Method And System For Regulated Exhaust Heating Of A Charcoal Canister Of An Emissions System To Reduce Heel
First Claim
1. An evaporative emission control system for a vehicle comprising:
- a fuel tank,a vapor collection canister in communication with the fuel tank,air intake structure directing air to an internal combustion engine of the vehicle,a purge valve connected between the canister and the air intake structure,a vent valve associated with a source of ambient air,mixing structure associated with vent valve to selectively receive the ambient air that passes through the vent valve,a feed line connected between an exhaust flow path associated with the engine and the mixing structure, an output air flow from the mixing structure being received by the canister, andan exhaust valve in the feed line for controlling pressurized exhaust air flow, from the exhaust flow path, to the mixing structure,wherein, under certain operating conditions, the exhaust air flow is received by the mixing structure along with the ambient air received through the vent valve, with the output air flow from the mixing structure purging the canister of hydrocarbons through the purge valve to be consumed by the engine.
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Accused Products
Abstract
A evaporative emission control system includes a fuel tank, canister communicating with the fuel tank, air intake structure directing air to an internal combustion engine, a purge valve connected between the canister and the air intake structure, a vent valve associated with a source of ambient air, mixing structure associated with vent valve to selectively receive the ambient air that passes through the vent valve, a feed line connected between an exhaust flow path associated with the engine and the mixing structure, an output air flow from the mixing structure being received by the canister, and an exhaust valve in the feed line for controlling pressurized exhaust air flow, from the exhaust flow path, to the mixing structure. The exhaust air flow is mixed with the ambient air in the mixing structure with the output air flow therefrom purging the canister of hydrocarbons to be consumed by the engine.
29 Citations
13 Claims
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1. An evaporative emission control system for a vehicle comprising:
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a fuel tank, a vapor collection canister in communication with the fuel tank, air intake structure directing air to an internal combustion engine of the vehicle, a purge valve connected between the canister and the air intake structure, a vent valve associated with a source of ambient air, mixing structure associated with vent valve to selectively receive the ambient air that passes through the vent valve, a feed line connected between an exhaust flow path associated with the engine and the mixing structure, an output air flow from the mixing structure being received by the canister, and an exhaust valve in the feed line for controlling pressurized exhaust air flow, from the exhaust flow path, to the mixing structure, wherein, under certain operating conditions, the exhaust air flow is received by the mixing structure along with the ambient air received through the vent valve, with the output air flow from the mixing structure purging the canister of hydrocarbons through the purge valve to be consumed by the engine. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of purging hydrocarbons from an evaporative emission control system of a vehicle, the control system including a fuel tank, a vapor collection canister in communication with the fuel tank, air intake structure directing air to an internal combustion engine of the vehicle, and a purge valve connected between the canister and the air intake structure, the method comprising the steps of:
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ensuring that pressured exhaust air flow from an exhaust flow path associated with the engine can be received by the canister, and selectively supplying the pressurized exhaust air flow to the canister to purge hydrocarbons from the canister through the purge valve to be consumed by the engine. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification