SENSOR UNIT IN SUPRA 125 PGM FI

Oleh Mbah Med

Minggu, 18 Desember 2011

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On motorcycles 125 injection supra, at throtle body there areseveral sensors, including :

IAT (intake water temperature) sensor, which serves to measure the temperature of air entering into the throtle body.
MAP (manifold absolute preasure), serves to detect the pressure of air entering into the throtle body
TP (throtle position senson). function detects how opening the gas valve

The third sensor will provide further input to the ECU to the ECU will determine how the amount of fuel must be injected. so that later expected to approach the ideal mixture.Why should air temperature sensor?. This is necessary because the air density at different cold and when hot, so the number of hot and cold air entering the combustion chamber will be different. to the ECU needs to know the temperature ofincoming air, so that the amount of gasoline that is sprayed in conformity with the amount of incoming air.Why should the MAP?, it is clear here map measures the amount of air entering by air pressure. This type of D-type injectionjetronik.

when we are driving on the road uphill, or a heavy load, we willopen up quite a lot of gas, automatic gas valve opens too much,but we're not running fast.
This condition is different from when we walk fast on straightroads, of course, the opening of the gas is not as much as if we walk slowly with a full load.

The third sensor will provide input to the ECU about the conditions of temperature, engine load conditions, to further ECU will determine how the amount of fuel must be injected. so that laterexpected to approach the ideal mixture.

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