EMISSION CONTROL
EGR VALVE
1.
2.
3.
4.
EGR valve vacuum port
EGR valve assembly
Gasket - EGR valve to inlet manifold
EGR pipe connection
5. Exhaust gas intake
6. Intake air
7. EGR valve open (vacuum applied to EGR valve)
8. EGR valve closed (no vacuum applied to EGR
valve)
The EGR valve is a cast and machined assembly which locates on the front end of the inlet manifold assembly.
The machined faces of the EGR assembly and the inlet manifold are attached attached together using four bolts
passing through the four corners of a flange in the EGR assembly to tappings in the front face of the inlet manifold.
A gasket is used to seal the interface between the EGR valve and the front face of the inlet manifold. The gasket
should be changed every time the EGR valve assembly is removed from the air intake manifold.
The intake side of the EGR valve allows the passage of fresh intercooled air through to the inlet manifold via a
rubber hose which is attached to the front face of the EGR valve assembly by a metal band clamp. The bottom
port of the EGR valve is connected to the EGR pipe using a metal band clamp.
A vacuum port on top of the EGR valve connects the EGR solenoid through a blue, small bore suction hose.
When a vacuum is applied to the EGR valve suction port it causes a spindle with sealing disc (EGR valve) to be
raised, thereby opening the port at the EGR pipe to allow the recirculated exhaust gas to pass through into the
inlet manifold. When the vacuum is removed from the suction port the EGR valve returns to its rest position under
the influence of a spring to tightly close the exhaust gas port. Thus, controlled opening of the EGR valve
determines the mass of recirculated gas allowed to flow through to the inlet manifold.
DESCRIPTION AND OPERATION
11
| Categories | Land Rover, Land Rover Defender |
|---|---|
| Tags | Land Rover |
| Model Year | 1999, 2000, 2001, 2002 |
| Download File |
|
| Document Type | Workshop Manual |
| Language | English |
| Product Name | Defender |
| Product Brand | Land Rover |
| Document File Type | |
| Publisher | landrover.com |
| Wikipedia's Page | http://en.wikipedia.org/wiki/Land_Rover |
| Copyright | Attribution Non-commercial |
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