JPS636733B

The exhaust recirculation valve 5 is opened by vacuum supplied to an actuator 7 when the valve 13 is open in response to less than a predetermined deflection of the control lever 26 of the fuel injection pump governor and less than a predetermined engine speed or less than a predetermined displacement of the governor sleeve 23. A switch 14 in the circuit of the solenoid of the valve 13 may be closed by the cam 42 at less than a predetermined deflection of the lever 26 and the switch 17 may be closed except when fuel under pressure from the governor chamber is permitted to flow to the switch actuator by the passages 30, 39, 40, when the governor sleeve port 38 registers with the groove 36. An engine speed between upper and lower predetermined values may cause closure of a circuit switch (48), Fig. 3 (not shown). A throttle valve (55), Fig. 5 (not shown), in the engine air intake 3 may be operated by a vacuum modified in dependence on the position of the lever 26.