Diesel engine exhaust gas feedback control - regulates flow vol. through exhaust gas feedback channel dependent on press. in exhaust gas line containing particle filter

摘要

The control uses a valve (4) for regulating the exhaust gas vol. fed along a feedback channel (3) between the engine exhaust line (2) and the engine air intake (1). The press. in the exhaust gas line is detected via a press. sensor upstream of a particle filter (9) incorporated in the exhaust line, for reducing the gas vol. fed through the feedback channel, in response to a detected increase in the press. Pref. the control valve has a reduced press. chamber (36) and a cooperating membrane (46). The press. in the reduced press. chamber is controlled via a press. control valve (6) with a stepping motor (33) as the setting drive. ADVANTAGE - Maintains constant exhaust gas feedback flow unaffected by particle collection by filter.