Bosch 2008 - Manual (Page 46)

A 44 | 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 ...