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M162 ENGINE CONTROLS 1F1 -- 55 DAEWOO MY_2000 The pressure difference between the fuel pressure and the intake manifold is about 3.8 bars during the full load. YAA1F500 1. Fuel Pressure Regulator 2. Intake Manifold 3. Fuel Return (to fuel tank) 4. Fuel Supply (from fuel pump) 5. Fuel Pressure (approx. 3.8 bars) 6. Intake Manifold Negative Pressure (0 bar) <Operating at Idle and partial load> ifold with the vacuum hose at the intake pipe connection (7). The negative pressure generated in the intake man- ifold activates the diaphragm, and thus the fuel pressure gets reduced to the rate of the operating extent of the diaphragm by the intake manifold’s negative pressure. YAA1F510 Consequently, the fuel pressure in the fuel distributor changes by the intake manifold’s negative pressure, and the injector’s fuel pressure gets reduced independently to the throttle valve’s position. Thus, the fuel injection volume can only be determined according to the injec- tor’s injecting duration. the intake manifold is approx. 3.2 bars during idling. YAA1F520 1. Fuel Pressure Regulator 2. Intake Manifold 3. Fuel Return (to fuel tank) 4. Fuel Supply (from fuel pump) 7. Fuel Pressure (approx. 3.2 bars) 8. Intake Manifold Negative Pressure (0.6 bars) <Fuel Pressure Diagram> YAA1F530 A. Fuel pressure B. Intake Manifold Negative Pressure LL. Idling TL. Partial load VL. Full load |