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Electrical pump apparatus

a technology of electric pump and electric motor, which is applied in the direction of positive displacement liquid pump, piston pump, liquid fuel engine, etc., can solve the problems of entering the housing, and achieve the effect of enhancing the degree of failure detection

Inactive Publication Date: 2014-02-06
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about an electrical pump system that can detect failures with higher certainty and prevent the failure detection circuit from becoming inoperative before identifying the problem with the electric system.

Problems solved by technology

When such a sealing member deteriorates with age, for example, rainwater or the like may enter the housing.
As a result, in an electrical pump apparatus in which a control device is integrally formed as described above, there arises the possibility that a failure may be caused by a short circuit which occurs in an electric system that electrically connects an electric power supply (battery) with a motor, or by deterioration of a portion (wiring or the like) of the electric system to which rainwater or the like adheres.

Method used

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Examples

Experimental program
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Effect test

embodiment 1

[0022]As shown in FIG. 1, an electrical pump apparatus 1 includes a housing 2 which is formed into an approximately cylindrical shape. In the housing 2, a pump 3 that generates an oil pressure, a motor 4 that drives the pump 3, and a control device 5 that controls the operation of the motor 4 are integrally housed. In the following description, a one axial end side (the left side in FIG. 1) of the housing 2 is referred to as the front side, and the other axial end side (the right side in FIG. 1) is referred to as the rear side.

[0023]The housing 2 includes: an approximately annular pump case 11; a pump plate 12 which is placed in front of the pump case 11; a cylindrical motor case 13 which is placed in rear of the pump case 11; and a cover 14 which closes a rear opening end of the motor case 13. The pump case 11 and the pump plate 12 are made of a metal material, and the motor case 13 and the cover 14 are made of a resin material. The pump case 11, the pump plate 12, and the motor ca...

embodiment 2

[0055]FIG. 4 shows an electrical pump apparatus of Embodiment 2. Embodiment 2 is configured similarly to Embodiment 1 except the manner of attachment of the control device 5, and therefore detailed description of the portions is omitted.

[0056]In Embodiment 2, the attaching portions are formed so that, in the state where the electrical pump apparatus 1 is attached to the vehicle body, the circuit board 51 is in the horizontal direction. The circuit board 51 is fixed to the motor case 13 and the pump case 11 through the screws 54. The control IC chip 53 is mounted on one surface of the circuit board 51, the power IC chip 52 is mounted on the other surface, and the control IC chip 53 is placed so as to be higher in the direction of gravity than the power IC chip 52. In the embodiment, the position where the plurality of terminals projecting from the power IC chip 52 is at the lowest water level Hmin. The cover 14 is fixed to the pedestal portion 42 of the motor case 13 by other bolts 6...

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Abstract

An electrical pump apparatus is provided in which a situation where a failure detection circuit becomes inoperative before detection of a failure of an electric system can be avoided, and the certainty of failure detection can be enhanced. An attaching portion which is to be attached to a vehicle body is formed so that, in a state where an electrical pump apparatus is attached to the vehicle body, a circuit board of a control device is perpendicular to the horizontal direction. A control IC chip which constitutes a microcomputer for detecting a failure of the electric system is placed on a circuit board so as to be higher in the direction of gravity from a lowest water level Hmin at which flooding in a housing causes the electric system to be short-circuited.

Description

TECHNICAL FIELD[0001]The present invention relates to an electrical pump apparatus which is to be mounted on a vehicle.BACKGROUND ART[0002]In a vehicle provided with a so-called idling stop function which, when the vehicle is temporarily stopped, automatically stops an engine, conventionally, an oil pressure supply to a transmission and the like is ensured even in the case of idling stop, by a use of an electrical pump apparatus. Such an electrical pump apparatus is mounted in a limited space of a vehicle. Therefore, an electrical pump apparatus is strongly requested to be miniaturized. Conventionally, therefore, an electrical pump apparatus has been proposed in which a pump that generates an oil pressure, a motor that drives the pump, and a control device that controls the operation of the motor are housed in a common housing to be integrated with one another, thereby causing the electrical pump apparatus to be miniaturized (for example, see Patent Document 1).[0003]In the case whe...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B17/03
CPCF04B17/03F01C21/007F04B49/06F04B51/00F04B53/16F04C2/10F04C14/28F04C15/008F04C2240/51F04C2240/808F04C2270/10F04C2270/60F04C2270/86
Inventor HIBI, TSUTOMUIMAI, FUKAMI
Owner JTEKT CORP
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