Patent · US Expired

Solenoid valve

US6715700B2 · kind B2 · utility

4Cited by

8References

4Claims

0Family size

Assignee

Sumitomo (SEI) Brake Systems, Inc. · CM

Inventors

Koichi Okamura · Tokyo, JP
Keita Nakano · Takamatsu, JP

Key dates

Filing date	Apr 9, 2002
Grant date	Apr 6, 2004
Priority date	—
Expiry date	Apr 9, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16K31/0665
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A poppet type solenoid valve used in an electronically controllable vehicle hydraulic brake system is proposed which suppresses sound and vibration and simultaneously eliminates malfunction.For these effects, the following conditions have to be satisfied:FSP/(r2−B2)<67  (1) FSP·St2/(r2−B2)>29  (2) wherein FSP is the force of the spring, r is the tip diameter of the poppet, St is the stroke of the poppet, and B is the diameter of the area of the poppet where the valve-opening force by hydraulic pressure does not work on the poppet under the Bernoulli effect.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.