胡世伟¹，贾学冬¹，王超¹，宋志辉¹，袁爽¹，沈源¹，王瑞平^1,2

(1.宁波吉利罗佑发动机零部件有限公司，宁波 315000；

2.浙江吉利罗佑发动机有限公司，宁波 315800)

摘要：在车辆行驶过程中，为保证足够的刹车制动力，通常需要一些辅助力保证刹车制动；发动机进气歧管通常为提供刹车助力的主要部件。本文对进气歧管真空度不足问题做了简要介绍，就发动机进气歧管真空度不足原因进行了相关试验并进行了详细阐述。

关键词：试验；发动机进气歧管；发动机

Abstract: In order to get enough braking force ,usually need some assistant force to guarantee the braking when the vehicle is running. The engine’s intake manifold is the main part that provide the vacuum pressure . A brief introduction of intake manifold’s pressure insufficient in this article and necessary some experiments for the engine’s intake manifold’s vacuum  pressure  insufficient  are expounded in detail.

Key words: Experiment； Engine intake manifold； Engine