Purge Pump Control Systems And Methods
First Claim
1. A fuel vapor control system for a vehicle, comprising:
- a fuel vapor canister that traps fuel vapor from a fuel tank of the vehicle;
a purge valve that opens to allow fuel vapor flow to an intake system of an engine and that closes to prevent fuel vapor flow to the intake system of the engine;
an electrical pump that pumps fuel vapor from the fuel vapor canister to the purge valve;
a vent valve that allows fresh air flow to the vapor canister when the vent valve is open and that prevents fresh air flow to the vapor canister when the vent valve is closed; and
a purge control module that controls a speed of the electrical pump, opening of the purge valve, and opening of the vent valve.
1 Assignment
0 Petitions
Accused Products
Abstract
A fuel vapor control system for a vehicle includes a fuel vapor canister that traps fuel vapor from a fuel tank of the vehicle. A purge valve opens to allow fuel vapor flow to an intake system of an engine and closes to prevent fuel vapor flow to the intake system of the engine. An electrical pump pumps fuel vapor from the fuel vapor canister to the purge valve. A vent valve allows fresh air flow to the vapor canister when the vent valve is open and prevents fresh air flow to the vapor canister when the vent valve is closed. A purge control module controls a speed of the electrical pump, opening of the purge valve, and opening of the vent valve.
14 Citations
20 Claims
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1. A fuel vapor control system for a vehicle, comprising:
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a fuel vapor canister that traps fuel vapor from a fuel tank of the vehicle; a purge valve that opens to allow fuel vapor flow to an intake system of an engine and that closes to prevent fuel vapor flow to the intake system of the engine; an electrical pump that pumps fuel vapor from the fuel vapor canister to the purge valve; a vent valve that allows fresh air flow to the vapor canister when the vent valve is open and that prevents fresh air flow to the vapor canister when the vent valve is closed; and a purge control module that controls a speed of the electrical pump, opening of the purge valve, and opening of the vent valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A fuel vapor control method for a vehicle, comprising:
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by a vapor canister, trapping fuel vapor from a fuel tank of the vehicle; selectively opening a purge valve to allow fuel vapor flow to an intake system of an engine; selectively closing the purge valve to prevent fuel vapor flow to the intake system of the engine; pumping fuel vapor from the vapor canister to the purge valve using an electrical pump; selectively opening a vent valve to allow fresh air flow to the vapor canister; selectively closing the vent valve to prevent fresh air flow to the vapor canister; and controlling a speed of the electrical pump, opening of the purge valve, and opening of the vent valve. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification