Tuesday, May 10, 2011

Hybrid Engines typically

 Hybrid Engines arecc described as engines with two power sources. The most common today is a hybrid gas-electric engine that combines the low pollution output of an electric engine, with the high power output of a gas engine.

There are as many gas-electric engines as there are hybrid cars. Each engine is designed to allow the gas engine and the electric engine to connect to the drive train to power the engine.

The gas engine and the brakes are used to recharge the battery for the electric engine eliminating the need to plug in overnight, as is necessary for a plug in electric only engine. When braking, some of the energy being expended to stop a car is collected by the regenerative brakes in an electric engine.

Are All Hybrids Created Equal?

There are several ways in which electric motors and a gas/petrol engine can be combined.

Toyota perfected the series/parallel or "full" hybrid to deliver the energy-saving benefit of a series hybrid together with the acceleration benefit of a parallel hybrid. Two key technologies — the power split device and sophisticated energy management — make this possible. They constantly optimize the flows of mechanical power and electric power for safe and comfortable vehicle operation at the highest possible efficiency.

gas engines

Typically, in a full hybrid, the electric engine takes control when the car is cruising, at stop, or when slowly accelerating. When extra power is needed, the gas engine kicks in to give the acceleration expected from today's cars. By allowing the electric engine to take over, hybrids are able to get higher mpg than their sister cars with gas only engines. But since most of the energy is collected/saved when the car is stopped or in braking, hybrid cars tend to get better mileage in city driving. Which is opposite what gas only cars should expect, as gas engines are most efficient at high speeds (highway).

When comparing hybrid cars to plug-ins, hybrid engines have not only eliminated the need for plugging in, they have also increased the range that is possible.

Hybrid Engines

Hybrid Engines are typically described as engines with two power sources. The most common today is a hybrid gas-electric engine that combines the low pollution output of an electric engine, with the high power output of a gas engine.

There are as many gas-electric engines as there are hybrid cars. Each engine is designed to allow the gas engine and the electric engine to connect to the drive train to power the engine.

The gas engine and the brakes are used to recharge the battery for the electric engine eliminating the need to plug in overnight, as is necessary for a plug in electric only engine. When braking, some of the energy being expended to stop a car is collected by the regenerative brakes in an electric engine.

diesel-electric

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. In fact, 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. Most hybrid cars on the road right now are gasoline-electric hybrids, although French car maker PSA Peugeot Citroen has two diesel-electric hybrid cars in the works. Since gasoline hybrids are the kind you'll find at your local car dealership, we'll focus on those in this article.

hybrid cars

Have you pulled your car up to the gas pump lately and been shocked by the high price of gasoline? As the pump clicked past $20, $30, $40 or even $50, maybe you thought about trading in your car for something that gets better mileage. Or maybe you're worried that your car is contributing to the greenhouse effect.
The auto industry has the technology to address these concerns. It's the hybrid car. There are a lot of hybrid models on the market these days, and most automobile manufacturers have announced plans to manufacture their own versions.
How does a hybrid automobile work? What goes on under the hood to give you 20 or 30 more miles per gallon than the standard automobile? And does it pollute less just because it gets better gas mileage? In this article, we'll help you understand how this technology works, and we'll even give you some tips on how to drive a hybrid car for maximum efficiency.

How Hybrids Work

Hybrid-electric vehicles (HEVs) combine the benefits of gasoline engines and electric motors and can be configured to obtain different objectives, such as improved fuel economy, increased power, or additional auxiliary power for electronic devices and power tools.
Some of the advanced technologies typically used by hybrids include
  • Regenerative Braking. The electric motor applies resistance to the drivetrain causing the wheels to slow down. In return, the energy from the wheels turns the motor, which functions as a generator, converting energy normally wasted during coasting and braking into electricity, which is stored in a battery until needed by the electric motor.
  • Electric Motor Drive/Assist. The electric motor provides additional power to assist the engine in accelerating, passing, or hill climbing. This allows a smaller, more efficient engine to be used. In some vehicles, the motor alone provides power for low-speed driving conditions where internal combustion engines are least efficient.
  • Automatic Start/Shutoff. Automatically shuts off the engine when the vehicle comes to a stop and restarts it when the accelerator is pressed. This prevents wasted energy from idling.