Bosch 2008 User Manual download pdf (Page 32)

A30 | Gasoline injection components

Bosch Automotive Aftermarket 2008 | 2009

A30 | 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 ...

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 74 75

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Bosch 2008 User Manual Page 32