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Evaporative emissions filter

A technology of evaporative emissions and filters, which is applied in the field of filters, can solve the problems affecting the filter's vapor adsorption, vapor adsorption materials entering the air system, and harmful adsorbent materials, etc.

Inactive Publication Date: 2007-10-10
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the disadvantages associated with these combination filters include the potential for vapor adsorbent material to flake off the filter and enter the air system
Loss of sorbent material may deleteriously affect filter vapor sorption

Method used

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Embodiment Construction

[0027] It is desirable to substantially prevent vaporized hydrocarbon emissions from escaping into the atmosphere to meet regulations and become more environmentally friendly. It would also be desirable to achieve such substantial prevention without restricting airflow through the intake system. In addition, it is also desirable to achieve this relatively inexpensively. It would also be desirable to achieve this with a lower likelihood of fouling the sorbent material than a barrier filter.

[0028] The evaporative emission filter of the present invention substantially satisfies the above needs. The inventors have unexpectedly and fortunately discovered a sorption filter / component and methods of making and using the same (further described below in conjunction with FIG. 3 etc.), which reduces the traditionally used sorption The amount of media, while increasing the surface area of ​​the adsorption media exposed to the desired gaseous adsorbate, a non-limiting example of which...

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Abstract

An evaporative emissions filter for an engine air induction system. The evaporative emissions filter includes a hydrocarbon vapor-adsorbent member disposed within the air induction system outside the direct air flow path. A mechanism is provided for mounting the evaporative emissions filter within the air induction system. Hydrocarbon vapors present in the air induction system after engine shutdown are substantially retained in the adsorbent member until air flows through the air induction system after the engine starts.

Description

technical field [0001] The present invention relates generally to filters, and more particularly to filters for absorbing hydrocarbon vapors. Background technique [0002] In an internal combustion engine, when the engine is running, there is a constant flow of air through the intake system into the intake manifold and eventually through the intake valves into the combustion chamber. Airflow is caused by the intake stroke of the piston, which draws a vacuum on the intake manifold. This creates a pressure imbalance between the intake manifold and the environment, whereby air is rushed through the intake system. Due to the low internal pressure in the intake manifold and the constant airflow into the engine, there are no evaporative emissions from the intake manifold or intake system. [0003] Additionally, when a modern fuel injected engine is running, the fuel system maintains the fuel in the fuel rail(s) at sufficient pressure to prevent fuel from evaporating, even though...

Claims

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Application Information

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IPC IPC(8): B01D53/04F02M25/08B01D53/02F02M35/024F02M35/10
CPCB01D53/0407F02M35/10019F02M25/0854B01D53/0415B01D2259/40086B01D2259/4516F02M25/08B01D2253/306F02M35/024B01D2253/20B01D2253/102B01D53/02B01D2253/25B01D2253/304B01D2253/202B01D2259/4566B01D2253/108B01D2257/702F02M35/0218B01D53/04
Inventor G·B·祖劳夫D·E·鲍斯R·L·史密斯R·P·罗尔巴赫R·J·伯基B·W·斯特雷姆勒P·D·昂格尔
Owner HONEYWELL INT INC