BRENNKRAFTMASCHINE MIT EINER VORRICHTUNG ZUR ABGASRUECKFUEHRUNG

摘要

The control vacuum derived downstream or in the vicinity of the mixture throttle valve 13 and acting on the actuators 23, 24 of the exhaust gas recirculation and secondary air valves 15 and 18 is modified by a valve 27 responsive to the venturi vacuum and the vacuum in the secondary air passage 16 downstream of a restriction 19. A valve 38 responsive to the control vacuum adjusts operation of the valve 27 by opening an air bleed to the venturi vacuum chamber 34 of the valve or by forming the restriction in the passage 16, Fig. 2 (not shown).