Breather for an internal combustion engine fuel tank
First Claim
1. A breather for a fuel tank of an internal combustion engine having a housing, an adsorption filter in said housing, said housing is linked by means of a suction line to an induction manifold of the internal combustion engine and, a filter line between said housing and the fuel tank and a breather line connected with said housing and to the atmosphere, a shut-off valve in said breather line which can shut off said breather line, said shut-off valve having a valve seat and a valve closing body, the shut-off valve (51, 51'"'"') is provided with a magnetic circuit (54) which when energized moves the valve closing body (55) into the closing position and which is designed to be only of such power that above a certain pressure in the adsorption filter (1), the force produced thereby is sufficient to move the valve closing body (55) into the opening position.
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Accused Products
Abstract
A breather valve for the gas tank of an internal combustion engine having an adsorption filter which is linked to the atmosphere by a breather line which is controlled by a shut-off valve. The tank breather valve is constructed so that pressure build up in the fuel tank, the lines, and the adsorption filter do not lead to damage of the valves. The magnetic circuit of the shut-off valve provides that above a predetermined pressure in the adsorption filter, the generated pressure is sufficient to open the shut-off valve, thereby facilitating pressure relief without any damage. The breather is particularly suitable for internal combustion engines in motor vehicles.
18 Citations
23 Claims
- 1. A breather for a fuel tank of an internal combustion engine having a housing, an adsorption filter in said housing, said housing is linked by means of a suction line to an induction manifold of the internal combustion engine and, a filter line between said housing and the fuel tank and a breather line connected with said housing and to the atmosphere, a shut-off valve in said breather line which can shut off said breather line, said shut-off valve having a valve seat and a valve closing body, the shut-off valve (51, 51'"'"') is provided with a magnetic circuit (54) which when energized moves the valve closing body (55) into the closing position and which is designed to be only of such power that above a certain pressure in the adsorption filter (1), the force produced thereby is sufficient to move the valve closing body (55) into the opening position.
Specification