Patent ID: 9052241
Filing Date: 2015-06-09
Classification: F02D,F02P,G01K

Abstract:
1. A method for determining the temperature of at least one engine ignition coil ( 1 ) for a motor vehicle, said coil comprising a primary winding ( 11 ) with a winding resistance (Rp) and an inductance (Lp), said primary winding being controlled by a control stage ( 2 ) with a switch ( 6 ) and a foot resistance (Rsh), the method comprising the following steps: a) controlling the control stage ( c) determining the primary current Ip ( d) acquiring the value of the supply voltage VB and the voltage Vce to the terminals of the switch; e) determining the winding resistance Rp using the formula: f) determining the temperature of the primary winding using a temperature-resistance (CoilTemp =g(Rp)) correspondence curve.