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Fuel supply device

A fuel supply device and fuel technology, which is applied to liquid fuel feeders, electromechanical devices, charging systems, etc., can solve the problems of increasing the rigor of precision management of parts, increasing processing costs, abnormal noise, etc., to prevent wear and tear and Effects of overheating, improved stability, and reduced sliding loss

Inactive Publication Date: 2011-05-11
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the fuel supply device of Patent Document 1, since the recesses serving as flow passages are formed in many places in the axial direction on the sliding surface between the inner surface of the bearing and the shaft, fine machining is required to ensure the accuracy of the bearing, resulting in an increase in machining cost. Increase and need to increase the rigor of precision management of parts
In addition, since the sliding surface between the bearing and the shaft becomes discontinuous due to the recess, there is also a problem that it is likely to cause vibration and abnormal noise of the rotor during rotation.
[0007] In addition, in the electric water pump of Patent Document 2, since the fluid supply passage is inclined at a predetermined angle with respect to the direction of the rotor axis, there is a problem that it is necessary to process holes inclined toward the magnet, which increases the processing cost.

Method used

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Experimental program
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Embodiment approach 1

[0021] figure 1 It is a block diagram of the fuel system used for the fuel supply apparatus of this invention. The fuel supply device 2 is driven by a drive signal from the control unit 5, and the fuel supply device 2 sucks fuel from the fuel tank 1 through a filter and discharges it. The discharged fuel is adjusted to a predetermined pressure by the pressure regulator 3 and supplied to the fuel injection device 4 via a high-pressure fuel pipe. The fuel injection device 4 controls the injection timing and injection amount according to the engine speed and load, etc., to inject fuel into the intake pipe by means of a drive signal from the control unit 5 .

[0022] figure 2 It is a cross-sectional view showing the structure of the fuel supply device 2, and the fuel supply device 2 is composed of a motor unit 2A and a pump unit 2B. The motor unit 2A has a stator 9 composed of a stator core 7 arranged along the inner periphery of the bracket 6 and a plurality of stator coils 8...

Embodiment approach 2

[0036] The fuel supply device according to the second embodiment defines the positional relationship between the position of the fuel passage 14 provided in the rotor 10 and the plate 26 attached to the shaft 11 , and the other configurations are the same as those of the first embodiment.

[0037] Figure 5 (a) is a plan view of the end of the rotor 10, Figure 5 (b) is viewed from the direction of the arrow Figure 5 (a) Cross-sectional view of the D-D line cross-section. Such as Figure 5 As shown, in the structure of the second embodiment, the fuel passage 14 and the guide groove 15 are arranged symmetrically with respect to the line 35 connecting the upper dead center 33 and the lower dead center 34 of the plate 26 inclined on the shaft 11 and at equal intervals. According to this arrangement, by providing the fuel passage 14 and the guide groove 15, there is an effect that the motor does not vibrate when it rotates.

Embodiment approach 3

[0039] The fuel supply device according to the third embodiment is characterized by the formation position of the fuel passage 14 , and the other structures are the same as those of the first embodiment.

[0040] Figure 6 (a) is a sectional view of the rotor 10, Figure 6 (b) is viewed from the direction of the arrow Figure 6 (a) The sectional view of the section of line C-C, Figure 6 (c) is viewed from the direction of arrow D Figure 6 (a) Front view. Such as Figure 6 As shown, in the structure of the third embodiment, the fuel passage 14 is formed on the inner peripheral surface of the annular magnet 12 . The non-magnetic support body 13 is formed in a bobbin shape similarly to the first embodiment, and a guide groove 15 communicating with the fuel passage 14 is formed on one end surface thereof. In addition, the inclined surface 16 is also formed in the same manner as in the first embodiment.

[0041] In the case where the rotor 10 is formed by using the magnet ...

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Abstract

The invention provides a fuel supply device capable of improving the lubricity of the bearing of a motor, which has a stable fuel pressure and high reliability.According to the device, a pump part (2B) is driven by a motor part (2A).The inhaled fuel is pressurized and then is discharged by the pump part (2B).The motor part (2A) comprises a stator (9), a rotor (10) arranged opposite to the stator (9), a bottomed cylindrical partition body (17) separating the stator (9) from the rotor (10) and a bearing (20). The stator (9) is equipped with a support (6), an iron core (8) and a coil wound on the iron core (7). The rotor (10) rotates relative to a shaft (11).The partition body (17) communicates with the pump part (2B) and is filled with fuel. The bearing (20) arranged at the bottom of the partition body (17) supports one end of the shaft (11) of the rotor (10). The rotor (10) is equipped with a plurality of fuel path (14) penetrating the rotor (10) parallel to the shaft (11).

Description

technical field [0001] The present invention relates to a fuel supply device for supplying fuel to, for example, a fuel injection device of an internal combustion engine. Background technique [0002] Regarding the fuel supply device, in the fuel supply device disclosed in Patent Document 1, the stator and the control device are accommodated in a bottomed case, and a plurality of recesses are provided on the inner peripheral surface of the bearing arranged in the back of the case, and this is referred to as fuel passage. [0003] In addition, although it is not a fuel supply device, for example, Patent Document 2 discloses an electric water pump having a structure that separates the fluid from the stator, and is used to counteract the impeller on the opposite side of the impeller disposed inside the spacer body. A fluid supply passage for lubricating the bearing is provided in the rotor magnet. [0004] Patent Document 1: Japanese Patent No. 3402330 [0005] Patent Docume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M37/08F04B17/04H02K7/14
CPCF04B17/03F04B1/141F04B1/145
Inventor 瓜生拓也大西善彦
Owner MITSUBISHI ELECTRIC CORP
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