Method for operating cabin air filtration system of vehicle, computer program, and electronic control unit
AssigneeMann+Hummel GmbH
InventorsJérôme MIGAUD, Vincent RAIMBAULT, Julien ZENNER
Life of this patent
Estimating the term…
Abstract
A method for operating a cabin air filtration system of a vehicle includes A) providing system information, B) providing a required vehicle filtration efficiency, and C) determining, from the system information for the vehicle, speed and a current magnitude of an air flow, a recirculation ratio of fresh air and recirculated air, such that a global filtration efficiency corresponds to the required vehicle filtration efficiency provided in step B).
Claims19
A method for operating a cabin air filtration system of a vehicle,
- wherein the cabin air filtration system comprises an air filter device for filtering an air flow into a cabin, the air flow being composed of fresh air from outside and recirculated air from inside the cabin,
- wherein a magnitude of the air flow through the air filter device is adjustable,
- wherein a ratio of the fresh air and the recirculated air of the air flow through the air filter device is adjustable,
- wherein a total influx of air from outside is enterable into the cabin as a filtered influx through the air filter device and as an unfiltered infiltration influx bypassing the air filter device,
- wherein the method comprises:
- A) providing system information linking:
- at least one characteristic of the air filter device comprising information on a global filtration efficiency for the total influx of air from outside into the cabin;
- the magnitude of the air flow through the air filter device;
- a vehicle speed;
- and
- the ratio of the fresh air and the recirculated air,
- wherein the global filtration efficiency is determined based on the magnitude of the air flow through the air filter device and the vehicle speed and the ratio of the fresh air and the recirculated air as variables,
- B) providing a required vehicle filtration efficiency;
- and
- C) determining, from the system information for the vehicle, speed and a current magnitude of the air flow, a recirculation ratio of the fresh air and the recirculated air, such that the global filtration efficiency corresponds to the required vehicle filtration efficiency provided in step B).
The method according to claim 1, wherein the required filtration efficiency is provided depending on an environmental pollution measurement. 10 The method according to claim 9, wherein the required filtration efficiency is determined such as to comply with different predefined limits for different pollutants.
A computer program for controlling a cabin air filtration system of a vehicle,
- wherein the cabin air filtration system comprises an air filter device for filtering an air flow into a cabin, the air flow being composed of fresh air from outside and recirculated air from inside the cabin,
- wherein a magnitude of the air flow through the air filter device is adjustable,
- wherein a ratio of the fresh air and the recirculated air of the air flow through the air filter device is adjustable,
- wherein a total influx of air from outside is enterable into the cabin as a filtered influx through the air filter device and as an unfiltered infiltration influx bypassing the air filter device, and
- wherein the computer program comprises commands cause an electronic control unit of the cabin air filtration system, on which the computer program is executed, to determine a recirculation ratio of the fresh air and the recirculated air from system information linking:
- at least one characteristic of the air filter device comprising information on a global filtration efficiency for the total influx of air from outside into the cabin;
- the magnitude of the air flow through the air filter device;
- a vehicle speed;
- and
- the ratio of the fresh air and the recirculated air,
- such that the global filtration efficiency corresponds to a required vehicle filtration efficiency for a current vehicle speed and a current magnitude of the air flow.
An electronic control unit for a cabin air filtration system of a vehicle,
- wherein the cabin air filtration system comprises an air filter device for filtering an air flow into a cabin, the air flow being composed of fresh air from outside and recirculated air from inside the cabin,
- wherein a magnitude of the air flow through the air filter device is adjustable,
- wherein a ratio of the fresh air and the recirculated air of the air flow through the air filter device is adjustable, and
- wherein a total influx of air from outside is enterable into the cabin as a filtered influx through the air filter device and as an unfiltered infiltration influx bypassing the air filter device,
- wherein the electronic control unit is configured to determine a recirculation ratio of the fresh air and the recirculated air from system information linking:
- at least one characteristic of the air filter device comprising information on a global filtration efficiency for the total influx of air from outside into the cabin;
- the magnitude of the air flow through the air filter device;
- a vehicle speed;
- and
- the ratio of the fresh air and the recirculated air,
- such that the global filtration efficiency corresponds to a required filtration efficiency for a current vehicle speed and a current magnitude of the air flow.
Dependencies are inferred from the claim text.