The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 2017
Filed:
Jun. 02, 2015
Denso Corporation, Kariya, Aichi-pref., JP;
Hidetoshi Ooiwa, Anjo, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
In an evaporation fuel processing apparatus, a canister holds an evaporation fuel evaporated in a fuel tank, a purge passage communicates with the canister and an intake passage of an engine, a purge pump disposed in the purge passage pressurizes and feeds an air in the canister toward the intake passage, a bypass passage disposed in the purge passage bypasses the purge pump, and an on-off valve disposed in the purge passage opens and closes the bypass passage. When an intake negative pressure of the intake passage is low, the purge pump is activated, and the bypass passage is closed by the on-off valve. When the intake negative pressure of the intake passage is not low, the purge pump is stopped, and the bypass passage is open by the on-off valve.