Monitor GDS Data
■ Check rail pressure data
1.

Connect GDS with "DATA LINK CONNECTOR"(DLC).

2.

Warm engine up to normal operating temperature.

3.

Turn all the electrical devices including air conditioner OFF.

4.

Monitor "FUEL PRESSURE MEASURED", "RAIL PRESSURE REGULATOR" and "INJ. PUMP REGULATOR" parameter on the GDS.

Reference value

Idle (No load)

3000RPM (No load)

FUEL PRESSURE MEASURED

25 ± 5 Mpa(250 ± 50 Bar)

55 ± 10 Mpa(550 ± 10 Bar)

Pressure increases

RAIL PRESSURE REGULATOR(Rail)

25 ± 5%

35 ± 5%

Duty increases

INJ. PUMP REGULATOR(Pump)

40 ± 5%

40 ± 5%

Duty decreases

☞ P-PRV installed on high pressure pump is controlled to reduce duty in order to increase rail pressure at acceleration. (P-PRV operating current decreases) → IF the current decreases, fuel amount to common rail from high pressure increases.

☞ Duty for PRV installed on common rail is increased in order to make rail pressure up at acceleration(PRV Operating current increases) → If the current increases, fuel feeded to common rail return amount is decreased that makes common rail pressure increases.

Яндекс.Метрика