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      07-24-2014, 10:55 AM   #17
grant
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Drives: 1973 Porsche 911
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Quote:
Originally Posted by Vlad-Miami View Post
Loss of power support happens on all cars with HPS (70% of cars at least), why would it frighten anyone? Also does it happen with EPS too?
Start/Stop is one of the primary reasons companies have adopted EPS. With hydraulic, there is total loss of power steering if the motor stops - with EPS, the system just runs from the battery when the motor is stopped.

I hate EPS, but I understand why it's here to stay. Hope they can improve it, but seems we may be destined to have lost good feel and feedback from modern steering (until cars can become light enough not to need power assist at all, like new little Alfa 4C).

Of course, the proper way to do power steering that can cope with Start/Stop is to have hydraulic steering where the pump is driven by an electric motor (all the feel of hydraulic with the efficiency and flexibility of EPS - just costs more and adds a little weight). This is how it's done in a McLaren 12C road car and factory Porsche race cars.
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