Modular fuel sender for motor vehicle
A modular fuel sender disposed in a fuel tank of a motor vehicle is described comprising: a reservoir in the fuel tank having a top defining an over flow fuel level of the reservoir, a high pressure pump having an inlet in the reservoir and discharge connected to an engine of the vehicle, a low pressure conduit means conducting return fuel from the engine to the reservoir, a secondary pump having a discharge in the reservoir and an inlet, means defining a recirculation flow path between the reservoir and the secondary pump inlet, means defining a new fuel flow path from the fuel tank to the secondary pump inlet, and control means connected to the recirculation flow path and to the new fuel flow path responsive to a reservoir fuel level and to a fuel tank new fuel level to effect a recirculation mode of secondary pump operation wherein the recirculation flow path is blocked and unblocked to maintain the reservoir fuel level below the overflow level when the fuel tank new fuel level is above a predetermined low level and to effect a scavenge mode of secondary pump operation wherein the recirculation flow path is continuously blocked when the reservoir fuel level is above and below the overflow fuel level when the fuel tank new fuel level is below the predetermined low level to thereby maximize scavenging of new fuel from the fuel tank.
- Assignee:
- General Motors Corp., Detroit, MI (United States)
- Patent Number(s):
- A; US 5218942
- Application Number:
- PPN: US 7-983339
- OSTI ID:
- 6465766
- Country of Publication:
- United States
- Language:
- English
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