Fuel supply system HFM-SFI function

GF07.51-P-3004D

12.6.96

ENGINE 104.941 up to 31.7.96
except CODE (491) as of Model Year 97 USA version
except CODE (498) as of Model Year 97 Japanese version

ENGINE 104.942 /945 /992

ENGINE 104.943 /944 /991 /994 up to 31.7.96

ENGINE 104.995 except CODE (491) as of Model Year 97 USA version

ENGINE 111.921 /942 up to 31.8.98

ENGINE 111.945 up to 31.8.98 in MODEL 202.020 /080

ENGINE 111.945 up to 31.5.98 in MODEL 208.335

ENGINE 111.946 up to 31.5.98

ENGINE 111.960 /961 /970 /977

ENGINE 111.944 /975 up to 31.7.96

ENGINE 111.974

except CODE (491) as of Model Year 97 USA version
except CODE (498) as of Model Year 97 Japanese version

15.03.07

The document has been updated to this date

and will no longer be subject to revision.

P07.51-0463-06

Design with 1 fuel pump

Shown on engine 111

17 Fuel rail

40 Diaphragm pressure regulator

51 Pressure measuring connection

55 Fuel filter

75 Fuel tank

M3 Fuel pump

Y62 Fuel injection valve

P07.51-0464-06

Design with 2 fuel pumps

Shown on engine 104

17 Fuel rail

40 Diaphragm pressure regulator

51 Pressure measuring connection

55 Fuel filter

75 Fuel tank

M3m1 Fuel pump 1

M3m2 Fuel pump 2

Y62 Fuel injection valve

Task

Providing an adequate quantity of filtered fuel from the fuel tank in all operating conditions and at an adequate pressure (injection pressure) to the fuel injection valves (Y62) for injection.

Function

When the engine is running, fuel is drawn from the fuel tank (75) by the fuel pump (M3 or M3m1, M3m2) and pumped through the fuel filter (55) to the fuel injection valves (Y62) connected to the fuel rail (17). The fuel pressure (injection pressure) is regulated by the diaphragm pressure regulator (40) as a function of the intake manifold pressure.

Excess fuel supplied flows back pressureless from the diaphragm pressure regulator (40) to the fuel tank (75). As a result of this circulation, relatively cool fuel is always available for injection (to avoid a formation of vapor bubbles).

The fuel injection valves (Y62) actuated by the HFM-SFI control module (N3/4) spray the fuel in a finely atomized spray into the intake port.



As a result of the arrangement of the fuel pumps (M3m1, M3m2) (connected to each other in line), each fuel pump produces half the fuel pressure (injection pressure).

	HFM-SFI control module position / task / design / function		GF07.51-P-4103D
	Fuel pump position / task / design / function	Roller cell pump	GF47.20-P-4003A
		Screw spindle pump	GF47.20-P-4003L
	Suction spray pump position / task / design / function	Model 202, 208	GF47.10-P-3102E
	Fuel delivery module position / task / design / function	Model 163	GF47.20-P-4101GH
	Fuel filter position / task / design / function		GF47.20-P-4004L
	Fuel filter with integrated fuel pressure regulator position / task / design / function	Model 163	GF47.20-P-4100A
	Diaphragm pressure regulator position / task / design / function		GF07.17-P-4106F
	Fuel rail		GF07.61-P-3101F
	Fuel injector position / task / design / function		GF07.03-P-5004F
	Overvoltage protection relay	Model 124, 202 up to 7/96	GF54.10-P-4100A
	Relay module position / task / design / function	Model 210, 170	GF54.10-P-4033K
	Base module position / task / design / function	Model 129, 140	GF54.21-P-4013L
	Fuse and relay module	Model 202 as of 8/96, model 208
	Fuel pump relay position / task / design / function	Model 124	GF54.15-P-4105D
		Model 129, 140, 170, 202, 208, 210	GF54.15-P-4105L
	Fuel tank	Model 124
		Model 129
		Model 170
		Model 140
		Model 163	GF47.10-P-3000GH
		Model 202, 208	GF47.10-P-3000E
		Model 210	GF47.10-P-3000B

Odkazované dokumenty