Specifications

Service Training
Section 4.9
Page 23
12.05
4.9.2.2 ELECTRONIC ENGINE-SPEED CONTROL
FUNCTION OF THE CONTROL SYSTEM
With gas-propellant trucks, the engine speed is kept constant, up to the performance limits of the engine,
with the electronic control system, in spite of varying loads caused by the drive and lift hydraulics. Thus
the engine power corresponds to the appropriate r.p.m., according to the pedal setting (transmission).
ADVANTAGES OF THE CONTROL SYSTEM
The control system has an electronic regulator with proportional, integral and differential operation. The
following advantages follow from these properties in comparison with proportional regulators [alone]:
- No pressure on the drive motor;
i.e. maximum idling speed = rated speed;
resulting in a reduction of noise and gas consumption.
- Regulation of idling speed;
i.e. no need for idling-speed limiting screw, resulting in very minor engine speed changes with variations
in engine temperature.
- No engine speed adjustment required,
so that the r.p.m.speed regulator can be replaced without adjustment.