GF27.60-D-5140HF Regulating Valve, Component Description

GF27.60-D-5140HF Regulating Valve, Component Description
- TRANSMISSION 722.6


Shift pressure regulating valve





2a Valve body of shift plate
2b Valve body of shift plate
30a Overlap regulating valve 1-2/4-5 (with sleeve and piston)
30b 2-3 overlap regulating valve 2-3 (with sleeve and piston)
30c 3-4 overlap regulating valve (with sleeve and piston)

Location

An overlap regulating valve is assigned to each shift group. The 1-2/4-5 overlap regulating valve is installed in the shift plate valve housing, the 2-3 and 3-4 overlap regulating valves are installed in the shift plate valve body.

Task

The overlap regulating valve regulates the pressure reduction during a shift phase.





0 Oil sump drain
30 Overlap regulating valve
30c Annular surface on overlap regulating valve

p-A Working pressure
p-Mod Modulating pressure
p-S Shift pressure
p-u Overlap pressure

Function

During the shift phase the pressure in the disengaging actuator is regulated depending on the modulating pressure (engine load) as well as on the pressure in the engaging actuator. The regulated compression is inversely proportional to the transmission capability of the engaging actuator (regulated overlap).