Bosch 2008 - Manual (Page 32)

A 30 | Gasoline injection components
Bosch Automotive Aftermarket 2008 | 2009
A 30 | Gasoline injection components
Gasoline injection components
A to Z guide
Acceleration sensor
System:
Motronic
Purpose:
Compliance with OBDII requirements (engine management on-board diagnostics) demands
the detection of misfiring at individual cylinders as well as misfiring distributed randomly over
all the cylinders. This is achieved by recording the fluctuations in crankshaft speed. Speed
fluctuations also occur as a result of driving on particularly rough roads and frequent road
surface irregularities. Such road surface irregularities additionally give rise to extreme body
acceleration, which is measured by way of an acceleration sensor. This signal is used to block
the misfiring detection function.
Part number:
0 273 101 02.
Air-flow sensor
Systems:
L-Jetronic, Motronic
Purpose:
The air flowing into the engine deflects a sensor plate in opposition to the restoring force of
a spring. A potentiometer converts the deflection of the sensor plate into a voltage.
The electronic control unit uses this signal to calculate the quantity of fuel required.
Part number:
0 280 200 ..., 0 280 201 ..., 0 280 202 ..., 0 280 203 ...,
BX: 0 986 280 0..
Air-flow sensor (mechanical)
Systems:
K, KE-Jetronic, KE-Motronic
Purpose:
The air-flow sensor and the fuel distributor together form the mixture-control unit. The two
components are available separately and must be replaced separately. The air flowing through
the air funnel deflects the sensor plate by a certain distance. The sensor-plate deflection is
transmitted to the fuel distributor by way of a lever system.
Part number:
0 438 120 ..., 0 438 121 ..., F 026 TX2 ...,
BX: 0 986 439 ...