A computerized monitoring system is provided for sensing, displaying and storing a plurality of vehicle parameters for determining efficiency and to provide a detailed history of the vehicle throughout a work shift. The system is primarily intended for use on vehicles that carry heavy payloads many times...http://www.google.com.hk/patents/US5659470?utm_source=gb-gplus-share專利 US5659470 - Computerized monitoring management system for load carrying vehicle
