The three-position steering wheel means that the steering wheel ring is divided into three parts, that is, the steering wheel with three bars on it is the three-position steering wheel. This kind of steering wheel is often installed in luxury cars. In addition to the three-position steering wheel, the steering wheel can be divided into single, double and four positions.

Early vehicles generally used a single steering wheel, because the original car rarely included steering wheel assistance equipment, so the steering wheel would be heavy when driving safely, and sometimes it was necessary to turn the steering wheel by pulling the steering wheel. However, with the application of driving force bias, the single steering wheel has ended its historical mission, among which Aston George LagondaSeries is the representative car.

The two-piece steering wheel is similar to the one-piece steering wheel and is also used in the original vehicles, representing the new Mercedes-Benz S and Dongfeng Citroen C4. However, because the two-type steering wheel cannot support the installation of automobile airbags, it is difficult to see vehicles with two-type steering wheels in current cars. However, a two-piece steering wheel can be seen on some light trucks.

Generally speaking, cars now run slowly and smoothly on the three-four steering wheel. Which of the four steering wheels is better, or three? First of all, the three-position steering wheel is often used in some luxury cars. The three-position steering wheel has a simple structure and a corresponding aesthetic feeling, and it will be clearer when turning the steering wheel.

However, the big difference between the four-position steering wheel and the three-position steering wheel is that there is one more on a long strip, which is divided into two integrated steering wheels to become a four-position steering wheel, which is generally used in sports cars or super sports cars.

From the main parameters, there is no difference between the four-spoke steering wheel and the three steering wheels. The key to the three-position steering wheel and the four-position steering wheel lies in their different appearances and the same basic elements. And everyone's aesthetic is different. Some people think that the three-position steering wheel is more sporty, while the four-position steering wheel gives people a steady and practical feeling, which is more suitable for groups who like to improve their temperament.

Why not buy a three-cylinder car?

The three-cylinder engine has been questioned since its release. Many people are dissatisfied with the three-cylinder engine, and one of the key factors is that the three-cylinder engine vibrates very violently. But at this stage, many manufacturers have exposed the three-cylinder industry when the car system is updated. Perhaps everyone needs to learn to let go of prejudice, understand the basic principle of the three-cylinder engine, and figure out why the three-cylinder engine is still being questioned, but the manufacturers still stick to it.

Automobile engines have four cylinders, five cylinders, six cylinders, eight cylinders and twelve cylinders. Why is the three-cylinder engine shaken by so many people? The key is the structure of the three-cylinder engine.

At present, no matter how many cylinders there are, the automobile engine on the car is a four-stroke automobile engine with only one crankshaft. When the automobile engine is running, the piston rod will push the crankshaft to rotate. The crankshaft of a four-stroke automobile engine ignites only once every few revolutions per cylinder, that is, 720 degrees, so the ignition distance per cylinder of a four-cylinder engine is 180 degrees. The more cylinders, the shorter the ignition interval, and the fewer cylinders, the longer the ignition interval. The ignition interval of a three-cylinder engine reaches 260 degrees. In other words, the crankshaft of a three-cylinder engine is strongly pushed every 260 degrees, and the distance between the interaction forces is very long, so it will cause obvious vibration.

In addition, due to the left-right movement of the cylinder piston rod, reciprocating inertia force is added to the crankshaft. This reciprocating inertia force is divided into first order and second order. The first-order inertia force has long been offset by the counterweight on the crankshaft, while the second-order inertia force is caused by the speed difference between the crankshaft at 0~ 180 degrees and 180~360 degrees. Because the efficiency of crankshaft rotation is different, it will happen.

The second-order inertia force of a four-cylinder engine is that the test cylinders cancel each other out, while the three-cylinder engine is a single cylinder, so the way to cancel the second-order inertia force is to add a balance shaft which is meshed with the crankshaft gear and has twice the rotation speed of the crankshaft and is opposite to the rotation direction of the crankshaft.

Is a three-cylinder car worth buying?

At least from the current situation, it seems that the new car with a three-cylinder engine can hardly feel the vibration, but due to the increase of service time, both the three-cylinder engine and the four-cylinder engine will shake more and more, which is caused by the embrittlement of the engine primer and the damage of the internal parts of the automobile engine. In that case, why not recommend buying a three-cylinder car? After all, a three-cylinder engine still needs time to be certified. If you are going to start with a three-cylinder car, you'd better experience it yourself, or find a three-cylinder car buyer to master it.

Why is every manufacturer in the water three-cylinder machine that everyone can't avoid?

First, save costs. A three-cylinder engine has one less cylinder than the four-cylinder engine commonly used by everyone, and the corresponding parts will also be reduced.

Second, save energy and reduce consumption. Without the cylinder, the volume and mass of the automobile engine will be reduced accordingly, thus reducing the quality of the whole vehicle. But isn't lowering a cylinder reducing the driving force? Judging from the three-cylinder engines on the market, most of them are three-cylinder engines with turbochargers, and the driving force 1.0T or 1.3T can even exceed that of 1.5 or 1.6 four-cylinder self-priming engines.

Third, the current policy strikes. In recent years, China's working pressure on automobile exhaust is increasing, and the environmental protection standard of each upgrade is twice as strict as that of the previous generation, so the three-cylinder engine improves the indoor space.

Fourth, the freshness is attractive. Although the three-cylinder engine is criticized by people, it is still a relatively new thing in general. Moreover, a small amount of tail gas can achieve unexpected practical results, and many people are also gearing up. Naturally, manufacturers cannot ignore this opportunity. Whoever can create the user evaluation of the three-cylinder engine industry will become the highest big winner. What does a three-position steering wheel mean? Why not buy a three-cylinder car @20 19?