Why do some cars like to use three cylinder engines? What are the advantages and disadvantages of a

Reducing exhaust emissions: With the increasingly serious ecological and environmental problems, countries around the world are promulgating stricter environmental protection standards, so automobile companies are forced to try their best to reduce engine exhaust emissions and gasoline and diesel use. The use of a three-cylinder engine can significantly reduce exhaust emissions, which in turn will lead to more stringent environmental standards.

The net weight of the three-cylinder engine is lighter, which reduces the weight of the whole vehicle, and the net weight is reduced, and the fuel economy is improved, which in turn reduces exhaust emissions. Three-cylinder engines have smaller exhaust volumes and lower exhaust emissions. Control costs in a highly competitive market environment:

The use of a three-cylinder engine can definitely reduce the cost of raw materials for the whole vehicle, and the construction of the three-cylinder engine is simpler, and the total number of parts is smaller and smaller than that of the four-cylinder engine, which can control the cost.

Laying a solid foundation for the improvement of hybrid systems in the middle and later stages: Many automobile companies are still actively developing gasoline-electric hybrid vehicles, and many automobile companies have released plug-in hybrid vehicles. Hybrid vehicles need to have electric motors, and some hybrid vehicles have external motors.

Hybrid vehicles with such external electric motors must have as small the engine volume as possible, otherwise the electric motor will not fit into the narrow engine compartment of the car. The use of a three-cylinder engine overcomes this situation to the extreme.

Merit; Three-cylinder engines have 2 main advantages. First, the fuel consumption is relatively low, so in the case of less cylinder exhaust volume of course is small, and the fuel consumption will be reduced. The second feature is its small size and low weight.

The reduced volume allows for a more agile layout of the bonnet and even the cab, which is more flexible than a four-cylinder engine.

Disadvantages: Vibration, compared to the four-cylinder engine, the three-cylinder engine has the original engine shake due to the design flaw, which is also well known. It is precisely this point that makes many people daunted by three-cylinder engines such as the Buick Yinglang GT and the BMW 5 Series 1 Series, and they cannot avoid the common problem of chatter.

Noise: Noise is one of the common problems with three-cylinder engines. Manufacturers use better sound-absorbing materials in the cab to reduce noise by raising the acoustic cover on the bonnet, but it will still be visible outside the window.

The advantage of the three-cylinder engine is that the cost is low, and the disadvantage is that the stability is poor, so many manufacturers choose the three-cylinder in order to save costs.

The same displacement of the engine three cylinders is one less cylinder than the four cylinders, the amount of fuel injection will be reduced, the fuel consumption will be lower, the weight is light and the volume is small, the space is saved, the engine layout is more reasonable, the structure is reduced, all materials are also less, the manufacturing cost will also be reduced, the disadvantage is that the shaking vibration noise is large, due to the jitter vibration and unbalanced piston movement, the reliability is low.

When it comes to three-cylinder engines, you may first think of the problem of shaking, which will cause the floor pads supporting the engine to wear more easily, and the engine will be louder. But its advantages are also obvious: 1. Smaller turbo hysteresis; 2. Better low-speed torque; 3. Higher thermal efficiency; 4. Less mechanical friction, lighter weight, smaller volume.

Although the new generation of X-Trail unveiled at the Shanghai Auto Show this year is also equipped with a three-cylinder engine, it is different from the three-cylinder engine that uses the balance shaft on the market, Nissan Global has perfectly solved the vibration problem through a series of advanced technical means: first, at the source, Nissan's unique VCT multi-link perfectly solves the lateral vibration, and the external adaptive double balance system effectively solves the longitudinal vibration, which makes the engine not shake from the source; In addition, in the process of vibration propagation, CVT's centrifugal pendulum shock absorber, "floating" engine suspension system and other technologies can also reduce vibration; Finally, there is a high-performance sealing structure, thickened acoustic pads, double-layer acoustic glass, and ANC active noise cancellation system to further isolate vibration and noise.

Advantage 1Cost and emissions tax savings. The three-cylinder engine lacks a set of piston connecting rod valve mechanism, and the material savings brought by the small body weight reduction are considerable.

Doing small displacement can also save a few points of tax under Chinese and European regulations. However, this is not reflected in the price......

2.The most practical thing is that the fuel consumption of the whole vehicle is reduced after lightweight; Thanks to the small displacement, the fuel consumption of the engine is also reduced at low loads. The two are added to save a lot of fuel under comprehensive working conditions.

Hard injury: Insufficient torque at low speeds.

The small-displacement three-cylinder engines are equipped with a fairly mature turbo to achieve considerable power output. But when the vehicle starts, the turbo still doesn't come in handy. The small-displacement turbo car starting meat is the most intuitive impression.

