Auto Engine:inline 4-cylinder and V-type 6-cylinder

We have in the face of the market will find all kinds of car, car engines also have different styles and different techniques, many people have this question, in the end what the engine is the best?

What is the best engine in the end? From the market point of view, this is a so no one can accurately answer the question, because the car’s design principles in such an industry self-evident rules – just right!  Should pay attention to what a reasonable match nature of automotive design is to emphasize the best combination.

Although the automotive market, we have the luxury of power is not difficult to find some configuration examples, but not the mainstream of the development direction of cars, at present we are in the market the most common and also the people most frequently mentioned problem is that high-class car market, the most common form of in-line four-cylinder engines and V-type 6-cylinder, why is there such phenomenon?  How should we choose?

Here,  these two kinds of engines to conduct a comprehensive comparison:

1, the basic concepts.

 From the traditional sense, the six-cylinder engine to meet the needs of a larger displacement and more power as a design, it is generally six-cylinder engine’s displacement is greater than 4-cylinder engine, but due to in-line six-cylinder engine will make the length of difficult to place, so they gave birth to the cylinder was “V”-shaped layout of the engine, which is V-type 6-cylinder engine.

 V-type 6-cylinder engine, compared with the in-line 4-cylinder engine, although greatly reduced in length, but in comparison with the in-line 4-cylinder engine weight is still a weak one, because there must be two sets of air intake system V6 engine and two cylinder heads , parts, therefore the heavier the engine, while the four-cylinder machines can reduce the weight of even 30%.  However, the weight of a direct impact on the car’s power and economy, especially the fuel economy was seriously affected, which is lighter in the car today for further in-line 4-cylinder engine can still be an important factor in the main engine .

 2, technical features.

 Overall: V6 engine is more lenient, but generally shorter than the in-line four-cylinder engine, front-precursor used in most cars where the engine transversely mounted, the engine compartment it is very cramped space in the installation and maintenance convenience is obviously not as good as in-line 4-cylinder engine, V6-cylinder engine while the technical requirements for fixed mount much higher.

 Structure: in-line 4-cylinder engine of simple structure, coupled with the engine compartment when placed around the room more Graceful ease, so the air-cooled cylinder cooling is better.  Displacement in the same or close to, the four-cylinder machine to be bigger bore, the corresponding area of the combustion chamber will be bigger, V6-cylinder engine bore is small, the combustion chamber of each cylinder corresponding to the area to be small, in-line 4 Valve-cylinder engine with a simple layout, while cylinder block, cylinder head and crankshaft structure is relatively simple compared to the V6 engine is much more complex.

 Features: compared to a similar power in the l case, the in-line 4-cylinder engine speed slightly lower for power frequency is less than V6 engines, V6 engines to power it, good stability, while the in-line 4-cylinder engine to power a number of poor stability, in the high-speed operation of the engine speed on the road, the V6 engine is relatively smooth and noise less impressive, so common in-line 4-cylinder engines make more use of balancer shaft to improve its functioning smoothly, whereas added a balancer shaft in-line 4-cylinder engine running smoothness can be achieved with the V-type 6-cylinder engine is very close results. In addition, the in-line 4-cylinder engine running at low speed when the torque characteristics are better, more suitable for urban environments.

Use: In general, in-line four-cylinder engine can use a lower compression ratio, it is generally in-line four-cylinder engine can use low-grade gasoline, the economy is good.  In-line 4-cylinder engine versatility, the basic emission below 2.5 can cover all the products, while the V6-cylinder engine is only applicable to large displacement of the high-end cars, use of a small.  In-line 4-cylinder engine technology is mature, simple structure, easy to maintain, and performance is stable, while the V6-cylinder engine on the complexity of processing technology, the relative quality of factors of instability there is a little more.

Maintenance: As in-line 4-cylinder engine, simple structure, stable quality, maintenance facilities, have an advantage, while the V6-cylinder engine complex structure, maintenance, technical requirements are higher, quality is relatively difficult to guarantee, and the maintenance of higher prices.  In the routine maintenance costs, the in-line 4-cylinder engine maintenance and low cost advantages are obvious.  Currently, BMW is still using in-line cylinder engine technology.

3, the market forecast.

 Energy-saving environmental protection in recent years widespread appeal, as well as engine technology advances, especially as the engine of new electronic control technology, the rapid development of automobile engine displacement is also declining.  A small displacement, turbo-charged, multi-valve, variable valve timing, variable intake manifold, cylinder fuel injection and other technologies have become the future development of the typical technical characteristics of the engine. For now, many in-line 4-cylinder engine has reached or exceeded the V6-cylinder engine performance. In addition, from the present perspective of the development of international automobile industry, automobile industry has entered the era of little profit, which is bound to restrict their development investment in new high-performance inline four-cylinder engine will have a wider application value.

 4, some recommendations.

 As we stated earlier, different engines have different strengths and weaknesses, it is difficult to say who has the absolute advantage. Want to emphasize in particular is that we choose the engine when not necessary to choose the largest displacement, but be sure to choose the most appropriate; you may not power the biggest, but be sure to choose the most cost-effective; not necessarily have to Choose the most advanced technology, but be sure to choose the most reliable. I am particularly in favor of the Mazda Core-wing ideas advocated by the engine, practicality = actual use value.  In short, power, performance, energy saving, environmental protection, reliability, is a not small.

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