电喷主机排气阀Exhaust Valve Design（一）

Exhaust Valve System(排气阀系统)

1)Exhaust valve actuator
排气阀执行机构
2)Exhaust valve
排气阀
3)Special running conditions
特殊的运行条件

Exhaust Valve Actuation MCversusME

(排气阀的运行)

Exhaust Valve Pipe Connections

(排气阀管理连接图)

ExhaustValve ActuatorWorkingPrinciple

(排气阀执行机构的工作原理)

The FIVA valve which drives the actuator on the exhaust side has two positions,
open or shut.
When it is opened with a binary signal from the engine control system,the hydraulic oil is forced in and pushes the pistons upwards,thus opening the engine's exhaust valve via the hydraulic push rod.
The pressure is permanently maintained until the FIVA valve is activated to block the pressure when the required exhaust phase is completed.
The exhaust valve is returned to its closed position by the force from the air spring.
Unpressurised hydraulic oil
Pressurised hydraulic oil

驱动排气侧执行器的FIVA阀有两个位置，

打开或关闭。

当用发动机控制系统发出的二进制信号打开时，液压油被压入并向上推动活塞，从而通过液压推杆打开发动机的排气阀。

当所需的排气阶段完成时，压力将永久保持，直到激活FIVA阀门以阻塞压力。

在空气弹簧的作用下，排气阀恢复到关闭位置。

Exhaust valve actuator(S70ME-C
(排气阀执行机构)

ExhaustValve Actuation(排气阀的运行)

DesignFeatures MC versus ME

(设计特点)

DesignDetails(设计细节)