Braking system for an industrial truck

摘要

#CMT# #/CMT# The system has a steering controller (22) actuating a switch contact (28), which breaks an electrical connection between a battery (32) and an emergency stop brake. Electronic power switches (40, 42) are connected in series with the switch contact and actuated by a pulse width modulation (PWM) actuator of a vehicle controller (36). A controller area network bus (44) is connected between the steering and vehicle controllers such that the switch contact and the switches are connected according to measures of cycles of the PWM actuator during occurrence of an error signal or a brake signal. #CMT#USE : #/CMT# Braking system for an industrial truck e.g. four wheel industrial truck and battery-driven industrial truck. #CMT#ADVANTAGE : #/CMT# The controller area network bus is connected between the steering and vehicle controllers such that the switch contact and the switches are connected according to the measures of cycles of the pulse width modulation actuator during occurrence of the error signal or the brake signal, thus reducing the braking effect of the emergency stop brake in case of error without influencing the requirements of the safety structure. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic block diagram of a brake system a four wheel industrial truck. 10, 12 : Wheels 22 : Steering controller 24 : Microprocessor 28 : Switch contact 32 : Battery 36 : Vehicle controller 40, 42 : Electronic power switches 44 : Controller area network bus.