《汽车发动机性能试验方法》规定了汽车发动机在台架上所进行的动力性、经济性及其他重要性能的试验方法。它适用于汽车用往复式内燃机，包括四冲程及二冲程、水冷及风冷、增压及非增压的汽油机和柴油机。具体包括下列11项性能试验。
The Test Method of Automobile Engine Performance stipulates the test method of power, economy and other important performance of automobile engine on the bench. It is suitable for automotive reciprocating internal combustion engines, including four-stroke and two-stroke, water-cooled and air-cooled, supercharged and non-supercharged gasoline engines and diesel engines. It includes the following 11 performance tests.
①一般性起动试验。评定发动机一般起动性能。
(1) General starting test. Assess the general starting performance of the engine.
②柴油机怠速试验。评定柴油机怠速稳定性。
(2) Idle speed test of diesel engine. Evaluation of idle speed stability of diesel engine.
③汽油机怠速试验。评定汽油机怠速稳定性及怠速排放量。
(3) Idle speed test of gasoline engine. To evaluate the idle stability and idle emission of gasoline engine.
④功率试验。评定发动机在全负荷下的动力与经济等性能。
(4) Power test. Evaluate the power and economic performance of the engine under full load.
⑤负荷特性试验。在规定转速下，评定发动机部分负荷的经济性。
_Load characteristic test. The economy of engine partial load is evaluated at specified speed.
⑥万有特性试验。评定发动机在各种工况下的经济性，为汽车选用发动机提供依据。
_Universal Characteristic Test. To evaluate the economy of the engine under various working conditions, and to provide a basis for the selection of engines for automobiles.
⑦柴油机调速特性试验。评定柴油机的稳定调速率。
_Speed regulation characteristic test of diesel engine. Evaluate the steady speed regulation rate of diesel engine.
⑧机械损失功率试验。评定发动机的机械损失功率。
_Mechanical power loss test. Evaluate the mechanical loss power of the engine.
⑨各缸工作均匀性试验。为了提高发动机的燃油经济性，节省能源，减少爆燃及排气污染，进行此试验。 ⑩机油消耗量试验。评定发动机在规定工况下的机油消耗量。
_Work uniformity test of each cylinder. In order to improve the fuel economy, save energy and reduce deflagration and exhaust pollution of the engine, this test was carried out. _Oil consumption test. Assess the oil consumption of the engine under specified operating conditions.
活塞漏气量试验。评定活塞组与缸筒之间的密封性，用来监测这对摩擦副的工作情况，以便能较早地发现拉伤或卡环等故障。
Piston leakage test. Assess the sealing between the piston group and cylinder to monitor the working condition of the friction pairs, so as to detect the pull or clasp faults earlier.
