Bosch 2008 User Manual download pdf (Page 43)

Gasoline injection components | A41

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 ...

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Bosch 2008 User Manual Page 43