Trade data-driven inventory optimization

List of catalogs in this article:

• 1, What is the difference between a car three-cylinder and a four-cylinder
• 2、What does a 4-cylinder car mean
• 3,Trade data-driven inventory optimization How to distinguish a car with three-cylinder and four-cylinder
• 4, What are the models of cars with in-line four-cylinder engines?呢
• 5, four The difference between cylinder cars and six-cylinder cars
• 6, At present, domestic car companies use more three-cylinder or more four-cylinder engines

What is the difference between three-cylinder and four-cylinder in a car

1. The number of cylinders is different: a three-cylinder engine has three cylinders; a four-cylinder engine has four cylinders. The structure is different: the structure of the three-cylinder engine is simple, small in size, light in weight and easy in layout; the structure of the four-cylinder engine is relatively complex.

2. Compared with four-cylinder engines, the three-cylinder engine has smaller exhaust interference. With small inertia turbine technology, the three-cylinder engine will have better low-turn torque and smaller turbine delay than the four-cylinder engine.

3. The difference between a three-cylinder engine and a four-cylinder engine is that the displacement and the number of cylinders are different. The displacement is different. Most of the displacements of 3-cylinder engines are less than 1 liter; the displacement of 4-cylinder engines is 1 to 5 liters.The number of cylinders is different: the number of cylinders in a 3-cylinder engine is 3; the number of cylinders in a 4-cylinder engine is 4.

4. Different structures: the structure of the three-cylinder engine is simple, small in size, light in weight, and easy to lay out. The structure of the four-cylinder engine is relatively complex, and there is one more cylinder. The three-cylinder engine has one less cylinder than the four-cylinder engine in terms of structural design, and the corresponding camshaft accessories are also fewer.

5. Its balance is different, and the ignition interval is also different. In the displacement range of 0L-5L, because the number of three cylinders is lower than that of the four-cylinder engine, the single-cylinder volume of the three-cylinder engine with the same displacement is larger, but the power is better at low speed. The number of cylinders is small, the mechanical friction is small, the number of cylinders is large, and the efficiency of a single cylinder is reduced.

6. First of all, there is the difference between the engine. The cylinder block of a three-cylinder engine is a three-piston sleeve with three pistons, while the four-cylinder is a four-piston cylinder with four pistons.The advantages and disadvantages of a three-cylinder engine are that because there are only three cylinders, the engine can reduce the volume and quality of the entire cylinder, thereby improving power performance and reducing fuel consumption.

What does car 4-cylinder mean

Four-cylinder cylinder refers to a cylinder that guides the piston to make linear reciprocating movement in the cylinder. Metal parts, so four-cylinders refer to four such cylindrical metal parts.This metal part is called an engine in a car engine, so a four-cylinder engine can also be called a four-cylinder engine.

The cylinder of the cylinder refers to the cylindrical metal part that guides the piston to move in a straight line in the cylinder, that is to say, 4 cylinders refer to 4 such cylindrical metal parts. This metal part is called an engine in the engine of a car, so a 4-cylinder engine can also be called a four-cylinder engine.

Four-cylinder engines usually convert chemical energy into mechanical energy. Sometimes engines are used in generators or entire machines, including power plants, such as gasoline engines or aircraft engines. The main part of the engine is the cylinder, which is the power source of the whole car.

Inline four-cylinder engine is referred to as l4 engine. Inline four-cylinder engine is four cylinders arranged in a straight line. Many cars will use inline four-cylinder engine.Some cars will also use V-type engines and W-type engines. The V-type engine has two rows of cylinders, and there is a certain angle between these two rows and four cylinders.

The number of cylinders of a car refers to the cylinder composed of several cylindrical empty cylinder blocks arranged in the engine, which is the number of cylinders of the car engine. For example, three cylinder blocks are 3 cylinders, four cylinder blocks are 4 cylinders, and so on. Several cylinder blocks are several cylinders.

Four cylinders mean that the engine has four cylinders, and in-line means that the four cylinders of the engine are arranged in order from front to back, and the center line of the four cylinders is on a plane. Horizontal position refers to the horizontal arrangement of the engine in the engine compartment (the center line of the crankshaft is 90 degrees with the car body).

