Ejector and negative pressure supply apparatus for brake booster using the ejector

An ejector including a nozzle communicating with a fluid inlet, a diffuser communicating with a fluid outlet, and a decompression chamber placed between the nozzle and he diffuser. The ejector is arranged to generate a negative pressure in the decompression chamber by a fluid ejected from the nozzle...

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Bibliographic Details
Main Authors NISHITANI TSUTOMU, KAWAMORI YUTAKA, ITO YOSHIKI, TSUKIJI KIYOSHI
Format Patent
LanguageEnglish
Published 29.05.2008
Subjects
ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL
BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
PERFORMING OPERATIONS
PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES
TRANSPORTING
VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF
VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
VEHICLES IN GENERAL
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Summary:An ejector including a nozzle communicating with a fluid inlet, a diffuser communicating with a fluid outlet, and a decompression chamber placed between the nozzle and he diffuser. The ejector is arranged to generate a negative pressure in the decompression chamber by a fluid ejected from the nozzle. A target negative pressure P in the decompression chamber is set in a range of "40 kPa<P<=50 kPa". A SD/Sd ratio between a sectional area SD of an inlet of the diffuser and a sectional area Sd of an outlet of the nozzle is determined to meet a relation: "1.20<=SD/Sd<=4.08-0.047P".
Bibliography:Application Number: US20070976412