ACTIVE PURGE PUMP SYSTEM MODULE FOR EVAPORATIVE EMISSION CONTROL SYSTEM
First Claim
1. An active purge pump system module for an evaporative emission control system for a vehicle, the evaporative emission control system including a fuel tank, a vapor collection canister in communication with the fuel tank, an air intake directing air to an internal combustion engine of the vehicle, and a purge valve connected between the canister and the air intake, the active purge pump system module comprising:
- a pump in fluid communication with the canister, the pump being constructed and arranged to move air independently of operation of the engine; and
a bypass valve assembly in fluid communication with an upstream side and a downstream side of the pump so as to bypass the pump, the bypass valve assembly being constructed and arranged to be moved between opened and closed position such that when in the closed position, the pump, when activated, is constructed and arranged to move purge vapor from the canister, through the purge valve, and to the engine to be consumed during combustion, and when the bypass valve assembly is opened and the pump is deactivated, vehicle refueling is permitted.
3 Assignments
0 Petitions
Accused Products
Abstract
An active purge pump system module is provided for an evaporative emission control (EVAP) system for a vehicle. The EVAP system includes a fuel tank, a vapor collection canister in communication with the fuel tank, an air intake, and a purge valve connected between the canister and the air intake. The active purge pump system module includes a pump in fluid communication with the canister to move air independently of operation of the engine. A bypass valve assembly communicates with an upstream side and a downstream side of the pump to bypass the pump. In a closed position of the bypass valve assembly, the pump, when activated, moves purge vapor from the canister, through the purge valve, and to the engine to be consumed during combustion, and when the bypass valve assembly is opened and the pump is deactivated, vehicle refueling is permitted.
35 Citations
20 Claims
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1. An active purge pump system module for an evaporative emission control system for a vehicle, the evaporative emission control system including a fuel tank, a vapor collection canister in communication with the fuel tank, an air intake directing air to an internal combustion engine of the vehicle, and a purge valve connected between the canister and the air intake, the active purge pump system module comprising:
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a pump in fluid communication with the canister, the pump being constructed and arranged to move air independently of operation of the engine; and a bypass valve assembly in fluid communication with an upstream side and a downstream side of the pump so as to bypass the pump, the bypass valve assembly being constructed and arranged to be moved between opened and closed position such that when in the closed position, the pump, when activated, is constructed and arranged to move purge vapor from the canister, through the purge valve, and to the engine to be consumed during combustion, and when the bypass valve assembly is opened and the pump is deactivated, vehicle refueling is permitted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of purging vapor from a vehicle, the vehicle having an evaporative emission control system including a fuel tank, a vapor collection canister in communication with the fuel tank, an air intake directing air to an internal combustion engine of the vehicle, and a purge valve connected between the canister and the air intake, method comprising the steps of:
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providing a pump in fluid communication with the canister, and operating the pump independently of the engine to move purge vapor from the canister, through the opened purge valve, and to the engine to be consumed during combustion.
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17. The method of claim 16, further comprising:
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providing a bypass valve assembly in fluid communication with an upstream side and a downstream side of the pump so as to bypass the pump, the bypass valve assembly being constructed and arranged to be moved between opened and closed position, and prior to the operating step, moving the bypass valve assembly to the closed position. - View Dependent Claims (18, 19)
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20. The method of claim 16, wherein the step of moving purge vapor includes operating the pump to pull or pushing the purge vapor.
Specification