gio Vyper 4WD 1100cc 4 seater XY1100UEL, Руководство по обслуживанию

Страница: 192 / 261

11. EFI SYSTEM OF SQR 472ENGINE
11-20
The exhaust pipe of the request: to make the exhaust gas oxygen sensor in front region of the tube rapid heating. If
possible, the exhaust pipe should be designed to tilt, in order to avoid condensation water together in the front area
of the sensor.
Do not use cleaning fluid, oily liquids or volatile solids in the plug of the oxygen sensor.
Cannot use impact wrench fastening sensor.
Thread the oxygen sensor for M18 1.5-6e.
The six angle of the head size of oxygen sensor for 21.67~22.
Tightening torque 34~44Nm oxygen sensor.
5) Fault phenomenon and judgment method
Fault phenomenon: idling bad, bad acceleration, exhaust, fuel consumption is too large, exceed the standard.
Common fault: 1, 2 more than life, engine oil burning, causes the sensor surface area carbon 3, wet water vapor
inside the transducer, a temperature change, probe fracture; 2, oxygen sensor "poisoning". (Pb, S,
Br, Si)
Repair note: prohibit the use of cleaning liquid, oily liquids or volatile solids in the oxygen sensor in repair.
A simple method to measure:
(Remove connector) digital multimeter to Ohm, two probes are respectively connected sensor 1# (white), 2#
(white) pin, room temperature (23 ± 5
℃
) under the resistance of 5.4~6.6.
(Connect the connector) under idling state, the oxygen sensor at the working temperature of 350
℃
, the digital
multimeter to the DC voltage, two probes are respectively connected sensor 3# (grey), 4# (black) pin, the voltage
should be in the rapid fluctuation between 0.1-0.9V.
8. The intake air temperature and absolute pressure sensor
1) Structure diagram and pin
2) Installation position
The sensor consists of two sensors, intake manifold absolute pressure sensor and the inlet temperature sensor
assembly, is installed in the
The intake manifold.
3) Working principle
Intake manifold absolute pressure sensor element consists of a silicon chip. A pressure diaphragm etched on the
silicon chip. The pressure diaphragm has 4 piezoelectric resistance, the 4 piezoelectric resistance as the strain
components into a Wheatstone bridge. The silicon chip in addition to the pressure diaphragm, also has an
integrated signal processing circuit. The silicon chip with a metal shell to form a closed reference space, gas
reference space of the absolute pressure is close to zero. Thus forming a microelectronic mechanical system.
Active surface silicon chip has a close to zero pressure, its back through the manifold through a pipe into the test
tube, the absolute pressure. The silicon chip thickness of only a few microns (m), so the intake manifold absolute
pressure change makes silicon chip mechanical deformation, 4 piezoelectric resistance followed by deformation,
the resistance value change. By processing the signal processing circuit of silicon chips, forming the linear
relationship between the voltage signals and pressure. Intake air temperature sensor element is a negative
temperature coefficient (NTC) resistor, the resistance changes with the intake air temperature sensor, the
transmission to the controller a voltage representing the intake air temperature change.