Evaporative emission storage canister with integral filter and vent solenoid
First Claim
1. An evaporative emission storage canister having a flow path therethrough, comprising:
- a) a housing;
b) means within said housing in said flow path for adsorbing and desorbing evaporative fuel emissions;
c) a solenoid valve within said housing including an armature having a valve head slidable in a perforate barrel and a valve seat supported by said perforate barrel, for regulating the flow of air along said flow path, said valve being disposed in said flow path such that engine vacuum applied to said adsorbing and desorbing means assists in opening said valve; and
d) a filter element for filtering air entering said valve.
2 Assignments
0 Petitions
Accused Products
Abstract
Onboard refueling vapor recovery canister for a gasoline-powered vehicle including an unequally-divided carbon bed, a vent solenoid, and a high-capacity, self-cleaning vent filter. Integral configuration of the canister reduces its size and also increases the allowable carbon volume over prior art canisters, permitting use of a lower grade carbon at a significant cost savings while meeting all working capacity requirements. The filter box has an air inlet port and contains a high-efficiency filter wrapped around a feature enclosing a solenoid for opening and closing the air flow through the canister. Wrapping the filter increases the available surface area by more than 50% over that of a flat filter. Outward air flow during refueling partially backflushes the filter, thereby extending the useful life of the filter media. The carbon absorber is divided into two sequential beds of unequal length but equal cross-sectional area, which improves the diurnal efficiency performance of the canister relative to known canisters.
-
Citations
20 Claims
-
1. An evaporative emission storage canister having a flow path therethrough, comprising:
-
a) a housing;
b) means within said housing in said flow path for adsorbing and desorbing evaporative fuel emissions;
c) a solenoid valve within said housing including an armature having a valve head slidable in a perforate barrel and a valve seat supported by said perforate barrel, for regulating the flow of air along said flow path, said valve being disposed in said flow path such that engine vacuum applied to said adsorbing and desorbing means assists in opening said valve; and
d) a filter element for filtering air entering said valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. An evaporative emissions storage canister having an integral configuration and a flow path therethrough, comprising:
-
a) a housing;
b) means located within said housing in said flow path for adsorbing and desorbing evaporative fuel emissions;
c) a solenoid valve integrally located within said housing for regulating the flow of air along said flow path;
d) a filter box integrally located within said housing for filtering air entering said solenoid valve, wherein said filter element is non-planar. - View Dependent Claims (15, 16, 17)
-
-
18. An evaporative emissions storage canister having an integral configuration and a flow path therethrough, comprising:
-
a) a housing;
b) means located within said housing in said flow path for adsorbing and desorbing evaporative fuel emissions;
c) a solenoid valve integrally located within said housing for regulating the flow of air along said flow path;
d) a filter box integrally located within said housing;
e) a filter element integrally located within said filter box for filtering air entering said solenoid valve, wherein said filter box includes a feature comprising an outer surface having a plurality of protuberances located thereon for supporting said filter element and maintaining an air flow passageway between said filter element and said feature, the outer surface of said feature being semi-cylindrically shaped. - View Dependent Claims (19, 20)
-
Specification