- 专利标题： Short-Circuit Fault-Detecting Lighting Device for a Motor Vehicle
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申请号： US18283577申请日： 2022-03-01
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公开(公告)号： US20240166130A1公开(公告)日： 2024-05-23
- 发明人: Daniel PETSCH
- 申请人： ZKW Group GmbH
- 申请人地址： AT Wieselburg
- 专利权人： ZKW Group GmbH
- 当前专利权人： ZKW Group GmbH
- 当前专利权人地址： AT Wieselburg
- 优先权： EP 165642.6 2021.03.29
- 国际申请： PCT/EP2022/055044 2022.03.01
- 进入国家日期： 2023-09-22
- 主分类号： B60Q11/00
- IPC分类号： B60Q11/00 ; H05B45/58
摘要：
The invention relates to a short-circuit fault detection illumination device (1) for a motor vehicle headlight, comprising
a voltage input (SE) and a terminal (ME) for connection to earth potential,
a power branch (LS) supplied via the voltage input (SE), which comprises a number of light sources (2) to be monitored, wherein this number is at least two, wherein the light sources (2) are designed to emit the light of the illumination device (1) and the light sources (2) are connected to one another in series within the power branch (LS),
wherein the illumination device (1) further
has an auxiliary branch (HS) with transistors (3) arranged therein and connected to one another in series, wherein each light source (2) of the power branch (LS) is associated with one of the transistors (3), and thus a monitoring pair (P1, P2, P3, P4), consisting of a light source (2) to be monitored and a transistor (3) assigned for monitoring, is formed, wherein each transistor (3) is coupled to the cathode and anode of the light source (2) in such a manner that the voltage that drops across the light source (2) in normal operation is used to connect the transistor (3), and in the event of a short circuit of the light source (2), the voltage drop caused by the short circuit leads to a blocking of the transistor (3) and thus of the auxiliary branch (HS), wherein the short-circuit fault detection illumination device (1) further has a fault detection device (6) coupled to the auxiliary branch (HS), which is designed to output an error signal (SF) or trigger an error routine (FR) in the event of the auxiliary branch being blocked.
a voltage input (SE) and a terminal (ME) for connection to earth potential,
a power branch (LS) supplied via the voltage input (SE), which comprises a number of light sources (2) to be monitored, wherein this number is at least two, wherein the light sources (2) are designed to emit the light of the illumination device (1) and the light sources (2) are connected to one another in series within the power branch (LS),
wherein the illumination device (1) further
has an auxiliary branch (HS) with transistors (3) arranged therein and connected to one another in series, wherein each light source (2) of the power branch (LS) is associated with one of the transistors (3), and thus a monitoring pair (P1, P2, P3, P4), consisting of a light source (2) to be monitored and a transistor (3) assigned for monitoring, is formed, wherein each transistor (3) is coupled to the cathode and anode of the light source (2) in such a manner that the voltage that drops across the light source (2) in normal operation is used to connect the transistor (3), and in the event of a short circuit of the light source (2), the voltage drop caused by the short circuit leads to a blocking of the transistor (3) and thus of the auxiliary branch (HS), wherein the short-circuit fault detection illumination device (1) further has a fault detection device (6) coupled to the auxiliary branch (HS), which is designed to output an error signal (SF) or trigger an error routine (FR) in the event of the auxiliary branch being blocked.
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