动机以任何方便的怠速运转。 测量连续点火时间之间的动力循环时间，然后计算连续时间段之间的减速率，最后计算各气缸的平均减速率。 当单个减速率超过相应气缸的平均减速度预定极限量时，检测气缸中随机发生的失火。 当最弱的气缸的平均减速度超过最强气缸的平均减速度预定的极限量时，检测到单个气缸中的重复故障。
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公开(公告)号：US3964301A
公开(公告)日：1976-06-22
申请号：US516503
申请日：1974-10-21
CPC分类号： G01L3/242 , G01M15/044 , F02D2200/1006
摘要： Apparatus for and method of determining the brake torque and horsepower of an internal combustion engine without connecting an external load. Means are provided to operate the engine at full throttle and with all but one out of n of successive ignitions inhibited, the value n being selected so that the engine operates with just enough power to equal the frictional load of the engine and maintain an equilibrium speed at the upper end of the engine speed range. The engine is then operated momentarily with full ignition, and then with no ignition, during which a determination is made of the rate at which the engine decelerates through the equilibrium speed. The deceleration rate is multiplied by the known inertia of the engine to determine the friction torque of the engine at the equilibrium speed. The friction torque is multiplied by n - 1 to predict the brake torque of the engine at the equilibrium speed when operated normally with external load. Horsepower is determined by multiplying torque and speed.
摘要翻译： 在不连接外部负载的情况下确定内燃机的制动扭矩和马力的装置和方法。 提供了用于在全油门处操作发动机的装置，并且除了连续点火中的一个之外，除了一个之外，所有值都被选择，使得发动机以刚好足够的功率运行以等于发动机的摩擦负荷并保持平衡速度 在发动机转速范围的上端。 然后，发动机在完全点火时立即运行，然后在没有点火的情况下运行，在此期间确定发动机通过平衡速度减速的速率。 减速率乘以发动机的已知惯性，以平衡速度确定发动机的摩擦转矩。 摩擦转矩乘以n-1，以在外部负载下正常运行时以平衡速度预测发动机的制动转矩。 功率由扭矩和速度乘以确定。
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公开(公告)号：US4036049A
公开(公告)日：1977-07-19
申请号：US700650
申请日：1976-06-28
申请人： Richard Eric Hanson
发明人： Richard Eric Hanson
CPC分类号： G01M1/10
摘要： A method for determining the rotational moment of inertia of an engine, crising the steps of carrying out engine deceleration tests, first with the engine unloaded and later with the engine sufficiently loaded to provide a recordable difference in deceleration rate (or elapsed time). Moment of inertia is determined as the numerical value of the added load divided by the difference in deceleration rates, before and after the load is applied.
摘要翻译： 一种用于确定发动机的旋转惯性矩的方法，包括以下步骤：执行发动机减速试验，首先在发动机卸载后，随后发动机充分加载以提供减速率（或经过时间）的可记录差。 惯性矩确定为加载负载的数值除以减速率的差异，在施加负载之前和之后。
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公开(公告)号：US3942365A
公开(公告)日：1976-03-09
申请号：US569857
申请日：1975-04-21
CPC分类号： G01M15/044 , F02B2075/027
摘要： Means for and method of testing the power of an internal combustion engine. A tachometer means coupled to the engine generates one electrical pulse per engine cycle of the engine. While the engine is full-throttle accelerated, a computer means measures the time periods between successive pulses, each time period constituting the reciprocal of the average engine speed during the particular engine cycle. One-half of the time period corresponding with a low speed and one-half of the time period corresponding with a high speed are added to the intermediate time periods to determine an acceleration time period which is a measure of engine power. The acceleration rate is determined by subtracting the reciprocal of the time period corresponding with the low speed from the reciprocal of the time period corresponding with the high speed to determine the speed change, and dividing the speed change by the acceleration time period. Brake torque is determined by multiplying the acceleration rate by the known inertia of the engine. The engine is then shut off and the deceleration rate is determined and is multiplied by the known inertia of the engine to determine the friction torque of the engine. The brake torque is added to the friction torque to determine the indicated (total) torque of the engine.
摘要翻译： 用于测试内燃机功率的方法和方法。 耦合到发动机的转速表装置在发动机的每个发动机循环中产生一个电脉冲。 当发动机全速加速时，计算机装置测量连续脉冲之间的时间周期，每个时间段构成特定发动机循环期间平均发动机转速的倒数。 将与对应于高速的低速和半个时间段对应的时间段的一半添加到中间时间段以确定作为发动机功率的量度的加速时间段。 通过从对应于高速的时间段的倒数中减去与低速对应的时间段的倒数来确定速度变化并将速度变化除以加速时间来确定加速度。 制动转矩通过将加速度乘以发动机的已知惯性来确定。 然后关闭发动机并确定减速率并乘以发动机的已知惯性以确定发动机的摩擦转矩。 将制动转矩加到摩擦转矩上，以确定发动机的指示（总）转矩。
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6.发明授权
公开(公告)号：US3994160A
公开(公告)日：1976-11-30
申请号：US569859
申请日：1975-04-21
申请人： Richard Eric Hanson
发明人： Richard Eric Hanson
CPC分类号： G01M15/044 , F02B3/06
摘要： The full-power condition of an internal combustion diesel engine is tested by an acceleration burst test in which the engine initially operated at idle speed is suddenly given full throttle and caused to accelerate to a maximum governed speed. A tachometer means coupled to the engine produces one electrical pulse per engine cycle. The time taken in going between a predetermined low speed and a predetermined high speed is accurately determined, despite irregularities in the engine, by adding a portion determined by interpolation in the time period between pulses at the low speed, and a portion determined by interpolation in the time period between pulses at the high speed, to the intermediate time periods.
摘要翻译： 内燃柴油机的全功率状态通过加速爆破试验进行测试，其中发动机最初在怠速运转时被突然给予全速，并且加速到最大控制速度。 耦合到发动机的转速表装置在每个发动机循环中产生一个电脉冲。 通过在低速脉冲之间的时间段内添加由内插确定的部分和通过内插确定的部分，尽可能地准确地确定在预定低速和预定高速之间进行的时间， 在高速脉冲之间的时间段到中间时间段。
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公开(公告)号：US3952586A
公开(公告)日：1976-04-27
申请号：US588386
申请日：1975-06-19
CPC分类号： G01L23/085
摘要： Satisfactory or unsatisfactory engine compression is diagnosed by comparing the amplitude of the starter motor current, when cranking an engine having its ignition inhibited, with a reference value. The reference value is adjusted in accordance with the intake manifold absolute pressure, as determined from measurements during the test of ambient pressure and intake manifold vacuum.
摘要翻译： 通过比较起动电动机电流的振幅，当启动其点火禁止的发动机与参考值来诊断发动机压缩令人满意或不令人满意时。 根据在环境压力和进气歧管真空试验期间的测量值确定的进气歧管绝对压力来调整参考值。
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