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Automotive dictionary (encyklopedia)

Dictionary of terms and abbreviations for cars (automobiles), motorcycles (bikes),
bicycles, boats, engines, machines, machining and car fixing.

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Wankel engine

A rotary internal combustion engine invented by Felix Wankel (1902-1988). It consists of an equilateral triangular member with curved sides orbiting about an eccentric on a shaft inside a stationary housing whose inner working surface is in the shape of an epitrochoid. The rotor is in sliding contact with the eccentric and imparts power to the eccentric shaft as a connecting rod does to a crankshaft. With one-third of a rotor revolution per shaft revolution and a power impulse for each of the three rotor sides, the Wankel generates one power impulse per revolution per rotor—twice that of what the four-cycle piston engine produces. Thus it has become accepted practice to multiply the geometry displacement of the Wankel by a factor of two for comparison with otto-cycle piston engines. The Wankel's advantages include compact size, light weight and smooth operation because there are no reciprocating parts. Its drawbacks include relatively high exhaust emission, possible sealing problems and low fuel economy. Mazda, however, has made significant improvements in all three areas.
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Six Major Factors that Influence Auto Insurance Rates

No two car insurance rates are the same. From driver to driver, several factors will change how much a policyholder pays for even the same coverage. Here we review the six main components that go into the auto insurance rates recipe.

1. How Much You Drive

Car insurance companies measure rates based on risk. The more miles you drive, the higher the risk you will be in a car accident. You’ll pay more if you drive more. If, on the other hand, you drive fewer than 10,000 miles annually, you may qualify for a low mileage discount from your auto insurer. People who carpool often receive discounts because they drive less frequently.

2. Your Driving History

Being a good driver matters to car insurers. Many insurance companies offer special discounts to good drivers. If you have had a series of accidents or traffic violations, you may pay more for your premium. If you have not carried car insurance in several years, you may also pay more for your policy.

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