| 摘要 |
An exhaust gas recirculating (EGR) valve is provided in a line connecting engine exhaust gases to the intake manifold to control the flow; a positioning servo is attached to the EGR valve and is operated by the pressure from an engine driven air pump; a position regulator servo is actuated by a modified air pump pressure to move an air bleed device normally bleeding the air pump pressure so that the EGR valve does not open; the air bleed device minimizes the hunting of the positioning servo and fixes the EGR valve in the position called for by the positioning regulator. |
