Electric vacuum pump

a vacuum pump and electric technology, applied in the field of vacuum pumps, can solve the problems such as the inability to obtain the negative pressure of the intake pipe of the engine, and achieve the effect of minimizing operation sound or noise and simple structur

Inactive Publication Date: 2014-05-01
AISAN IND CO LTD
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]The electric vacuum pump of the invention, as explained above can be provided wi

Problems solved by technology

Furthermore, for a hybrid vehicle, an electric vehicle, or a vehicle with an idling stop functi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric vacuum pump
  • Electric vacuum pump
  • Electric vacuum pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019]A detailed description of a preferred embodiment of an electric vacuum pump embodying the present invention will now be given referring to the accompanying drawings. The present embodiment shows a case where the electric vacuum pump according to the invention is applied to a brake system.

[0020]Thus, the brake system is firstly explained referring to FIGS. 1 and 2. FIG. 1 is a schematic configuration view of the brake system including the vacuum pump in the present embodiment. FIG. 2 is a block diagram showing a control system of the brake system including the electric vacuum pump in the present embodiment.

[0021]A brake system 1 in the present embodiment includes, as shown in FIGS. 1 and 2, a brake pedal 10, a brake booster 12, a master cylinder 14, a negative pressure sensor 16, an electric vacuum pump 18 (labeled “Electric VP” in the figure), a first check valve 20, a second check valve 22, an ECU 24, an intake pipe pressure detection unit 26, and an engine stop determination...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

An electric vacuum pump includes: a motor part and a pump part placed in a case, and a cover member closing the case from a pump part side. The cover member includes: a suction port for sucking a fluid from pump outside into the pump part; a silencer part including a space part communicating with a discharge outlet of the pump part; and a discharge port for discharging a fluid ejected from the pump part to pump outside. The suction port has an end portion placed in sealingly contact with the pump part to hermetically communicate with a suction inlet of the pump part. The discharge port is formed with a throat part.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2012-236367 filed on Oct. 26, 2012, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a vacuum pump for generating negative pressure to be used in a brake booster of a vehicle such as a motorcar.[0004]2. Related Art[0005]A brake device for vehicle is provided with a brake booster for amplifying a braking force by utilizing negative pressure in an intake pipe (“intake-pipe negative pressure”) of an engine. In recent years, pumping loss is reduced in response to demands for low-fuel consumption and thus the negative pressure in the intake pipe tends to decrease. Furthermore, for a hybrid vehicle, an electric vehicle, or a vehicle with an idling stop function, there is a case where the intake-pipe negative pressure of a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F04B17/03
CPCF04B17/03F04C25/02F04C29/063F04C29/066F04C18/344
Inventor YAMANAKA, SHOTAMAKINO, KATSUHIKOSUGIMOTO, ATSUSHI
Owner AISAN IND CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap