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公开(公告)号：US4094191A
公开(公告)日：1978-06-13
申请号：US781095
申请日：1977-03-25
CPC分类号： G01M13/00
摘要： A single pressure transducer tapped into the fuel system of an engine, at a point to be responsive to the pressure of the fuel operating against the pressure regulating bypass valve of the fuel system, is used to measure fuel pressure at low idle speed and at high idle speed of the engine; the two pressures when compared against normal pressure can determine bypass valve condition since lower than normal pressure at low idle speed in combination with normal pressure at high idle speed is an indication of a bypass valve which is stuck in the open position, and higher than normal pressure at high idle speed is indication of a bypass valve which is stuck in the closed position. The test can also discern other faults since a lower than normal pressure at high idle speed in combination with a lower than normal pressure at low idle speed is indicative of a bad pump. And, a normal pressure at low idle speed and a lower than normal pressure at high idle speed together are indicative of a filter or other restriction in the line. An exemplary process for making the fuel pressure measurements at two different speeds and a simple illustration of diagnostic analysis of the results thereof are disclosed. Since excessive high idle pressure resulting from the bypass valve being stuck in the closed position will exceed any normal pressure reduction from line restrictions (usually due to dirty filters), even combined faults can be isolated, one at a time.
摘要翻译： 用于在发动机的燃料系统中的单个压力传感器用于测量燃料系统的压力调节旁通阀操作的燃料的压力，以便在低怠速和高温时测量燃料压力 发动机怠速; 与正常压力相比，两个压力可以确定旁通阀状态，因为低怠速下的常压与高怠速时的常压组合是指示处于打开位置的旁通阀，并高于正常 高怠速时的压力表明旁路阀被卡在关闭位置。 该测试还可以辨别其他故障，因为在低怠速下的低于正常压力的低怠速下的低于正常压力的低表示是不良的泵。 而且，低怠速时的正常压力和低怠速下的正常压力一起表示过滤器或其他限制。 公开了以两种不同速度进行燃料压力测量的示例性过程，并且其结果的诊断分析的简单说明。 由于旁路阀所引起的过高的怠速压力将停留在关闭位置，因此超过了线路限制（通常由于脏过滤器）导致的任何正常的压力降低，甚至可以隔离一个组合故障。
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2.发明授权
公开(公告)号：US4064746A
公开(公告)日：1977-12-27
申请号：US684039
申请日：1976-05-07
摘要： A parameter, such as oil pressure, is repetitively sampled along with indications of speed, such as clock counts from a flywheel tooth counter, the parameter value and speed indications being stored and retained through at least several samplings, the parameter samplings being analyzed to find one of interest, the related speed indication thereupon being converted into speed dimensions for use. Specifically, oil pressure and engine speed indications are simultaneously sampled and stored, being retained for several sampling intervals, successive pressure readings are compared to find the knee in the curve of oil pressure as the pressure regulator begins to cut in, the pressure ultimately determined to be at the knee and the related speed indication being brought out for use, with conversion of the speed indication to rpm dimensions.
摘要翻译： 诸如油压的参数与速度指示重复采样，例如来自飞轮齿计数器的时钟计数，通过至少几个采样来存储和保持参数值和速度指示，分析参数采样以找到 一个感兴趣的，相关的速度指示被转换为使用的速度尺寸。 具体来说，油压和发动机速度指示被同时采样和存储，保持几个采样间隔，连续的压力读数被比较以在压力调节器开始切入时在油压曲线中找到拐点，最终确定为 在膝盖处，相关的速度指示被使用，将速度指示转换为rpm尺寸。
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3.发明授权
公开(公告)号：US4061026A
公开(公告)日：1977-12-06
申请号：US684329
申请日：1976-05-07
摘要： Diagnosing an internal combustion engine includes full throttle, specific speed tests such as measuring fuel pressure at two checkpoint speeds and at rated speed, and determining the pressure and speed where the governor reduces fuel pressure, an aneroid checkpoint of fuel pressure as a function of engine speed, and a fuel inlet restriction test, all without a dynomometer. The tests are performed with the throttle wide open, so that pressure can be measured downstream of the throttle at accessible taps, and/or to provide maximum fuel-flow test conditions. The speed comparisons are made during an acceleration with the throttle fully open, the instantaneous speed of which is accurately determined by flywheel tooth sensing. The speeds at which the specification pressure is to be checked is determined by comparing indications related to specification speeds expressed in terms of elapsed time between teeth of the flywheel, for a flywheel having the total number of teeth of the engine under test, rather than requiring full comparisons with actual speed expressed in terms of revolutions per minute.
