挂车前气室 代尔汽车 DE3519

组合式弹簧制动气室用于为车轮提供制动力，它由膜片腔和弹簧腔两部分组成，膜片制动部分用于行车制动，弹簧制动部分用于辅助制动和停车制动，而弹簧制动部分与膜片制动部分是完全独立工作的。

the combined spring brake actuator which create the force for wheel braking .they consist of the diaphragm part and the spring brake part,the diaphragm section for the service brake system and the spring brake section for the secondry and parking system .the diaphragm actuator section is completely independent in operation form the spring brake section.