車輛機械煞車預警裝置試用評估

Field Testing of an Alarm Device for Failure Prevention of Automobile Hydraulic Brake Systems

本研究系製作一套車輛煞車失效安全預警裝置。此裝置是針對煞車系統本身包含煞車分泵、煞車制動器與制動元件、煞車來令片等為對象，並對可能衍生出的煞車失效現象進行監測，同時對已歸納設定之若干物理量進行感測，其中包含溫度、含水量兩項指標，基本概念乃是根據煞車失效時所可能綜合表現出的“徵兆”來監控。由實車測試的結果可知，來令片上之溫度感測裝置確可準確量測出煞車溫度，同時依其煞車效力將感測預警溫度為100C。而預警裝置在煞車溫度超越預警溫度時，確可歐動灑水裝置並達到降溫的目的。另外在煞車油含水量部分，則依含水量4％-5％之臨界範圍，做為煞車油含水量的安全預警值。當初過此一數值時，警示燈將亮起提醒駕駛人員更換煞車油。除此之外預警裝置經溫度循環及環境測試後並無任何損壞、腐蝕仍能維持原有功能。經由上述種種理論、測試結果證明，本研究所開發之煞車預警裝置其穩定度及可靠度均具一定之水準，確可符合商業需求，並達到符合商品化的目的。

A prototype of safety alarm system for automobile was developed. The failure modes of brake pump, brake activating mechanism and brake shoe linings were first studied before deriving temperature and moisture content as the monitoring parameters. From the field test, the thresh-hold monitoring temperature of braking shoe lining was set at 100 . When the brake shoe lining temperature exceed 100 , the water will spray automatically to cool down the brake shoe temperature. The alarming signal for the brake fluid moisture was set at 4 to 5%. Once this value was exceeded, the alarm signal will light-up to warn the driver changing the brake fluid. The components of the safety alarm systems also went through thermal cycling and environmental tests. There were no rust nor corrosion to these components. From these theoretical analysis and in-field testing, the safety alarm system was proved to be safe, effective and inexpensive for commercial application.