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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：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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公开(公告)号：US4100793A
公开(公告)日：1978-07-18
申请号：US781092
申请日：1977-03-25
CPC分类号： G01M13/00 , G01M15/044
摘要： The average of two horsepower measurements utilizing an empirically-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 with the air/fuel ratio regulator defeated so as to provide full fuel, is compared against the average of two additional such horsepower measurements made in three additional acceleration bursts which are underfueled due to feeding the air/fuel regulator with atmospheric air; the horsepower difference is a measure of the action of the air/fuel regulator; one burst of each set simply purges air accumulations in the fuel lines, if any. If desired, indications of horsepower may be calculated without an inertia constant, since the measurements herein are comparative.
摘要翻译： 在使用发动机换能器的电子诊断装置制造的两个马力测量值的平均值在从低发动机速度到高发动机转速的三个连续的加速期间，空气/燃料比调节器被击败以提供 全燃料与平均两次额外的这种马力测量进行比较，其中三次额外的加速度爆发由于空气/燃料调节器与大气空气的供给而未充分燃烧; 马力差异是空气/燃料调节器的作用的量度; 每组的一个爆发只需清除燃油管路中的空气积聚（如果有的话）。 如果需要，可以计算出马力的指示而没有惯性常数，因为这里的测量是比较的。
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