Safety-related control systems brakes

Description The braking system is one of several key safety-related items. Catastrophic brake failure, such as sudden air loss, may lead to loss of control and the driver s inability to recover. Progressive brake deterioration, such as brake shoe wear without corresponding adjustment, can be even more troublesome because it may... 

Preventative maintenance is needed to identify potential failures before employees are put at risk of injury. Worn or defective parts need to be repaired or replaced and adjustments need to be made at set intervals to ensure the press will continue to work safely, in particular those parts that could cause danger if they failed or deteriorated such as brakes, clutches, guards and safety-related parts of the control system. 

It needs to be pointed out that ESP 1 is not an unsafe system even if the overall reliability is worse. The system offers the additional safety related function for electronically controlled car stabilization. This function is as important as the anti-lock braking and has a great potential to avoid accidents. Therefore, the worse (functional) reliability for anti-lock braking can be charged against the improved safely of the ESP. 

The analysis of the basic safety related functions, hke the electronic brake force distribution (EBD), is not as simple as the one of ABS and ESP because of the redundant brake circuits. EBD, for example, uses for a normal control all four wheel speed sensors to perform the control as comfortable as possible. But the function is also available when two wheel speed sensors are defective. In this case, the wheel speed sensors have to be taken into account as a m-out-of-n system. 

Does your preventive maintenance and inspection program recognize the following safety-related vehicle components whose deterioration directly affects vehicle control - braking system - steering system - couplers - tires and wheels - suspension... 

ISO 26262 defines the relalion of risk, danger and safety integrity differently. The term safety integrity is not directly used in ISO 26262. In particular the term EUC (Equipment under Control) is not used at aU. EUC could be explained as device or system, which should be controlled by means of functional safety measures . Under certain limiting conditions ISO 26262 admits to develop a desired vehicle function that is safety-related on its own. In this case, the system does not receive safety through EUC itself. Technically, according to lEC 61508, EUC and the safety functions have to cause an error at the same time in order to create a hazardous situation. If for example a hydraulic braking system was the... 

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