一、等效试车的基本设想 柱塞式燃油泵构造复杂、精密、功能繁多,但归根到底它是一个机械装置。机械构件本身的失效一般都是由于磨损、疲劳引起的,因此等效要研究的问题就是磨损和疲劳。 燃油泵按原规程试车t小时,说明油泵在t小时内保证了规定条件下的正常工作,此时油泵本身也遭受到一定程度的损伤(?);若采用加大载荷工作t′小时,说明油泵t′小时内保证了加大应力条件下的工作,油泵本身同时受到的损伤为(?)′。对于具体型号产品,应按使用中出 First, the basic idea of ​​the equivalent test Plunger fuel pump structure is complex, sophisticated, versatile, but in the final analysis it is a mechanical device. The failure of the mechanical components themselves is generally due to wear and fatigue, so the equivalent of the problem to be studied is wear and fatigue. The fuel pump according to the original code test t hours, indicating that the pump in the t hours to ensure the normal conditions under the provisions of the conditions, this time the pump itself has also been a certain degree of damage (?); If the use of increased load t ’hours, indicating Oil pump t ’within hours to ensure the work under increased stress conditions, the pump itself suffered damage (?)’. For specific models, should be used in the out