发明名称 |
ENGINE PREHEATING APPARATUS |
摘要 |
PURPOSE:To enable to detect current with no need of connecting a current detecting circuit, by using glow plugs having a prescribed temperature coefficient of resistance, and detecting the magnetic field produced by the current passed through the glow plugs. CONSTITUTION:A current detecting and amplifying block 30 is disposed at a position of a conductor 5 located on the downstream side of a main relay 1 and it is connected to a glow plug controlling circuit 32 by a bundle of conductors 31 for feeding current and transmitting the output signal of the block 30. The current detecting block consists of a magnetic circuit 8 which is constituted by a material like iron or ferrite having a high magnetic permeability that is disposed in the manner of surrounding the conductor 5, and a detector element 6 consisting of a magnetic resistance element serving as a Hall-effect element is inserted to a portion of the circuit 8. By thus detecting and controlling the temperature of glow plugs by a magnetic means, it is enabled to enhance reliability of the circuitry. |
申请公布号 |
JPS5923079(A) |
申请公布日期 |
1984.02.06 |
申请号 |
JP19820131585 |
申请日期 |
1982.07.27 |
申请人 |
NIPPON JIDOSHA BUHIN SOGO KENKYUSHO KK |
发明人 |
KOBAYASHI AKIHIRO;MORINO SEIJI |
分类号 |
F02P19/02;(IPC1-7):02P19/02 |
主分类号 |
F02P19/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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