Allium recently, several friends have asked the same question, he selected a car, engine displacement 1.8 and 1.5 you choose? Selected fear of waste oil, afraid of the power of the selected small enough, how should I weigh?
Today, onions and small partners to talk about engine emissions and engine performance, the relationship between power and fuel consumption.
First of all, we first have to understand what is the displacement of the engine.
Piston moves from TDC to BDC through the volume of space called the cylinder displacement, engine cylinder, then take a few, get engine displacement.
Generally, larger engine displacement, burning gas mixture, the more, the greater power and torque of the engine.
Displacement measure engine performance is one of the more important factors, not all of them. Real impact of automotive power and fuel consumption of three important factors.
1. vehicle weight
Weight is important cause affecting the power and fuel consumption, so auto makers around the world are trying to reduce the weight of cars. Especially like one of those electric cars, such as BMW's I-series, vehicle without plates using carbon fiber, is to make it lighter and more energy-efficient. Like the famous Lotus ELISE, the Coupe with a 1.8-liter naturally aspirated engine, but the acceleration in just 5.6 seconds per hundred kilometers, fuel consumption is only 7 liters per hundred kilometers.
2. drive efficiency
Power from the engine to the tires, take a long power transmission, where traditional efficiency, the higher the power the better, are more fuel-efficient. In this one, the most important is matching between engine and gearbox.
As a simple example, the Toyota Crown and Reiz, using a 2.5V6 and 6-speed automatic transmission. Engine does not advance, gear is not too much. But because of his excellent match, so that they will be kept at 10-11 fuel consumption per hundred kilometers. While some GM models, matching dragged its feet because transmission, acceleration performance and fuel consumption is not good.
3. engine technology
Engine is a fuel source, but engine technology for the overall fuel consumption and no more than two. In recent years most manufacturers for environmental exploration, launched the dream of the Earth science and technology (Honda), following blue sky (Mazda), high power (BMW) and other environmentally friendly technology brand. Engines, energy-saving and power is equated. Why do you say it? Because if you can be more fuel-efficient, it can increase emissions, greater power under the same fuel consumption.
Most of the engine by reducing cylinder wall friction, optimized air intake, change the injection to improve fuel efficiency. But need more advanced technology and better quality of gasoline, so at this point we should consider the actual situation of their own.
For different engines of the same car model, such as the Camry 2.0 and 2.5 difference in fuel consumption?
If the matching effect relatively consistent fuel consumption difference is 1 litre per hundred kilometers or so. But also based on usage may be. In simple terms, the traffic jams worse the more, because in the case of idling or low speed, large displacement cars more fuel would be wasted, and rapid acceleration or running high-speed, two-engine can ignore description.
In fact, the most important point, road conditions and your driving habits and fuel more.
Finally, we get the question back to the beginning user, same car, 1.5 and 1.8 of this relatively small displacement models, onion is recommended for most users choice the greater the emissions is not bad money, because every foot of power this thing is real, not chicken as useless configuration. Buy this just like home and buy air conditioning and TV, just bought when I feel fit, longer feel inadequate.
Relatively greater displacement (3.0 or above), if not late fees, and vehicle and vessel usage tax, of course, you can also choose to, after all, large-displacement is still very cool. (Local you deserve)
But for women, the elderly, or have no requirements for power of the people, or small displacement would be nice.
Dynamical sufficiency, spring onions, are enough. Manufacturers to set car engine policy, between large and small displacement is not enough difference, just the difference between comfortable and uncomfortable.
Bunkers of knowledge and also want to see more cheats please? In the "auto onion rings" micro public reply, ' Turbo ', ' power ' and ' fuel ' keywords, there will be more! August car sales chart style mutation Jetta was
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