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Regeneration of evaporative emision control system for plug-in hybrid vehicle

Technology of a hybrid vehicle, control system, applied in the field of fuel tank gasoline vapor

Inactive Publication Date: 2011-04-13
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plug-in hybrid vehicle IC engine can be out of operation for days, which results in the evaporative emission control canister not being purged (cleaned) by engine operation

Method used

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  • Regeneration of evaporative emision control system for plug-in hybrid vehicle
  • Regeneration of evaporative emision control system for plug-in hybrid vehicle
  • Regeneration of evaporative emision control system for plug-in hybrid vehicle

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Experimental program
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Embodiment Construction

[0014] A plug-in hybrid motor vehicle has a suitable rechargeable battery system which typically powers at least one electric motor for driving at least two wheels. While the vehicle is being driven by a vehicle operator, the programmed computer is used to manage the operation of the electric motor and the power delivered to the wheels in response to operator commands. While the battery system can be charged when the vehicle is not being driven, vehicle range is limited even with a fully charged battery system. In the hybrid electric motor powered vehicles involved, the onboard gasoline powered engine is arranged to power a generator to drive the electric motor when the battery reaches a low charge condition. The present invention and the following illustrations focus on a fuel tank and evaporative emissions control system for a plug-in hybrid vehicle gasoline engine.

[0015] Fuel evaporative emission control systems have been used for many years on motor vehicles powered by...

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PUM

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Abstract

A plug-in hybrid vehicle is driven by one or more electric motors powered by a battery system with supplemental electric power provided by a gasoline engine powered generator. A canister with fuel vapor adsorptive material, connected by a fuel vapor vent passage, is used to admit and temporarily adsorb fuel vapor from a vehicle fuel tank during refueling and diurnal heating. The canister also hasan air flow passage for venting the canister and introducing ambient air (in the reverse flow direction) for removing vapor stored in the canister during canister purging. The canister has a second passage for conducting air and purged vapor from the canister to the operating engine. When engine operation is insufficient to purge fuel vapor from the fuel adsorptive material, microwave energy is used to heat the material to purge adsorbed fuel vapor and drive the vapor back through the fuel vapor vent passage into the fuel tank. A vacuum pump in the vent passage may assist the flow of the purged fuel vapor.

Description

technical field [0001] The present invention relates to the management of fuel tank gasoline vapors generated during operation of a motor vehicle powered by a battery powered electric motor, wherein the motor vehicle has a gasoline engine for generating supplemental electrical power during an extended driving journey. On-board activated carbon canisters are provided to adsorb fuel vapors that are expelled from the fuel tank during refueling and diurnal heating cycles. The present invention relates to the use of microwaves to heat the canister to return stored fuel vapors to the fuel tank, particularly when engine operation cannot clean (purge) the canister of stored fuel vapors. Background technique [0002] The concern is to produce passenger cars that are driven by electric motors powered by rechargeable batteries (eg lithium-ion batteries). The operating range of battery-powered vehicles will be increased by using an on-board generator driven by the gasoline engine when ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/08F02M37/02B60W20/00
CPCF02M25/089F02M27/08F02M25/0854
Inventor S·R·里迪
Owner GM GLOBAL TECH OPERATIONS LLC