Fuel pump apparatus for internal combustion engine

Patent · Tue Sep 08 04:00:00 EDT 1987

OSTI ID:5831647

Matsuda, T; Miyamoto, M; Takei, T

This patent describes a fuel pump to be positioned in a fuel tank of an internal combustion engine. The fuel pump has a pump housing and an upright drive shaft, comprising: (1) a first stage pump section including (a) a first pump passage formed in the pump housing and communicated at one end with an inlet port of the pump housing; (b) a first impeller operatively connected to the shaft and operatively arranged in the first pump passage for separating, during rotation, fuel vapor from liquid fuel, (2) a second stage pump section including (c) a second pump passage formed in the pump housing and communicated at one end to the other end of the first pump passage and at the other end to an outlet port of the pump; (d) a second impeller operatively arranged in the second pump passage and operatively connected to the first impeller for further pressurizing the liquid fuel supplied from the first pump passage. The second impeller has a large diameter than the first impeller. The second impeller is arranged at a vertically upper side of the first impeller; (e) a vapor discharge port formed in the second impeller at a radially inward portion facing the first impeller and communicated at a vertically lower side with the radial inward portion of the first pump passage; and (f) a vapor discharge passage formed upwardly and radially in the pump housing for communicating a vertically upper side of the vapor discharge port with the outside of the pump within the fuel tank.

• Assignee: Nippondenso Co., Ltd., Kariya
• Patent Number(s): US 4692092
• OSTI ID: 5831647
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CENTRIFUGES
CONCENTRATORS
CONTAINERS
DESIGN
ENGINES
FINS
FLUID FLOW
FLUIDS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
GAS FLOW
GASES
HEAT ENGINES
INSTALLATION
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
OPERATION
POSITIONING
PUMPS
SHAFTS
TANKS
VAPORS