How to calculate the displacement of the engine?

Firstly, the volume in the stroke is obtained according to the cylinder diameter multiplied by the stroke of the piston, and then the distance from the piston to the cylinder head when the piston is at the top dead center is calculated, and the volume of the combustion chamber is calculated, and the two are added together to obtain the total volume of the cylinder. If you have 4 cylinders, then multiply by 4 to get the displacement of this machine. For your information, hope, thank you!

VST=VSI=(VSTL - Displacement, I - Number of cylinders, D - Cylinder diameter mm, S - piston stroke).

Displacement (sweptvolume), a term used for hydraulic transmissions, refers to the volume of fluid sucked in or discharged per stroke or cycle.

Usually the displacement is large, and the energy released by the engine per unit time (that is, the chemical energy of the fuel is converted into mechanical energy) is large, that is, the "power" is good, just like a teenager boy is of course more efficient than a healthy adult. So those off-road vehicles and sports cars usually have a relatively large displacement.

The working volume through which the piston moves from top dead center to bottom dead center is called cylinder displacement; If the engine has several cylinders, the sum of the working volumes of all cylinders is called the engine displacement. It is generally expressed in liters. Engine displacement is one of the most important structural parameters, it is more representative of the size of the engine than the bore and number of cylinders, and many indicators of the engine are closely related to the displacement volume.

1. Piston diameter mm Piston diameter mm stroke mm is a fixed constant) 1000 (converted to CC number).

The stroke is the distance between the top dead center and the bottom dead center of the piston.

2. Pi, radius squared, high piston radius, piston radius, stroke, mm<>

Engine displacementGenerally, it is represented by vl: vl=vh i=(s* *d2 4)*4.

Where: VH cylinder working volume; i Number of cylinders.

Displacement is an important structural parameter that provides a comprehensive measure of the size of the engine. The performance indicators of the engine are closely related to the displacement, in general, the displacement of the car.

The bigger it is, the more power it has. The unit displacement is usually used as the basis for evaluating different engine sizes. The sum of the working volume of each cylinder in a multi-cylinder engine is called the engine displacement.

Engine displacement (engine displacement) is the sum of the working volume of each cylinder of the engine, the product of the displacement of a single cylinder vh and the number of cylinders I. The cylinder working volume refers to the volume of gas swept by the piston from top dead center to bottom dead center, also known as single-cylinder displacement, which depends on the cylinder bore and piston stroke.

Domestic Displacement Classification:

According to the standards of Chinese mainland, it is divided into: mini car (displacement of less than 1L), ordinary car (displacement of intermediate car (displacement of medium and high-end car (displacement of high-end car (displacement of more than 4L).

In the past, China was based on a planned economy.

The dominant country has a weak sense of market and a poor sensitivity. At that time, cars were sold according to the planned distribution model, and the class of cars was measured by engine displacement, which was divided into several categories: mini cars, ordinary cars, intermediate cars, middle and high-end cars.

Popular taxonomy: mainly based on **, supplemented by technical specifications. That is, cars with more than 200,000 yuan are called medium and high-end cars; 200,000 yuan and 150,000 yuan for intermediate cars; 150,000 yuan 100,000 yuan for ordinary cars; Less than 100,000 yuan is a mini car or an economic car.

Engine displacement = volume per cylinder Number of engine cylinders.

Displacement: A term used for hydraulic transmission, which refers to the volume of fluid drawn or discharged per stroke or cycle. Car displacement is an important parameter to measure a car.

The volume of space through which the piston moves from top dead center to bottom dead center is called cylinder displacement; If the engine has several cylinders, the sum of the working volumes of all cylinders is called the engine displacement, which is expressed in liters (L).

Engine displacement is one of the most important structural parameters, it is more representative of the size of the engine than the bore and number of cylinders, and many indicators of the engine are closely related to the displacement volume. Usually the displacement is large, and the energy released by the engine per unit time (that is, the chemical energy of the fuel is converted into mechanical energy) is large, that is, the "power" is good.

