Patent ID: 6912895

Claim:
A coolant flow monitoring system for an engine cooling system, comprising: an engine having a heat producing component; a coolant passage disposed in thermal communication with said heat producing component; a coolant conduit connected in fluid communication with said coolant passage; a flow restrictor disposed within said coolant conduit; a first pressure sensing location of said coolant conduit; a second pressure sensing location of said coolant conduit, said flow restrictor being between said first and second pressure sensing locations; and a differential pressure sensing device connected in pressure sensing relation with said first and second pressure sensing locations, whereby a differential pressure between said first and second pressure sensing locations is representative of a magnitude of coolant flow passing through said coolant conduit, said differential pressure sensing device comprising a first pressure sensor connected in pressure sensing relation with said coolant conduit at said first pressure sensing location and a second pressure sensor connected in pressure sensing relation with said coolant conduit at said second pressure sensing location.