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Revotron 1.2T
150
Circuit Schematic Diagram :
Connector Information :
Con
ID
Wire
ID
Color Size Material
Option
1
454
B
0.50 FLRYB
(AD)
2
453
W
0.50 FLRYB
(AD)
Connector View :
Component Specification :
The knock sensor provides input to ECU
based on the vibration generated by
'knocking', which will enable ECU to limit
ignition timing (Advance) for optimum
efficiency. The knocking is the vibration
generated due to uncontrolled combustion,
due to which a charge transfer occurs in the
sensor and as a result voltage is generated
which is transmitted to ECU. The knock
sensor is mounted on the cylinder block.
Application of Knock Sensor :
A piezo sensitive knock sensor with linear
characteristic is mounted on the engine block.
It transforms the structure borne vibrations
into electrical signals which can be evaluated
by the engine's ECU. The knock sensor signal
is evaluated according to intensity and
spectral information of knocking and non-
knocking combustions. As a consequence the
ignition parameter will be adjusted for the next
combustions.
Temperature Range : -40
0
C to +180
0
C
Mechanical & Electrical Characteristics :
Main resonance frequency of Sensor head: >
30 kHz
Up to 30kHz the sensitivity must not exceed
200 mV/g.
Capacitance (of sensor head): C = 1150 ±
200 pF
Capacitance measured at frequency 1kHz,
parallel; sensor mounted with torque 20±5Nm.
Due to parallel circuit of both sensor head and
wire capacitance only the total capacitance
can be measured.
Temperature dependence of capacitance,
related to 20
0
C room temperature.
for temperature -40
0
C... + 20
0
C
≤
1.9 pF/K
for temperatures +20
0
C ... + 150
0
C
≤
3,3 pF/K
Shunt resistor : 4.9M
Ω
± 20%
after ageing : 4-10M
Ω
(resistance between 2
signal leads)
Resistor
Pin for supporting sleeve > 1M
Ω
Temperature dependence of sensitivity at 9
kHz
≤
-0.04 mV/(g*K)
Sensor Stand alone Diagnosis :
Connector details
1. ECU pin M1C3 : (+ve)
2. ECU pin M1B3 : (-ve)