Bosch 2008 User Manual download pdf (Page 39)

Gasoline injection components | A37

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 ...

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 74 75

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Bosch 2008 User Manual Page 39