11. EFI SYSTEM OF SQR 472ENGINE
11-30
13. Electric fuel pump
1) Installation position
Through the flange bracket is fixed in the tank,
SW_A Battery
anode
V_BAT
Get an electric shock
SW_B Fuse
pump
---
Supply
Main relay power supply V_RLY
Fuel pump relay
Coil
ON ECU
X1-69
RLY_EFP
Electric fuel pump with two pin, connect the fuel pump relay. Two stitches beside the pump shell
engraved with "+" and "-", respectively connected with positive and negative.
2) Working principle
Electric fuel pump is composed of pump and the end of the DC electric motor, a blade cover
(integrated check valve, pressure relief valve and the electromagnetic interference element) and
other components, see below.
Pump and motor are coaxially arranged, and closed in the same chassis. Around the pump and
motor shell are filled
Full of gasoline, the fuel cooling and lubrication. The battery to the electric fuel pump relay power
supply, relay
Only when in starting and running of the engine makes the electric fuel pump circuit. When the
engine is stopped by accident
When running, automatic stop fuel pump.
Graph: electric fuel pump profile
Electric fuel pump outlet pressure by the pressure relief valve, between 450 and 650kPa. But the
pressure in the fuel system from the fuel pressure regulator, 380kPa. According to the need of
engine, electric fuel pump can have different flow. For the convenience of production, the same
structure of the EKP13 series of electric fuel pump by adjusting step coils adjust the speed of the
Summary of Contents for Vyper 4WD 1100cc 4 seater XY1100UEL
Page 1: ...Service Manual 4 4 GIO MOTORS Vyper 4WD 1100cc Vyper 4WD 1100cc 4 seater ...
Page 65: ...4 COOLING SYSTEM 4 6 Cooling System Chart 4 ...
Page 175: ...11 EFI SYSTEM OF SQR 472ENGINE 11 3 3 The ECU control principle diagram ...
Page 176: ...11 EFI SYSTEM OF SQR 472ENGINE 11 4 4 The ECU function module layout ...
Page 258: ...12 LIGHTING AND SWITCHES 12 7 2WD 4WD 4WD Diff Lock Switch No continuity Change the switch ...
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