摘要翻译： 诊断内燃机包括全油门，特定的速度测试，例如在两个检查点速度和额定速度下测量燃油压力，以及确定调速器降低燃油压力的压力和速度，燃油压力作为发动机的函数的无气体检查点 速度和燃料入口限制测试，全部没有dynomometer。 在节流阀打开的情况下执行测试，以便在可接近的水龙头处可以在节气门的下游测量压力，和/或提供最大的燃油流量测试条件。 在加速过程中进行速度比较，节气门完全打开，其瞬时速度由飞轮齿感测精确确定。 要检查规格压力的速度通过比较与根据飞轮齿之间的经过时间表示的规格速度相关的指示，对于具有被测发动机的总齿数的飞轮，而不是要求 与实际速度完全比较，以每分钟转数表示。
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公开(公告)号：US4046003A
公开(公告)日：1977-09-06
申请号：US684216
申请日：1976-05-07
CPC分类号： G01M13/00 , G01M15/044 , G01M15/09
摘要： The turbocharger of an internal combustion engine is diagnosed by virtue of a single pressure measurement made during an acceleration of the engine using only its accessory loading, drag and inertia as a load, instead of making a profile of pressure ratio across the turbocharger under full load conditions on a dynomometer, as in the prior art. As the engine accelerates, pressure is continuously monitored, the ratio of the rate of change of the pressure with respect to time is made, and the maximum change in pressure per unit of time recorded; the minimum pressure sensed may also be recorded as an indication of the restrictive effect of the turbocharger when not being driven to its capacity.
摘要翻译： 内燃机的涡轮增压器通过在发动机的加速期间仅使用其附件负载，牵引和惯性作为负载而进行的单个压力测量来诊断，而不是在满载下形成涡轮增压器的压力比轮廓 在现有技术中，在Dynomometer上的条件。 随着发动机加速，连续监测压力，压力变化率相对于时间的比率，以及记录的每单位时间的最大压力变化; 所感测的最小压力也可被记录为当不被驱动到其容量时涡轮增压器的限制作用的指示。
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公开(公告)号：US4102178A
公开(公告)日：1978-07-25
申请号：US781094
申请日：1977-03-25
CPC分类号： F01P11/0214 , F01P11/14 , G01M13/00
摘要： A measurement of the quantity of gas entering or within the coolant of an internal combustion engine cooling system, is made with the engine running, preferably at high idle speed, and a test is performed to ensure that the thermostat is open, whereby it is known that coolant is circulating through the entire cooling system, by providing a radiator cap connected to an orifice of a known size that will allow gas to escape from the cooling system and measuring substantially the pressure differential across the orifice, such as by measuring the pressure on the radiator side of the orifice with respect to atmospheric pressure.
摘要翻译： 在内燃机冷却系统的冷却剂中进入或内部的气体量的测量是通过发动机运转，优选地以高怠速进行的，并且进行测试以确保恒温器是开放的，从而已知 冷却剂通过整个冷却系统循环，通过提供连接到已知尺寸的孔口的散热器盖，其将允许气体从冷却系统逸出并且基本上测量穿过孔的压差，例如通过测量压力 孔的散热器侧相对于大气压。
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公开(公告)号：US4069712A
公开(公告)日：1978-01-24
申请号：US781091
申请日：1977-03-25
CPC分类号： G01M13/00 , F01P2025/04 , F01P2025/08
摘要： Electronic processing means are utilized in a composite measurement of performance of an engine cooling system thermostat, with diagnostic procedures to ensure viable measurement. The speed of the engine is initially tested to ensure the engine is at high idle speed, so that temperature in the cooling system will increase to that at which the thermostat will normally operate; and during the testing, the speed is continuously monitored to be sure it remains close to the initial test speed (near high idle) to minimize coolant pump pressure variations due to engine speed. Three temperature diagnostics are performed to ensure a viable test: first, if the temperature ever exceeds 15.degree. over the rated thermostat temperature, the test is terminated in a fault since the thermostat is presumed to be stuck in the closed position; second, if the temperature fails to increase by at least 2.degree. for each 2 minutes of operation above rated speed, the test is terminated in a fault since it is assumed that the thermostat is stuck in the open position; third, if the test is not completed within 5 minutes after the temperature reaching 5.degree. less than the rated thermostat temperature, the test is terminated in a fault since the thermostat operation is too imprecise to reliably perform the measurements of the operation (such as laggardly or stuck partially open). The actual thermostat operation measurements are the highest temperature reached before sensing either a temperature drop of 2.degree. below the highest temperature sensed theretofore, or sensing a pressure drop of 5 psi below the highest pressure sensed theretofore.
