Does EPS steering fail in the event of engine stall? - Kia Forum

 
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post #1 of 3 (permalink) Old 06-16-2013, 02:42 PM Thread Starter
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Does EPS steering fail in the event of engine stall?

I was wondering about the safety aspects of the EPS steering on my 2014 Sorento, but I imagine this would also apply to other Kia models. If the engine dies when driving will the EPS steering shut down? I looked on here for the answer and didnt get what I needed. I found this and thought it would do well here for any other forum members with the same concern.

Electro Hydraulic Power Steering (EHPS): This design utilises a hydraulic steering pump driven by an electric motor. The pump powers a standard hydraulic power steering rack gear.

Electric Power Assisted Steering (EPAS): This design utilises a steering column which is powered by an electric motor. This assists a standard rack and pinion unit.

Electric Power Steering (EPS): This design brings together a rack and pinion steering unit and an integrated electric motor offering power assist.


Electric power steering (EPS or EPAS) uses an electric motor to assist the driver of a vehicle. Sensors detect the position and torque of the steering column, and a computer module applies assistive torque via the motor, which connects to either the steering gear or steering column. This allows varying amounts of assistance to be applied depending on driving conditions. Engineers can therefore tailor steering-gear response to variable-rate and variable-damping suspension systems, optimizing ride, handling, and steering for each vehicle. These give more assistance as the vehicle slows down, and less at faster speeds. In the event of component failure that fails to provide assistance, a mechanical linkage such as a rack and pinion serves as a back-up in a manner similar to that of hydraulic systems.

Electric systems have an advantage in fuel efficiency because there is no belt-driven hydraulic pump constantly running, whether assistance is required or not, and this is a major reason for their introduction. Another major advantage is the elimination of a belt-driven engine accessory, and several high-pressure hydraulic hoses between the hydraulic pump, mounted on the engine, and the steering gear, mounted on the chassis. This greatly simplifies manufacturing and maintenance. By incorporating electronic stability control electric power steering systems can instantly vary torque assist levels to aid the driver in corrective maneuvers.

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post #2 of 3 (permalink) Old 06-16-2013, 06:02 PM
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I wouldn't worry too much about the electric assist power steering...
It would "act" just like a standard fluid driven ps with the engine off...
The steering would be much harder at a stop but the second the car begins to roll it would be OK... Nothing to be alarmed about..The car will still steer.
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post #3 of 3 (permalink) Old 06-16-2013, 09:03 PM Thread Starter
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Yea, I saw it explained well in this info I had found. Thats why I thought it would be great to have it in this forum for any other members that were wondering also.
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