Bosch 2008 User Manual download pdf (Page 46)

A44 | Gasoline injection components

Bosch Automotive Aftermarket 2008 | 2009

Throttle-valve switch

Systems:

D, L, LH, KE-Jetronic, Motronic

Purpose:

The throttle-valve switch is attached to the throttle-valve assembly. The switch is actuated by

the throttle-valve shaft. One contact is made in each case in the “idle” and “full load” positions.

These signals enable the electronic control unit to activate the idle-increase function with a

cold engine and enrichment at full load.

Part number:

0 280 120 000 – 0 280 120 499

Vacuum limiter

Systems:

L, LH, K, KE-Jetronic, Motronic

Purpose:

The vacuum limiter restricts the difference in pressures upstream and downstream of the

throttle valve. Additional air ﬂows into the intake manifold if the set pressure difference is

exceeded.

Part number:

0 280 160 1.., 0 280 160 3..

Warm-up regulator

System:

K-Jetronic

Purpose:

Warm-up regulators comprise a spring-controlled diaphragm valve and an electrically heated

bimetallic spring. As a function of engine temperature and time, the control pressure in the fuel

distributor is reduced and more fuel is injected into the engine.

Part number:

0 438 140 ...

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 74 75

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Bosch 2008 User Manual Page 46