Linhai ATV 500-D T3 EFI, Service Manual

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CHAPTER 3 ENGINE
LH500ATV-D T3 EFI SERVICE MANUA 19.0
CHAPTER 3 ENGINE PAGE. 3- 130
3.6.2.5
Intake AirPressure and Temperature Sensor(MAP&MAT)
3.6.2.5.1 Description and Working Principle
This sensor has two functions. The first is the intake manifold air temperature, it
provides a resistance that varies as a function of temperature within prescribed
tolerance limits. The second is the intake manifold air pressure; it provides a
voltage varies as the intake air pressure.
3.6.2.5.2 Appearance
The appearance of the MAP&MAT Sensor is shown as above.
3.6.2.5.3 Operating Environment
This device is intended for use in inlet manifold for sensing air temperature and
pressure which shall withstand such an under hood environment.
Pressure Range: 20~102kPa
Temperature Range: -40~105°C
Relative Humidity: 0 to 100% RH.
Extreme Operating Environment: Maximum temperature excursion to 125°C for
2 hours.
3.6.2.5.4 Storage Environment
Storage temperature: -50°C to 150°C for an indefinite duration
3.6.2.5.5 Electrical Environment
Typical Voltage: The sensor circuit operates with a DC voltage reference of 5 ±
0.1 VDC.
3.6.2.5.6 Sample Cleaning
When necessary the samples may be cleaned in isopropyl alcohol or gasoline
for one minute with mating connectors in place and then air-dried
3.6.2.6
Oxygen Sensor
3.6.2.6.1 Description and Working Principle
This sensor is a device for monitoring the residual oxygen in the exhaust of an
internal combustion engine. It consists of the wide range sensor and stoichiometric
sensor. Usually we use stoichiometric sensor on the small engine. It is the
feedback element for engine closed loop control.
3.6.2.6.2 Appearance
The appearance of the Engine Oxygen Sensor is shown as below