Fuel pump for high-pressure fuel injection system
AssigneeZexel Corporation
InventorsTakeo Kushida, Hideya Kikuchi, Etsuro Hozumi
Life of this patent
Estimating the term…
Abstract
A fuel pump for a high-pressure fuel injection system is constituted by integrating into a single pump unit 15 a high-pressure fuel pump 4 for supplying high-pressure fuel to injectors 8 for injecting high-pressure fuel into cylinders of an engine 16 and a solenoid valve unit 6 for controlling the fuel pressure of the high-pressure fuel pump 4, and the pump unit 15 is adapted for mounting on the engine. The configuration decreases required installation space, enables use of a common heat installation system and reduces the number of installation steps.
Claims10
A fuel pump for a high-pressure fuel injection system comprising:
- a high-pressure fuel pump for supplying high-pressure fuel to injectors for injecting high-pressure fuel into cylinders of an engine,
- a pressure control valve for controlling the fuel pressure of the high-pressure fuel pump,
- the high-pressure fuel pump and the pressure control valve being integrated to constitute a pump unit,
- the pump unit being adapted for mounting on the engine,
- the high pressure fuel pump has a cover, a pump housing and a flange, and
- the pressure control valve has a unit housing,
- the unit housing of the pressure control valve and the cover of the high-pressure fuel pump being constituted integrally,
- clustered on a side of the pump unit separate from the flange of the high-pressure fuel pump are
- a supply pipe connector for connecting a fuel supply pipe from a fuel tank for the fuel,
- a low-pressure side outlet port for connecting a fuel return pipe passing from the high-pressure control valve to the fuel tank,
- a high-pressure supply pipe connector for connecting a high-pressure fuel supply pipe passing from the pump unit to the injectors, and
- a high-pressure side inlet port for connecting a high-pressure fuel control pipe passing from the injectors to the pump unit.
A fuel pump for a high-pressure fuel injection system comprising:
- a high-pressure fuel pump for supplying high-pressure fuel to injectors for injecting high-pressure fuel into cylinders of an engine,
- a pressure control valve for controlling the fuel pressure of the high-pressure fuel pump,
- the high-pressure fuel pump and the pressure control valve being integrated to constitute a pump unit,
- the pump unit being adapted for mounting on the engine, wherein
- the pump unit is adapted for connection to the injectors by metal fuel pipes,
- the pressure control valve is a high-pressure control valve having a unit housing,
- a solenoid valve and a filter are further provided in the unit housing together with the high-pressure control valve, and
- the solenoid valve is disposed near the side of the unit housing portion to which the fuel pipe is connected, thereby securing a filter installation space for the filter.
A fuel pump for a high-pressure fuel injection system comprising:
- a high-pressure fuel pump for supplying high-pressure fuel to injectors for injecting high-pressure fuel into cylinders of an engine,
- a pressure control valve for controlling the fuel pressure of the high-pressure fuel pump, the pressure control valve is a high-pressure control valve having a unit housing,
- the high-pressure fuel pump and the pressure control valve being integrated to constitute a pump unit and
- the pump unit being adapted for mounting on the engine,
- a high-pressure side passage, a low-pressure side passage and a solenoid valve are further provided in the unit housing, the high-pressure control valve and the solenoid valve are disposed across the high-pressure side passage and the low-pressure side passage, and the solenoid valve is adapted to establish and shut off communication between the high-pressure side passage and the low-pressure side passage, this arrangement constituting a solenoid valve unit, and
- the solenoid valve unit and the high-pressure gasoline pump are integrated to constitute the pump unit.
A fuel pump for a high-pressure fuel injection system comprising:
- a high-pressure fuel pump for supplying high-pressure fuel to injectors for injecting high-pressure fuel into cylinders of an engine,
- a pressure control valve for controlling the fuel pressure of the high-pressure fuel pump,
- the high-pressure fuel pump and the pressure control valve being integrated to constitute a pump unit, the pump unit being adapted for mounting on the engine, wherein the pump unit further comprises a heat insulation system and is adapted for mounting on the engine through the medium of the heat insulation system.
Dependencies are inferred from the claim text.