Glossary “back pressure EGR” Definition:
Some emissions-control systems use a back-pressure sensor or diaphragm to monitor back pressure so that exhaust gas recirculating flow can be increased when the engine is under maximum load, and producing maximum back pressure.
What is back pressure?
back pressure
Glossary “back pressure” Definition:
1). Resistance of an exhaust system to the passage of exhaust gases. This can have an adverse effect on performance, fuel economy, and emissions. Excessive back pressure may be caused by the clogged catalytic converter, or a dented or crimped pipe. 2). The excessive pressure buildup in an engine crankcase.
back pressure EGR valve
Glossary “back pressure EGR valve” Definition:
A back-pressure-dependent EGR valve. See the specific application; negative-back-pressure EGR valve or positive-back-pressure EGR valve, as applicable.