GF07.61-P-3007V The ME Limiting Maximum Vehicle Speed Function

GF07.61-P-3007V The ME Limiting Maximum Vehicle Speed Function







The ME control unit detects the engine speed via the crankshaft Hall sensor signal. As a protection for the engine and the drive train, engine speed is limited by retarding the ignition timing and switching off the fuel injection valves if the following conditions exist:

1. Transmission overload protection
1.1. Torque converter protection of automatic transmission
In order to protect the torque converter in selector lever positions P and N (no power flow) from excessive static internal pressure, engine speed is limited to approx. 4200 rpm.
1.2. Mechanical transmission (no gear engaged)
In order to avoid damage to the transmission engine speed is limited to approx. 4000 rpm.

2nd Limiting maximum engine speed when driving
In order to protect the engine from the consequences of impermissibly high revs, engine speed is limited to 6000 rpm. The driving mode is detected from the vehicle speed signal.

3rd Throttle valve actuator defective
If the throttle valve actuator is faulty, the engine speed in neutral is restricted to approx. 1400 rpm and in driving mode to approx. 1800 rpm.