The tail of most domestic cars has a car model composed of pinyin letters and Arabic numerals, and its content includes the following three parts: the first part is composed of 2 or 3 pinyin letters, which is the code name to identify the enterprise name; Pinyin letters are generally followed by 4 Arabic numerals, the first number from the left is the model **, the middle two digits are the engine displacement of the model car, and there is a number behind the product serial number set by the company.

There are also some domestic cars, the tail does not have a standard model, but its displacement is generally written in the body or tail, such as Suzuki "Antelope 1300", its displacement is 1300cc, that is, liters. Another example is the Fiat "Palio", which is marked on the side of its body, which is their engine displacement, measured in liters. The FAW-Volkswagen "Audi" has a displacement at the rear of the car, such as "indicating that the displacement is liter with turbocharging," indicating that the displacement is liter.

Imported cars such as BMW, "BMW325i" is a BMW 3 series sedan with a displacement of liters, "BMW318i" displacement is a liter, and "BMW530i" is a BMW 5 series sedan with a displacement of liters. Mercedes-Benz's "S600" means the S-class car, the displacement is liters, and the S600 is used to maintain the tradition"E240" stands for E-Class sedan with a displacement of liters.

There are also some imported cars, whose displacement is at the rear of the car, and it is easy to distinguish, such as "etc., the unit is liters.

The classification of domestic cars is determined according to the size of the displacement. The displacement of the minicar is less than or equal to 1 0L; The displacement of ordinary cars is in the range of 1 0-1 6L; The displacement of the intermediate sedan is in the range of 1 6-2 5L; The displacement of mid-to-high-end sedans is within the range; The displacement of the premium sedan is more than 4 0 liters.

In today's high oil prices, fuel consumption per 100 kilometers has become an important indicator to measure the performance and economy of automobiles. Generally speaking, the larger the displacement, the higher the fuel consumption per 100 kilometers. But there can be no formula between the two, at least not the driver's control.

However, the following factors can be used as a relatively large weight as a reference for fuel consumption: displacement; curb weight; Full load mass; Actual working conditions of the engine**speed, output torque); Road conditions can be reflected by the real-time parameters of the engine. There are others, such as wind resistance, tires, etc.

But the most difficult to quantify, in addition to the human driving factor, is also the assembly process.

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Engine displacement = displacement of a single cylinder Number of cylinders Displacement of a single cylinder = (bore bore) 4 1000 stroke (unit cc).

The engine is the heart of the car, providing power for the walking of the car, and the power, economy and environmental protection of the car. To put it simply, the engine is an energy conversion mechanism, that is, the thermal energy of gasoline (diesel) is converted into mechanical energy by pushing the piston to work when the combustion gas expands in the sealed cylinder, which is the most basic principle of the engine.

All the structure of the engine is for the energy conversion service, although the engine has gone through more than 100 years of history with the car, whether it is in the design, manufacturing, technology or performance, control has been greatly improved, its basic principle is still unchanged, this is a rich creative era, those engine designers, constantly integrate the latest technology with the engine, turn the engine into a complex mechatronics product, so that the engine performance has reached a nearly perfect degree, The world's famous automobile manufacturers also regard the performance of the engine as the highlight of the competition, and pay more attention to energy consumption, exhaust emissions and other aspects related to environmental protection, so that people can enjoy the car culture leisurely, but also protect the environment and save resources.

Engine displacement = single-cylinder displacement Number of cylinders; Single cylinder displacement = (bore bore) 4 1000 stroke (unit cc), cylinder displacement is only an approximate value, generally higher than the target value, not exactly 48cc but certainly not more than 49cc. The bore refers to the diameter, and the unit is generally millimeters, so it needs to be divided by 1000.

Engine displacement = single-cylinder displacement Number of cylinders;

Single cylinder displacement = ( bore bore) 4 1000 stroke (unit cc) Generally speaking, the cylinder displacement is only an approximate value, which is generally higher than the target value, not exactly 48cc but certainly not more than 49cc.

