Discussion
Consider the following statements about power steering.
1. Hydraulic assistance consumes engine power continuously.
2. Electric assistance enables lane keeping intervention.
3. Electric assistance requires an engine driven pump.
Which of the statements given above is or are correct?
Answer: A
The first two statements are correct, but electric assistance uses a motor and needs no pump at all. Removing the pump is precisely what saves the fuel and what allows the assistance to be commanded electronically. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. The shared behaviour explains why these belong together and the differences explain why both exist.
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