Filter structure
AssigneeFilterwerk Mann & Hummel GmbH
InventorsMichael Willig, Stefan Rumpp
Life of this patent
Estimating the term…
Abstract
A filter unit for a motor vehicle which combines an intake air filter for an internal combustion engine and an interior ventilation air filter for a passenger compartment in a single unit. Filter housings for the respective filters may be joined to each other by a releasable connection, such as a combination of attachment hooks and screw fasteners, or they may be formed integrally with each other in one piece.
Claims15
An air intake filter for an internal combustion engine, comprising a first housing structure in which a first filter element is disposed between an intake air inlet and an intake air outlet, and a second housing structure in which a second filter element is disposed between a ventilating air inlet and a ventilating air outlet, wherein said first housing structure and said second housing structure are joined together to form a single filter unit, and wherein a duct section is integrated into at least one of said first and second housing structures for carrying an intake air flow to the internal combustion engine or a ventilation air flow to the passenger compartment.
An air intake filter for an internal combustion engine, comprising a first housing structure in which a first filter element is disposed between an intake air inlet and an intake air outlet, and a second housing structure in which a second filter element is disposed between a ventilating air inlet and a ventilating air outlet, wherein said first housing structure and said second housing structure are joined together to form a single filter unit;
- wherein the first housing structure defines a first flow path between the intake air inlet and the intake air outlet, and the first filter element is disposed in the first flow path;
- wherein the second housing structure defines a second flow path between the ventilating air inlet and the ventilating air outlet, and the second filter element is disposed in the second flow path;
- wherein the first and second flow paths are separate from each other, whereby air flowing through the first flow path does not flow through the second flow path;
- and wherein the first flow path supplies air to the internal combustion engine for combustion, and wherein the second flow path supplies air to a passenger compartment.
A method of installing a filter unit that includes a first housing structure in which a first filter element is disposed between an intake air inlet and an intake air outlet, and a second housing structure in which a second filter element is disposed between a ventilating air inlet and a ventilating air outlet, wherein said first housing structure and said second housing structure are joined, the method comprising:
- connecting the intake air outlet to an engine of a motor vehicle so that combustion air can flow into the first housing structure through the intake air inlet, flow through the first filter element, and flow through the intake air outlet to the engine;
- and
- connecting the ventilating air outlet to an interior space of the motor vehicle so that ventilating air can flow into the second housing structure through the ventilating air inlet, flow through the second filter element, and flow through the ventilating air outlet to the interior space.
A method of installing a filter unit that includes a first housing structure in which a first filter element is disposed between an intake air inlet and an intake air outlet, and a second housing structure in which a second filter element is disposed between a ventilating air inlet and a ventilating air outlet, the method comprising:
- connecting the intake air outlet to an engine of a motor vehicle so that combustion air can flow into the first housing structure through the intake air inlet, flow through the first filter element, and flow through the intake air outlet to the engine;
- connecting the ventilating air outlet to an interior space of the motor vehicle so that ventilating air can flow into the second housing structure through the ventilating air inlet, flow through the second filter element, and flow through the ventilating air outlet to the interior space;
- and
- joining the first housing structure with the second housing structure.
Dependencies are inferred from the claim text.