发明名称 |
TENDSYSTEM FOR FORBRENNINGSMOTOR MED TENDSPOLE OCH DERTILL ANSLUTEN OVERSPENNINGSSKYDDSKRETS |
摘要 |
An overvoltage protection circuit is galvanically, directly connected across at least part of the secondary winding in the ignition system of an internal combustion engine. The input portion of the overvoltage protection circuit is a voltage divider preferably constituted by RC elements. The voltage at the tap of the voltage divider is applied to a Schmitt trigger. When the voltage across the secondary winding becomes excessively high, the Schmitt trigger output pulse triggers a monostable multivibrator whose output pulse in turn increases the conductivity of a transistor switch located in series with the primary. The increase in primary current tends to oppose further increases in primary and secondary voltages. Alternatively, the output from the multivibrator could be used to shorten the time of current flow in the primary winding in subsequent ignition time intervals or to completely block any subsequent ignition process. |
申请公布号 |
SE443194(B) |
申请公布日期 |
1986.02.17 |
申请号 |
SE19800006898 |
申请日期 |
1980.10.02 |
申请人 |
ROBERT BOSCH GMBH |
发明人 |
K-H * ADLER;G * PFAFF;R * LEUSSINK;G * SOHNER;G * HOHNE;T * JEKH;H * DECKER |
分类号 |
F02P3/045;F02P3/055;(IPC1-7):F02P11/00;F02P3/04 |
主分类号 |
F02P3/045 |
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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