《汽車發動機性能試驗方法》規定了汽車發動機在臺架上所進行的動力性、經濟性及其他重要性能的試驗方法。它適用于汽車用往復式內燃機，包括四沖程及二沖程、水冷及風冷、增壓及非增壓的汽油機和柴油機。具體包括下列11項性能試驗。
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.
①一般性起動試驗。評定發動機一般起動性能。
(1) General starting test. Assess the general starting performance of the engine.
②柴油機怠速試驗。評定柴油機怠速穩定性。
(2) Idle speed test of diesel engine. Evaluation of idle speed stability of diesel engine.
③汽油機怠速試驗。評定汽油機怠速穩定性及怠速排放量。
(3) Idle speed test of gasoline engine. To evaluate the idle stability and idle emission of gasoline engine.
④功率試驗。評定發動機在全負荷下的動力與經濟等性能。
(4) Power test. Evaluate the power and economic performance of the engine under full load.
⑤負荷特性試驗。在規定轉速下，評定發動機部分負荷的經濟性。
_Load characteristic test. The economy of engine partial load is evaluated at specified speed.
⑥萬有特性試驗。評定發動機在各種工況下的經濟性，為汽車選用發動機提供依據。
_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柴油機調速特性試驗。評定柴油機的穩定調速率。
_Speed regulation characteristic test of diesel engine. Evaluate the steady speed regulation rate of diesel engine.
⑧機械損失功率試驗。評定發動機的機械損失功率。
_Mechanical power loss test. Evaluate the mechanical loss power of the engine.
⑨各缸工作均勻性試驗。為了提高發動機的燃油經濟性，節省能源，減少爆燃及排氣污染，進行此試驗。 ⑩機油消耗量試驗。評定發動機在規定工況下的機油消耗量。
_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.
活塞漏氣量試驗。評定活塞組與缸筒之間的密封性，用來監測這對摩擦副的工作情況，以便能較早地發現拉傷或卡環等故障。
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.
