Bosch 2008 - Manual (Page 39)

Gasoline injection components | A 37
2008 | 2009 Bosch Automotive Aftermarket
Idle actuator
Systems:
LH, KE-Jetronic, KE-Motronic, Motronic
Purpose:
The idle actuator is installed in a bypass around the throttle valve and keeps the idling speed
steady under all conditions. Electrical actuation is effected by way of the engine control unit or
the idle controller on vehicles with idle-speed control. Extensive use is made of idle actuators
with hose connection. Add-on idle actuators are also employed in Motronic systems.
Part number:
0 280 140 5 ..
Idle controller (electronic control unit)
Systems:
All systems with idle-speed control
Purpose:
The idle controller regulates the rotary idle actuator and keeps the engine idling speed
absolutely steady. This avoids speed fluctuations when such loads as power steering,
air conditioner or automatic-transmission gearshift are activated.
Part number:
0 280 220 ...
Ignition coil
Purpose:
The operating principle of an ignition coil is based on Faraday’s law. Modern ignition coils
consist of iron cores made up of individual laminations and a plastic casing. To provide better
insulation of the windings, the casing is cast in epoxy resin or asphalt.
The pencil coil shown is one of the plastic ignition coils. It provides high spark energy (> 60 mJ)
and a long spark duration (≥ 1.8 ms) and thus ensures reliable, optimum combustion of the air/
fuel mixture under all engine operating conditions.
Part number:
0 221 ... ..., F 000 ZS0 ..., 1 227 030 ..., 0 986 221 ...