Engine braking system test method

The invention discloses an engine braking system test method, which mainly comprises the following steps: step 1, carrying out an engine braking system test, and detecting braking resistance power when an engine brakes and does not work, and transmission system resistance power or vehicle driving resistance power when a transmission is in a neutral gear; and step 2, carrying out data processing: calculating the engine braking power and the engine braking contribution power according to the data detected in the step 1. The engine braking system test adopts a chassis dynamometer test method or aroad test method. The test method provided by the invention is simple to operate, the engine brake system can be quickly tested and evaluated through a chassis dynamometer or a road test, two indexes, namely the engine brake power and the engine brake contribution power, are proposed as evaluation and inspection standards, and the test efficiency and precision are improved. 本发明公开了一种发动机制动系统测试方法，主要包括：步骤一、进行发动机制动系统试验，分别检测发动