The bore refers to the diameter, the unit is generally millimeters, and the unit conversion needs to be divided by 1000

The mass of gas discharged by the piston in the cylinder from the bottom dead center to the top dead center (one stroke). That is, the volume of space at the top and bottom dead center of the cylinder (one stroke). It is a few cylinders and several cylinders are added together, which is the total displacement of the car engine.

The displacement of the engine is not directly related to how often it is discharged, it is related to the speed. The four-stroke engine exhausts every two revolutions, which is a process of air intake, compression, work, and exhaust.

The cylinder working volume is multiplied by the number of engine cylinders.

Engine displacement Pi * radius squared * piston radius mm * piston radius mm * stroke mm number of cylinders.

= piston radius mm piston radius mm stroke mm * number of cylinders.

Displacement: Pi, Radius Squared, High, Piston Radius, mm Piston, Piston, Radius, Stroke, mm Number of cylinders.

Automobile displacement is the cylinder working volume refers to the volume of gas swept by the piston from the top dead center to the bottom dead center, also known as single cylinder displacement, which depends on the cylinder bore and piston stroke. Engine displacement is the sum of the working volume of each cylinder, which is generally expressed in milliliters (cc). Engine displacement is one of the most important structural parameters, it is more representative of the size of the engine than the bore and number of cylinders, and many indicators of the engine are closely related to displacement.

Engine displacement = single-cylinder displacement & times; Number of cylinders. Displacement of a single cylinder = (bore bore) 4 1000 strokes (in cc). Generally speaking, the cylinder displacement is only an approximation, generally above the target, not exactly 48cc, but certainly not more than 49cc.

Displacement = pi radius square height piston radius mm piston radius mm stroke mm number of cylinders engine displacement = pi * radius square * piston radius mm * piston radius mm * stroke mm * number of cylinders.

The larger the displacement, the higher the process requirements of the engine and the greater the output power. In layman's terms, the higher the power, the faster the car, the larger the displacement of the same series of cars, and the higher the general configuration. There are no odd or even displacements, and some displacements end in odd numbers.

Displacement is a unit of volume, so its unit should be ml, but also l, 1l = 1000ml, generally the car behind the t is the car has a turbocharger, the role is to improve the output of the car. The number on the back of a general car represents its displacement. The volume between the top dead center and bottom dead center of the piston moving in the cylinder is multiplied by the number of cylinders, which is the displacement of the car.

Taking the common four-cylinder as an example, the volume of a single cylinder is equivalent to the volume of a bottle of beer, basically 500ml. The larger the displacement, the more power the car has. The displacement plus the combustion chamber volume divided by the combustion chamber volume is the compression ratio.

If you want to answer how the displacement of a vehicle is calculated, you need to start with the structure of the engine. The total volume of the engine can be divided into working volume and combustion chamber volume. In a stroke, when the piston runs to the lowest position, this place is called the bottom dead center, when it runs to the top, this place is called the top dead center, the distance between the top dead center and the bottom dead center is called the piston stroke, and the volume corresponding to s is called the working volume.

The working volume multiplied by the number of cylinders is what we usually call the engine displacement, and the ratio of the total engine volume to the volume of the upper combustion chamber is what we call the compression ratio.

For example, the displacement of a car is that there are 4 cylinders, that is, the working volume of each cylinder is 500ml. Under the same conditions, the larger the engine displacement, the greater the engine dynamic parameters, and the better the performance. The T after the number stands for Turbo, L stands for Liter, and naturally aspirates without Turbo.

The engine with a t has better power than the engine without t, for example, the parameters of a turbocharged engine are about the same as those of a naturally aspirated engine, so it is basically impossible to judge who has better power based on displacement alone. But the engine of the T also has some disadvantages, such as complex structure, slightly expensive maintenance, and lag. Therefore, it is better to take T or naturally aspirate the engine.

It is also a matter of opinion.

The problem of car displacement is the most tangled when we choose a car, especially for novice drivers, the size of the car displacement directly affects the fuel consumption of our future driving, the choice is still to be cautious, how to see the size of the car displacement, for this problem we must pay attention to when choosing, the following summarizes some questions about the car displacement, so that we can be more convenient when choosing a car.