Other figures look at the peak power of the three-cylinder turbo horsepower is not as good as the self-priming of the slightly larger displacement, but that number is forced out of the red line area of the rpm, in comparison, the turbo engine power of more than 1500 rpm stable torque output is more practical. In terms of overall power performance, the three-cylinder engine is not so unbearable.

As for the jitter, noise, etc., it has been optimized to a completely negligible level, so you don't have to worry too much. I really don't feel at ease to go for a test ride and test drive.

Advantages and disadvantages of three-cylinder engines.

Advantages: There are two main advantages of the three-cylinder engine. First, the fuel consumption is relatively low, and the displacement of the cylinder is naturally smaller, and the fuel consumption will also decrease.

The second advantage is that it is small in size and light in weight. The smaller size makes it possible to optimize the layout of the engine compartment and even the layout of the cockpit, making the layout more flexible compared to a four-cylinder engine.

Disadvantage 1: Jitter.

It is well known that three-cylinder engines are inherently idle-shaking compared to four-cylinder engines due to design flaws. It is precisely this point that makes many people shy away from three-cylinder engines, such as Buick Yinglang, BMW 1 Series, etc., which cannot avoid the common problem of shaking.

2. Noise. Noise is also a common problem with three-cylinder engines, and manufacturers have reduced noise by adding a soundproof cover to the engine compartment and using materials with better sound insulation in the cockpit, but it will still be noticeable outside the car.

3. Lack of power.

Although most three-cylinder engines now use turbocharging and direct injection, they will lack torque until the turbo is involved, which means that they will be a little weak at low speeds. In addition, the higher speed settings can lead to a gap between comfort and smoothness compared to a four-cylinder engine.

Is a three-cylinder engine good or not? The innate advantage of the three-cylinder engine makes the four-cylinder engine irreplaceable.

Hello, now the technology of the three-cylinder engine is still good, the tuning is excellent, the acceleration is fast and the fuel consumption is economical, but there will be jitter.

Merit;

The structure is simple, the manufacturing cost is low, and the energy efficiency of a single cylinder is high.

Compared with the four-cylinder engine, the three-cylinder engine lacks a cylinder, the structure is reduced, the material is less, and the space occupied is small, which not only saves manufacturing costs and space, but also reduces the vehicle curb weight. At the same time, under the same displacement, the energy loss is small, and the energy efficiency of a single cylinder is large.

Cons:

The vibration frequency and amplitude are high, the noise is large, and the stability is poor.

The three-cylinder engine is more eye-catching in terms of data, but because it only has three cylinders, the stability is far less than that of the four-cylinder engine. Just like lifting an object with your fingers, with the same weight, three fingers will make it painful, and four fingers will be much easier. This is the case with three-cylinder engines, where components such as crankshafts, pistons, and cylinder walls bear relatively large forces, and the structural stability is weak.

The angle of working next to each cylinder of the three-cylinder engine is 90 degrees; The working angle between the cylinders of the four-cylinder engine is 60 degrees, the smaller the inclination angle, the smoother the engine runs, and the less torque each cylinder bears, the smaller the vibration of the engine.

The working sequence of the four-cylinder engine is , and the four-cylinder works with two upper and two lower balances. The working sequence of the three-bar engine is no matter , 2 or , 3, and the distribution of the three pistons is always unbalanced because it is one up and two down, or two up and down, so the engine vibrates and makes noise.

The three-cylinder is not fuel-efficient, and the reliability is another matter, but the size is small, the cost is low, and the profit is high for the enterprise.

The three-cylinder engine meets the latest emission policy, the power can also be used, and the fuel consumption is also fixed

Advantages 1, the three-cylinder engine because of the lack of a cylinder, the weight is relatively small, and the occupied volume is relatively small 2, compared with the four-cylinder or six-cylinder engine, the production cost of the three-cylinder engine is lower Some disadvantages: 1. The power is weak, and there is one less cylinder.

2. Jitter, the unbalanced operation of the three cylinders will lead to the problem of jitter, in order to solve this problem, the manufacturer has installed a lot of rubber parts to alleviate the jitter problem, but it can not be the first jitter problem!

The advantage of the three-cylinder engine is that it is more fuel-efficient, and then it is also relatively light, but its disadvantage is that the power of the engine is not very high, and the kinetic energy is not very strong, the reason why many people do not like the three-cylinder engine, that is, the kinetic energy of the three-cylinder engine is not strong, and there is no strong driving experience, which is the reason why many people do not like the three-cylinder engine. <>

What you want to know is that the advantage of the three-cylinder cylinder engine is fuel saving, which is beyond doubt, because of the engine workmanship, it lacks a cylinder, so it does not use so much oil, but the shortcomings of the three-cylinder engine also have a lot, its balance is very poor, and then because the circulation system caused by the engine power is different, it is not able to drive very stable He is very easy to shake, this situation is very easy to occur for the three-cylinder engine is a reason, a situation, Then there is another situation of the three-cylinder engine because of the fact that there will be a lot of noise after shaking, which is not accepted by the general public, so the reason why the three-cylinder engine cannot be liked by the public is this. <>

