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公开(公告)号：EP1727718B1
公开(公告)日：2011-05-04
申请号：EP05724795.9
申请日：2005-03-07
申请人： Tennant
发明人： LORING, Peter Alexander , FEENY, Steven Vincent , ERKO, Robert J. , GROSCHEN, Paul , MILUN, Richard
CPC分类号： B60L7/26 , B60L2240/30 , B60T1/10
摘要： A rider surface maintenance vehicle with variable dynamic braking, in contrast to a mechanically-engaged braking system that uses a brake cable. A brake pedal engages a sensor that encodes the pedal position as an electronic signal. The electronic signal, along with the vehicle velocity, determines a machine deceleration rate, or braking rate, either by calculation, lookup table, or a combination of the two. The braking rate may be tuned so that the of the brake mimics or approximates the feel of a conventional mechanically-engaged brake that uses a brake cable. During stopping, once the vehicle passes below a threshold velocity, a parking brake is automatically engaged. The braking rate is converted to a duty cycle, and the braking is preferably accomplished by pulse width modulation (PWM) of an electrical load applied in parallel to the motor.
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公开(公告)号：EP1727718A2
公开(公告)日：2006-12-06
申请号：EP05724795.9
申请日：2005-03-07
申请人： Tennant
发明人： LORING, Peter Alexander , FEENY, Steven Vincent , ERKO, Robert J. , GROSCHEN, Paul , MILUN, Richard
IPC分类号： B60T13/74
CPC分类号： B60L7/26 , B60L2240/30 , B60T1/10
摘要： A rider surface maintenance vehicle with variable dynamic braking, in contrast to a mechanically-engaged braking system that uses a brake cable. A brake pedal engages a sensor that encodes the pedal position as an electronic signal. The electronic signal, along with the vehicle velocity, determines a machine deceleration rate, or braking rate, either by calculation, lookup table, or a combination of the two. The braking rate may be tuned so that the of the brake mimics or approximates the feel of a conventional mechanically-engaged brake that uses a brake cable. During stopping, once the vehicle passes below a threshold velocity, a parking brake is automatically engaged. The braking rate is converted to a duty cycle, and the braking is preferably accomplished by pulse width modulation (PWM) of an electrical load applied in parallel to the motor.
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