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Gasoline injection components | A39
2008 | 2009 Bosch Automotive Aftermarket
Injectors (mechanical)
Systems:
K, KE-Jetronic, KE-Motronic
Purpose:
K-Jetronic valves open at a precisely defined fuel pressure (usually between 3.5 and 4.1 bar). In
this process the valve needle oscillates at a high frequency and the fuel is thoroughly atomized
even in the case of very small injected quantities. Each cylinder is assigned an injector, which
injects the fuel directly upstream of the engine intake valves. Atomization, opening pressure
and freedom from leaks have a major influence on emission characteristics, fuel consumption
and starting performance. To avoid unmetered air and leakage, the O-rings are always to be
replaced prior to installation.
Part number:
0 437 502 ...
Injectors EV10 (electromagnetic)
Systems:
Mono-Jetronic, Mono-Motronic
Purpose:
The injector EV10 is installed in the top section of the central injection unit. In this case
one injector supplies all the cylinders with fuel. The fuel is injected into the intake manifold
upstream of the throttle valve. As each ignition pulse also triggers an injection pulse, the EV10
is designed for very short switching times. During injection, the valve needle is lifted off its
seat by approx. 0.06 mm. Even the slightest fuel contamination can impair operation. Injectors
to suit each central injection unit can be found in the replacement parts range as of Page A 46.
Part number:
0 280 150 051 – 0 280 150 099, 0 280 150 651 – 0 280 150 699
Knock sensors
System:
Motronic
Purpose:
The knock sensor converts vibration into electric signals. This enables the electronic control
unit to detect knocking combustion and to retard the ignition point to prevent engine damage.
In some cases several sensors are attached to the engine block for knock-control purposes.
Part number:
0 261 231 ...