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Turbine type fuel pump

A fuel pump and turbine technology, applied in the field of turbo fuel pumps, can solve the problems of reducing pump efficiency and increasing torque loss

Inactive Publication Date: 2008-04-02
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to an increase in torque loss over a relatively large flow rate range, creating a problem of reduced pump efficiency

Method used

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  • Turbine type fuel pump
  • Turbine type fuel pump
  • Turbine type fuel pump

Examples

Experimental program
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Embodiment Construction

[0040] A turbo fuel pump embodying the present invention will be described with reference to the drawings.

[0041] Referring to Figures 1-7, a first embodiment of the present invention is shown. Referring to FIG. 1, the turbo fuel pump has a cylindrical casing 1 which constitutes the casing of the pump and has axial ends closed by a delivery cover 2 and a pump housing 9. Referring to FIG.

[0042] A capped cylinder delivery cap 2 is fitted at one end of the housing 1 . As shown in FIG. 1 , the delivery cover 2 is provided with a delivery pipe 2A and a connector 2B protruding upward, and a bearing sleeve 2C extending downward at the center.

[0043] A check valve 3 is installed in the delivery pipe 2A for maintaining residual pressure. During the rotation of the electric motor 7, the check valve 3 is opened by the fuel flowing into the housing 1, so that the fuel can be pressed from the delivery pipe 2A into an external fuel pipe (not shown). When the motor stops, the check...

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PUM

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Abstract

A turbine fuel pump includes an impeller having blades, each including a linear blade portion extending linearly in the radial direction of the impeller and a curved blade portion extending circularly curvedly from the head of the linear blade portion to the forward side of the impeller as viewed in the direction of rotation of the impeller. The linear blade portion has a length of (1 / 3 to 2 / 3)xH, where H is an overall length of the impeller.

Description

[0001] This application is a divisional application of the invention patent application with application number 03136325.3. The filing date of the original application was May 28, 2003, and the title of the invention was "turbine fuel pump". technical field [0002] The invention relates to turbo fuel pumps suitable for use, for example, in delivering fuel to injection valves and the like of motor vehicle engines. Background technique [0003] Usually, in order to deliver fuel to the engine, an electronically controlled fuel injection system is installed on the passenger car. The fuel injection system has an injection valve that injects fuel into the combustion chamber of the engine, and delivers the fuel in the fuel tank, such as at the rear of the vehicle, to the injection valve for the fuel pump. Recently, there has been an increased demand for improvement in fuel consumption of vehicles due to social demands for global environmental protection. Therefore, an important ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M37/04F04D5/00F02M37/08F04D29/24
Inventor 本岛淳一饭岛正昭
Owner HITACHI LTD