The kinetic energy output of the three-cylinder engine is also very poor, and it must not meet the requirements of the four-cylinder engine, in this case, for the driving experience, it is difficult for ordinary people to accept, because everyone is used to driving the four-cylinder engine, and suddenly if you open the three-cylinder engine, you will feel that there is some uh feeling of not being able to do it, so the existence of the three-cylinder engine is completely unnecessary, and it is completely for the sake of selling lower. <>

The three-cylinder engine also has a lot of good advantages, it meets certain environmental protection standards, it is at the same time his engine is very, very fuel-efficient, lower than the ordinary development, more than double the fuel efficiency, but at the same time his displacement is also very small, can be in the city um very good mind, and now there is a certain emission credit policy, remember that there is no pressure at all, so if it is said that it is a person to drive, it is just a simple to go to work, travel after work, it is recommended to choose the three-bar level, However, if you actually buy a car, you still take your own needs as the standard, and if you use a family car, you must not buy a three-cylinder engine.

The advantage of the three-cylinder engine is that the power is strong and the fuel consumption is low, and the disadvantage of the three-cylinder engine is that the noise is high, because people like the traditional 4-cylinder engine and think that the performance of the three-cylinder engine is not good, so it is because of people's prejudice that they will not like the three-cylinder engine.

Advantages: light weight and small size. The three-cylinder engine has one less cylinder than the four-cylinder, and is better in weight and volume than the four-cylinder engine, making the interior layout more reasonable and easy to install the hybrid motor.

Cons: Jitter. The fatal flaw of the odd-numbered cylinder engine is first of all shaking.

Two people, a sedan chair, are not as safe as eight large cars. The piston movement produces a reciprocating inertia force, and the even-numbered cylinders just neutralize this reciprocating inertia force, but the odd-numbered cylinders cannot, which is why the odd-numbered cylinders will shake, while the five-cylinder engine has a large number of cylinders, which will reduce the impact of the remaining one cylinder, while the three cylinders can be imagined. One of the evaluations of many car owners on the three-cylinder engine, one of his power outputs can not meet most car owners, and it is more difficult to compare with the multi-cylinder engine, and the other is that it is noisy.

The disadvantages of the three-cylinder engine are probably these, shaking, weakness, noise.

Theoretically, an engine with one less cylinder would have less volume and less material, and the length of the cylinder block would be shorter. The layout of the engine would be better. It will reduce the weight of the car. The weight of the car with a three-cylinder engine will be very light, the fuel consumption will be relatively large, and the wear will be more severe.

Advantage: The three-cylinder engine has less turbo lag than the four-cylinder engine of the same displacement.

The three-cylinder engine has better low-rpm torque than the four-cylinder engine of the same displacement.

Among the models with a displacement of less than 3 cylinders, the thermal efficiency of the 3-cylinder car is higher.

Three-cylinder engine has less mechanical friction, lighter weight, smaller volume affected by the global wave of energy conservation and emission reduction, China's domestic emission requirements are becoming more and more stringent, the new generation of three-cylinder vehicles not only meet the current emission requirements, but also ensure the daily power demand, in line with the optimal principle of single-cylinder displacement, three-cylinder car in or within the passenger car market, its high efficiency, low fuel consumption and other characteristics make it more competitive. If you want to buy a three-cylinder car, I personally recommend Nissan's new generation X-Trail, which is equipped with VC-Turbo super-variable engine 300, with a rated power of 150kW, a maximum torque of 300N·m, and the lowest fuel consumption under comprehensive working conditions. Compared with the naturally aspirated engine of the current X-Trail, the power is increased by 13%, the torque is increased by 26%, and the fuel consumption is reduced by 24%.

This is mainly due to its world's original multi-link structure and variable compression ratio technology, the multi-link structure allows the engine to do the power stroke instantly, the piston moves vertically downward, without the power loss caused by the inclination angle of the traditional engine, counteracts 44% of the piston lateral force of the traditional engine, and solves the traditional three-cylinder vibration problem from the root; Equipped with variable compression ratio technology, the compression ratio can be intelligently switched between 8:1 (high performance) and 14:1 (high efficiency), and the power & fuel consumption can be optimized.

The new generation of X-Trail has opened pre-sale on June 28, and a total of 2 pre-sale levels have been launched, namely VC-TURBO 300 2WD with a pre-sale price of 10,000 yuan, and VC-TURBO 300 4WD with a pre-sale price of 10,000 yuan. Although the model version and configuration have not yet been fully announced, it will definitely have an advantage over competitors in the same class (the actual price, level, and configuration of the model are subject to the market release).