Tank fill vapor control,申请号US19740461010-传众专利搜索

Tank fill vapor control

申请公布号：US3884204(A)

申请号：US19740461010

申请日期：1974.04.15

申请公布日期：1975.05.20

申请人：

GENERAL MOTORS CORPORATION

发明人：KRAUTWURST, HOMER V.;SCHULITZ, CRISTIAN F.

分类号：B60K15/035;B60K15/04;F02M25/08;(IPC1-7):F02M25/08

主分类号：B60K15/035

摘要：A vapor loss control system for a vehicle fuel supply system includes a first vapor recovery circuit from a vapor space of a gas tank to an air purged canister having a first predetermined volume of vapor adsorbing active material; and wherein the outlet of the canister is connected to a ported vacuum connection in a carburetor for selectively purging said first canister during each engine operation at a rate to purge said first canister for subsequent recovery of vapors. The system further includes a second vapor recovery circuit with second larger volume vapor adsorbing canister in communication with a normally closed, unrestricted vent port on the filler neck of the tank which is opened during fuel fill operation to direct tank vapors into the second canister; and wherein means including a flow restrictor communicate the outlet of the second larger volume canister with the intake manifold to produce a rate of recovery of vapors from the second canister sufficient to purge it between tank fill operations without excessive enrichment of fuel flow into the intake manifold.