CS35 2013.04
3.1.13-11 3.1.13-11Electronic Control System - ME7
Throttle opening feedback signal is provided by
two potentiometers that integrated in the throttle
body. Their power supply and grounding are com-
mon, provided by the engine module.
Throttle position sensor is consisted of carbon
composition resistor and sliding pointer. It is a
linear output angle sensor, which is composed of
two arc - shaped sliding contact resistors and
two sliding contact arms. The revolving shaft of
the sliding contact arm connected to the same
shaft with the throttle shaft. Sliding contact resis-
tor is with 5 V power supply voltage at both ends
.
When the throttle rotates, the sliding contact arm
rotates also, at the same time move along the
sliding contact resistor, and will lead out the elec-
trical potential of the contact point as output volt-
age. So it is actually proportional a voltage signal
that of corner potentiometer, potentiometer output
and throttle position.
Throttle drive motor is a mini motor. The motor
drives a particular gear sector and a two - way
spring, when the system is in power off state, the
opening of throttle is guaranteed by this section to
maintain at the position that greater than idle
speed position, which however can not place at a
too high security position , to guarantee that the
vehicles have the ability to continue the driving, if
the engine control system steps into the failure
mode, step on the accelerator pedal, the elec-
tronic throttle body of the valve plate will not
move.
Knock Sensor
The knock sensor is directly installed on the
engine cylinder body and under the lower air
intake manifold. Knock sensor will record the
increased vibration when the engine body
increases the combustion noise. ECM using the
knock sensor signal to avoid fuel pre - ignition
through adjusting the ignition and fuel supply
characteristics.
Oil Control Valve
Oil control valve is installed on the right side of
engine cylinder head . The oil control valve is con-
trolled by the duty cycle signal of EMS to change
the direction of oil circuit of VVT unit, thus chang-
ing the phase of VVT unit's camshaft and chang-
ing the valve timing.
M
+5V
TPS1TPS1
TPS2
Ground
Motor Control
Motor Control
TPS2
A3113008
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