Method of detecting clogging of an air filter and ventilation system employing such a method
AssigneeValeo Climatisation
InventorNicolas Abouchaar
Life of this patent
Estimating the term…
Abstract
A method of measuring clogging of an air filter in a system for ventilation, air conditioning and/or heating of a passenger compartment of a motor vehicle, includes starting up an electric motor (11) driving a fan, measuring a characteristic value of the electric motor for driving the air passing through the filter (3) the clogging of which is being measured; comparing the measured value with a calibration value, to deduce therefrom a measure of the clogging of the filter.
Claims20
A method of measuring clogging of an air filter of a system for ventilation, air conditioning, and/or heating of a passenger compartment of a motor vehicle, the method comprising:
- starting up an air-pumping device including an electric motor driving an air-driving rotating aerodynamic component;
- measuring a single characteristic value of the electric motor driving at least one rotating aerodynamic component for driving the air passing through the filter the clogging of which is being measured, in order to obtain a single measurement value;
- comparing the measurement value with a single calibration value in order to deduce solely therefrom a measure of the clogging of the filter,
- wherein said calibration value is obtained by measurement of said characteristic value of the electric motor driving a rotating aerodynamic component for driving air passing through a new filter.
A method of measuring clogging of an air filter of a ventilation system in a passenger compartment of a motor vehicle, said method comprising the steps of:
- running an air pumping device driven by an electric motor to produce air flow through said ventilation system;
- determining a calibration value of a single characteristic of said electric motor;
- storing said calibration value in a memory of a computer;
- measuring a present value of said characteristic of said electric motor;
- comparing said present value with said-calibration value;
- and
- determining a clogging index based solely upon said step of comparing said present value to said calibration value, wherein said step of determining said calibration value is determined when said filter is known to be unclogged.
Dependencies are inferred from the claim text.