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In the US, the speed at which fuel efficiency is maximized often lies below the speed limit, typically 35 to 50 mph (56 to 80 km/h); however, traffic flow is often faster than this. The speed differential between cars raises the risk of collision. [9]
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However, improvements in computer speed have combined with interest in realistic physics, leading to driving simulators that are used for vehicle engineering using detailed models such as CarSim. It is important that the models should agree with real world test results, hence many of the following tests are correlated against results from ...
The advent of concern about fuel economy and emissions had major impacts on engine design. Some of the trade-offs reduced throttle response. Most new cars employ a drive-by-wire system, which includes electronic throttle control and can itself either reduce or increase throttle response (Depending on whether or not it's being employed on a performance car).
6. Fill Up on Antifreeze. Before the big chill sets in, make sure to top off your antifreeze -- but use a winter-specific formula. Antifreeze must be mixed with water, usually in an exact 50/50 ratio.
Unsafe at Any Speed is primarily known for its critique of the Chevrolet Corvair, although only one of the book's eight chapters covers the Corvair.It also deals with the use of tires and tire pressure being based on comfort rather than on safety, and the automobile industry disregarding technically based criticism. [2]
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A car's speed is limited by the power required to drive it against air resistance, which increases with speed. At the maximum possible speed, the engine is running at its point of maximum power, or power peak , and the car is traveling at the speed where air resistance equals that maximum power.