发明授权
- 专利标题: Apparatus for controlling the de-excitation time of electromagnetic devices, in particular electromagnetic injection valves in internal combustion engines
- 专利标题(中): 用于控制电磁装置的去磁时间,特别是内燃机中的电磁喷射阀的装置
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申请号: US122110申请日: 1980-02-19
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公开(公告)号: US4327692A公开(公告)日: 1982-05-04
- 发明人: Klaus Harsch , Peter Schulzke
- 申请人: Klaus Harsch , Peter Schulzke
- 申请人地址: DEX Stuttgart
- 专利权人: Robert Bosch GmbH
- 当前专利权人: Robert Bosch GmbH
- 当前专利权人地址: DEX Stuttgart
- 优先权: DEX2905900 19790216
- 主分类号: F02D41/20
- IPC分类号: F02D41/20 ; H01F7/18 ; H01F13/00 ; F02D5/00
摘要:
An apparatus is proposed for controlling the de-excitation time of electromagnetic devices, in particular electromagnetic injection valves in internal combustion engines, wherein a switch (or an actuation circuit in general) is disposed in series with the device, characterized in that a circuit arrangement with a controllable output potential is disposed in series or in parallel with the electromagnetic device. It is the purpose of the apparatus to linearize the current decrease through the electromagnetic device after the end of the actuation pulse and preferably to simultaneously control its rate of decrease. As a result, control of the de-excitation time of the particular electromagnetic device is attained. In terms of function, the circuit arrangement represents a controllable Zener diode.