How to distinguish three-cylinder and four-cylinder cars

1. Different balance: For a 4-stroke engine, the main difference between a three-cylinder engine and a four-cylinder engine is that the balance is different. The balance of the three-cylinder engine is not as good as that of the four-cylinder engine. The ignition interval is different: the ignition order of the three-cylinder engine is generally 1-3 - the ignition interval angle is 240 degrees.

2. The number of cylinders is different: the three-cylinder engine has three cylinders; the four-cylinder engine has four cylinders. The structure is different: the structure of the three-cylinder engine is simple, small in size, light in weight and easy in layout; the structure of the four-cylinder engine is relatively complex.

3. The method of judging the three-cylinder and four-cylinder of a car; check the number of high-pressure ignition coils. Three cylinders have three ignition coils, and four cylinders have four ignition coils. Check the number of intake and exhaust pipes. The three-cylinder engine has three exhaust manifolds and intake manifolds, and the four-cylinder engine has four exhaust manifolds and intake manifolds.

4. It is mainly manifested in three aspects: the first is the number of cylinders at the mechanical level, and the three-cylinder car is one less than the four-cylinder car. At the level of mechanical mechanism, the main difference between the three-cylinder and four-cylinder of a car is the number of cylinders. Because the three-cylinder engine has one less cylinder than the four-cylinder engine, the size of the engine will be smaller.

What are the models of cars with in-line four-cylinder engines

First, let's take a look at the field of luxury cars. Mercedes-Benz C180, BMW 320i, Audi A4L, etc. all use in-line four-cylinder engines. These models have excellent power performance and high fuel economy, which is the favorite choice of many consumers. Next, let's take a look at the small car market.

Among the above brands, the application models of in-line four-cylinder engines include Hyundai's Elantra, Toyota's Corolla, Honda's Civic, Volkswagen's Golf and Ford's Focus.

The Toyota Corolla is equipped with an in-line four-cylinder 8L engine and dual VVT-i technology. The model of this engine is VVT-i. The overall power is good, the speed is fast, but the start is slow and the engine noise is low.

In-line 4-cylinder engines are widely used, such as minivans, vans, cars, generators, small excavators, small bulldozers, small loaders,... For specific models, please refer to the "Baidu website".

The difference between four-cylinder cars and six-cylinder cars

A car engine displacement of 1 to 5 liters is generally a 4-cylinder engine, and an engine of about 3 liters is generally a 6-cylinder engine. The four-cylinder engine is characterized by small size, simple structure and easy maintenance. The displacement of more than 5L generally adopts a multi-cylinder design, including in-line six-cylinder, such as BMW.

Compared with the four-cylinder car, the six-cylinder car has two more cylinders to work. Although the technology is relatively good now, the power can be increased through turbocharging, multi-bale, variable timing device and other technologies. The power output provided by the cylinder is the most direct.

The engine displacement is different. Engine displacements are different from 1 to 2.5 liters, generally a 4-cylinder engine, an engine of about 3 liters is generally a 6-cylinder engine, an 8-cylinder engine of about 4 liters, and a 12-cylinder engine of more than 5.5 liters. The cylinder diameter is different.

At present, domestic automobile enterprises use more three-cylinder or four-cylinder engines

In terms of sales, the sales growth trend is obvious. The reason why automobile manufacturers prefer three-cylinder cars is not only because of the low production cost, but also because of the power performance of three-cylinder cars and Four-cylinder vehicles of no less than the same volume, while controlling atmospheric pollution, better respond to the call of the earth to achieve "three" birds with one stone and two birds.

In fact, there are many solutions to meet the emission standards. It is not uncommon to use 5L6L four-cylinders to meet the national six standards, but the research and development cost is higher. Therefore, car companies prefer to use three-cylinder engines with simpler structures and lower costs.

SAIC General Motors' enthusiasm for three-cylinder engines is obvious, and it is also the earliest inDomestic automobile enterprises have begun to apply three-cylinder engines on a large scale, but they have also encountered some ups and downs, which can be regarded as "paving the way" for other automobile enterprises.