Bosch 2008 - Manual (Page 43)

Gasoline injection components | A 41
2008 | 2009 Bosch Automotive Aftermarket
Pressure regulator
Systems:
D, L, LH-Jetronic, Mono-Jetronic, Motronic, Mono-Motronic
Purpose:
The pressure regulator is designed to maintain the system-specific difference in pressure be-
tween the fuel-supply line and the intake manifold at a constant level. The regulator is located
at the end of the fuel rail (in the top section of the central injection unit on Mono systems).
If the set pressure is exceeded, a diaphragm-actuated valve opens up the return pipe and the
depressurized surplus fuel flows back to the tank.
Note:
The pressure regulator at the central injection unit cannot be replaced separately. Bosch
supplies top sections with pre-assembled pressure regulator for this purpose (as of Page A 46).
Part number:
0 280 160 0.., 0 280 160 2.., 0 280 160 5.., 0 280 160 7..,
0 438 161 ... Primary-pressure regulator for KE-Jetronic/Motronic
Pressure sensors (Motronic)
System:
Motronic
Purpose:
Pressure sensors can be used for a variety of applications. Intake-manifold pressure sensors
measure the absolute pressure in the intake manifold. These sensors are either integrated into
the electronic control unit or fitted in the vicinity of the intake manifold in the form of externally
mounted sensors. Modern systems featuring on-board diagnosis are additionally fitted with
tank-pressure sensors. Modern DUO sensors combine pressure and temperature measurement.
Part number:
0 261 230 ...
Pressure sensors (altitude sensors)
Systems:
L, K, KE-Jetronic, Motronic
Purpose:
Pressure sensors detect the atmospheric pressure and relay this to the electronic control
unit in the form of a voltage signal. This prevents the over-enrichment and increased fuel
consumption normally associated with decreasing atmospheric pressure at high altitudes.
Part number:
0 280 101 ...
Pressure-control valve (DSV)
Purpose:
The pressure-control valve is positioned between the fuel rail (KVS-HD) and the low-pressure
end of the high-pressure pump (HDP-1). The pressure in the rail is set by varying the flow
cross-section. The surplus fuel conveyed is returned to the tank.
Part number: 0 261 540 ...