Wednesday, February 08, 2006

What Makes it a

by Karim Nice

Any vehicle is a hybrid when it combines two or more sources of power. In fact, many people have probably owned a hybrid vehicle at some point. For example, a mo-ped (a motorized pedal bike) is a type of hybrid because it combines the power of a gasoline engine with the pedal power of its rider.

Hybrid vehicles are all around us. Most of the locomotives we see pulling trains are diesel-electric hybrids. Cities like Seattle have diesel-electric buses -- these can draw electric power from overhead wires or run on diesel when they are away from the wires. Giant mining trucks are often diesel-electric hybrids. Submarines are also hybrid vehicles -- some are nuclear-electric and some are diesel-electric. Any vehicle that combines two or more sources of power that can directly or indirectly provide propulsion power is a hybrid.

The gasoline-electric hybrid car is just that -- a cross between a gasoline-powered car and an electric car. Let's start to explain the differences.

Gas-powered Car

A gas-powered car has a fuel tank, which supplies gasoline to the engine. The engine then turns a transmission, which turns the wheels.

A typical four-cylinder engine for gasoline-powered car engines typically produce more than 100 ht and operate at speeds up to 8000 rpm.

The energy storage device for the car, it usually gives the car a range of 300 miles or more.
The transmission allows the engine to operate in a narrow speed range while allowing the car to drive at speeds 0 to 150 mph.

Electric Car

Electric car has a set of batteries that provides electricity to an electric motor. The motor turns a transmission, and the transmission turns the wheels.

The electric motor can spin at speeds up to 15000 rpm and has up to 100 KW of power, giving some electric cars a sport-car-like acceleration.

The energy-storage device for the electric car, the batteries usually give the car a range of 5-100 miles.

Since the motors can operate from 0 to 15000 rpm, most electric vehicle transmission have only one gear ratio.

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