公开(公告)号：EP0806561B1

公开(公告)日：2000-06-07

申请号：EP97107132.9

申请日：1997-04-30

Applicant: STMicroelectronics S.r.l. ,  MAGNETI MARELLI S.p.A.

Inventor： Giorgetta, Valerio ,  Mastella, Paolo ,  Maggioni, Giampietro ,  Contucci, Mirco

IPC: F02D41/14

CPC classification number: F02D41/1494

公开(公告)号：EP0806561A1

公开(公告)日：1997-11-12

申请号：EP97107132.9

申请日：1997-04-30

Applicant: SGS-THOMSON MICROELECTRONICS s.r.l. ,  MAGNETI MARELLI S.p.A.

Inventor： Giorgetta, Valerio ,  Mastella, Paolo ,  Maggioni, Giampietro ,  Contucci, Mirco

IPC: F02D41/14

CPC classification number: F02D41/1494

Abstract: The circuit comprises a measurement resistor (Rs) in series with the heater (16, 28), a detector circuit (20) for providing a signal (VOP) indicative of the current flowing in the resistor (Rs), switching devices (PW1, PW2; PW3, PW4) for controlling the connection of the heater (16, 28) to a direct-current voltage source (Vbat) and the connection of the measurement resistor (Rs) in the supply circuit comprising the source (Vbat) and the heater (16, 28), and a control unit (18, 32) arranged to drive the switching devices (PW1, PW2; PW3, PW4) in a manner such that, each time the heater (16, 28) is activated, the measurement resistor (Rs) is kept disconnected from the supply circuit of the heater (16, 28) for a predetermined period of time and the measurement resistor (Rs) is then connected in the supply circuit of the heater (16, 28).

Abstract translation: 该电路与加热器（16,28）串联包括测量电阻器（RS），检测器电路（20），用于提供一个信号（VOP），其指示在所述电阻器（RS）中流动的电流的，开关装置（PW1， PW2，PW3，PW4），用于控制加热器的（）将一个直流电压源（VBAT）和测量电阻器的连接（RS）包括源Vbat的连接部16，28（在电源电路）和 加热器（16，28），并且布置成驱动所述开关装置（PW1，PW2; PW3，PW4）的控制单元（18，32）以这样的方式检查了，每当加热器（16，28）被激活，则 测量电阻器（RS）可以在预定的时间周期和测量电阻器保持断开从加热器（16，28）的供电电路（RS）然后连接在加热器（16，28）的供电电路。