摘要翻译： 电子处理装置用于对发动机冷却系统恒温器的性能的综合测量，并具有确保可行测量的诊断程序。 最初对发动机的速度进行测试，以确保发动机处于高怠速状态，使得冷却系统中的温度将增加到恒温器正常工作的温度; 并且在测试期间，连续监测速度以确保其保持接近初始测试速度（接近高怠速），以最小化由于发动机转速引起的冷却剂泵压力变化。 执行三个温度诊断以确保可行的测试：首先，如果温度超过额定恒温器温度超过15°，则测试终止于故障，因为恒温器被推定为卡在闭合位置; 第二，如果温度在额定转速以上每2分钟运行一次，温度不能升高至少2℃，则由于假设恒温器处于打开位置，所以测试终止于故障。 第三，如果测试在温度达到恒温器温度5度以后5分钟内没有完成，则测试终止于故障，因为恒温器操作太不精确，以可靠地执行操作测量（如落地 或卡住部分打开）。 实际的恒温器操作测量值是在感测到比之前感测到的最高温度低2度的温度降低之前达到的最高温度，或者感测到在其之前感测到的最高压力以下5psi的压降。
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公开(公告)号：US4069707A
公开(公告)日：1978-01-24
申请号：US781093
申请日：1977-03-25
CPC分类号： G01M13/00 , F02B2075/025 , F02B3/06
摘要： As used herein, the term "power" means a factor indicative of or related to horsepower, computed from acceleration and speed, with or without an empirically-determined inertia constant. A measurement of the operation of the governor of an internal combustion engine, such as a diesel engine having a primary distributing pump for providing fuel in a time related fashion to the fuel injectors, and in which fuel pressure is not an indication of governor operation, is the speed at which a line defined by two points measured on the power/speed characteristic of the engine intersects with an empirically-determined line emanating from the measured high idle speed point on the zero power speed abscissa of the power/speed characteristic. Two power measurements, each including time and speed, are made at different speeds as the engine accelerates with only its own drag, inertia and accessories as loads thereon. The difference therein, with or without horsepower calculations using an empirically-determined inertia constant, over the difference in speed provides the slope of an idealized, straight-line power/speed characteristic. An empirically-determined slope, with or without correction for the actual high idle speed measured, defines a second, idealized straight line indication of governor action in limiting fuel at high idle speed. From simply geometry, the intersection of these two straight line power/speed related representations is found as a measure of the balance point speed which is the speed at which the governor action begins.
摘要翻译： 如本文所使用的，术语“功率”是指根据加速度和速度计算出的，具有或不具有经验确定的惯性常数的表示马力或与之相关的因子。 内燃机的调速器的测量，例如柴油发动机的运行，该柴油发动机具有与燃料喷射器以时间相关的方式提供燃料的主分配泵，其中燃料压力不是调速器运行的指示， 是由在发动机的功率/速度特性上测量的两点所定义的线的速度与在功率/速度特性的零功率速度横坐标上测量的高怠速点发生的经验确定的线相交的速度。 两个功率测量，每个包括时间和速度，以不同的速度进行，因为发动机只有其自身的阻力，惯性和附件作为负载加速。 其中的差异，使用或不使用经验确定的惯性常数的马力计算，超过速度差提供了理想化的直线功率/速度特性的斜率。 经验确定的斜率，对于所测量的实际高怠速，有或没有校正，定义了在高空转速度下限制燃料的调速器作用的第二个理想化直线指示。 从简单的几何学，这两条直线功率/速度相关表示的交点被找到作为调速器动作开始速度的平衡点速度的量度。
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公开(公告)号：US4062231A
公开(公告)日：1977-12-13
申请号：US684218
申请日：1976-05-07
CPC分类号： G01M13/00 , F01P11/14 , F01P11/16 , F01P2025/04 , F01P2025/32
摘要： A single pressure transducer tapped into the cooling system of an engine, downstream of the pump, is used to measure coolant pressure at high idle and coolant pressure at low idle while the water temperature is such as to assure the thermostat is closed; the pressure readings are equivalent to the pressure across an orifice or restriction formed by the coolant bypass when the thermostat is closed; the combination of high idle pressure and difference between high idle pressure and low idle pressure permit diagnosing whether the pump is faulty or whether there is unduly large restriction in the engine, which otherwise could not be known with a single pressure reading.
摘要翻译： 在水下游的发动机的冷却系统中的单个压力传感器被用于在低空闲时在高空闲和冷却剂压力下测量冷却剂压力，同时水温度确保恒温器关闭; 当恒温器关闭时，压力读数等效于穿过孔或由冷却剂旁路形成的限制的压力; 高怠速压力和高怠速压力与低怠速压力之间的差异的组合允许诊断泵是否有故障，还是在发动机中是否存在过大的限制，否则在单个压力读数下不能知道。
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公开(公告)号：US4055995A
公开(公告)日：1977-11-01
申请号：US747759
申请日：1976-12-06
CPC分类号： G01M15/00 , G01L3/24 , G01M15/044
摘要： The first one of horsepower measurements utilizing an emperically-determined horsepower constant, made with electronic diagnostic equipment employing engine transducers, during three successive acceleration bursts from a low engine speed to a high engine speed is compared against the second and third ones thereof, the percentage difference therebetween being an indication of air accumulated at the fuel intake of the internal combustion engine.
摘要翻译： 将从低发动机速度到高发动机转速的三个连续加速爆发期间，利用使用发动机换能器的电子诊断装置制造的使用确定的马力常数的第一个马力测量与其第二和第三个比较， 它们之间的差异是在内燃机的燃料吸入处累积的空气的指示。
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