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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||123/587 ; 123/327|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 5 인용 특허 : 1|
Devices are shown and described for attachment to an engine\s intake manifold to regulate its vacuum for fuel economy. The device maintains smooth engine operation by employing multiple valves, each of which provides a supplemental flow of air to the intake manifold during a particular engine mode. Thus, during an idle mode one individually settable valve is operative to supply additional air to the intake manifold to maintain its vacuum at a precisely selected level referenced to an engine idle mode while during deceleration, when a high volume of air i...
A device responsive to a vacuum in an intake manifold of an internal combustion engine for improving fuel economy by controlling said intake manifold vacuum during a plurality of different engine operating modes, each of which has a characteristic range of vacuum levels, comprising: a first normally closed control valve adapted when opened to provide a first supplemental air source to said intake manifold during at least a first engine mode; a second normally open control valve adapted when opened to provide a second supplemental air source to said intak...