Danger Mouse
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Hi Folks.
After chatting with a mate at work about his Ford Galaxy EGR & dealer problems I decided to have a peek at the Honda's set up.
I looked around on t'internet but didn't find anything that directly related to the Accord 2.2 i-ctdi, so I set about the car with the socket set!
The bits:
Under the plastic cover and at the front of the engine there is the intake manifold and attached to that on the right hand side (looking at the engine from infront of the car) there is a butterfly valve block and the connection from the Charge Air Cooler (CAC). Attached to the front of the manifold there is a st/st link pipe that connects the EGR cooler to the intake manifold, the EGR cooler is under the manifold and the EGR valve is attached to the right of the engine block, I didn't look at that 'cos it looked too much like hard work.
The system:
EGR is a method of introducing an inert volume of gas into the combustion chamber to reduce the combustion temperature to less than 2500 deg C. This is the critical temperature where NOx is created.
Now, does the ECU know that the passage way is restricted and not letting the right volume of gas in?
And is the restriction messing up the clean running of the engine, perhaps making it less efficient or more smoky?
The gas route is known as the long route and is taken from the low pressure side of the turbo controlled with a valve, cooled and fed into the intake. In the case of the Honda the link pipe connects to a plenum in the manifold and is then fed through an open passage to mix with the air from the CAC then to go into the manifold again.
To be continued...
After chatting with a mate at work about his Ford Galaxy EGR & dealer problems I decided to have a peek at the Honda's set up.
I looked around on t'internet but didn't find anything that directly related to the Accord 2.2 i-ctdi, so I set about the car with the socket set!
The bits:
Under the plastic cover and at the front of the engine there is the intake manifold and attached to that on the right hand side (looking at the engine from infront of the car) there is a butterfly valve block and the connection from the Charge Air Cooler (CAC). Attached to the front of the manifold there is a st/st link pipe that connects the EGR cooler to the intake manifold, the EGR cooler is under the manifold and the EGR valve is attached to the right of the engine block, I didn't look at that 'cos it looked too much like hard work.
The system:
EGR is a method of introducing an inert volume of gas into the combustion chamber to reduce the combustion temperature to less than 2500 deg C. This is the critical temperature where NOx is created.
Now, does the ECU know that the passage way is restricted and not letting the right volume of gas in?
And is the restriction messing up the clean running of the engine, perhaps making it less efficient or more smoky?
The gas route is known as the long route and is taken from the low pressure side of the turbo controlled with a valve, cooled and fed into the intake. In the case of the Honda the link pipe connects to a plenum in the manifold and is then fed through an open passage to mix with the air from the CAC then to go into the manifold again.
To be continued...