Definition of vehicle displacement (hydraulic transmission terminology): refers to the volume of fluid that is inhaled or discharged per stroke or cycle. Car displacement is an important parameter for measuring a car.
Definition of car lift power: Ramp power represents the utilization of the working volume per cylinder, which is the effective power emitted by the engine per litre of work volume. The greater the increase in power, the greater the power emitted by the unit cylinder's working volume (liter power = maximum power ÷ displacement), indicating that the more compact the engine, the greater the power. The magnitude of the boosting power is proportional to the product of the average effective pressure and the rotational speed. The increase in power indicates that the effective pressure is large and the rotational speed is high. The higher the pressure and the higher the rotational speed, the higher the other requirements for the engine are. Power, good engine power. When the engine power is constant, the higher the power is, the higher the weight efficiency of the engine is. The smaller the engine, the more the material is saved.
How to measure the performance of a car? The straightforward way to show the efficiency of the engine is to increase power. Rising power represents the power output per cylinder volume, that is, the power output per unit cylinder volume corresponding to the vehicle with higher power is greater. Then the same cylinder capacity of the car, the greater the power, the engine output power will be more; the same power of the car, or power up, its cylinder will be smaller than the power of the small car, or that the use of more materials.
The level of power rise reflects the quality of engine design and manufacturing. Embodying the quality of the engine mainly depends on dynamics and economy, which means that the engine must have good power, good acceleration, and low fuel consumption. High power means high output power at the same unit displacement. . There are many factors that affect the engine power and fuel consumption. Among them, the most influential factors are displacement, compression ratio, and valve distribution. But this is just a general term. Specific comparisons to engines often result in significant differences due to differences in use, design, materials, and manufacturing processes. The size of the boosted power directly affects the performance and quality of the engine and is an important parameter for identifying the engine performance of the vehicle.
Some engine powers with large displacements are not necessarily larger than those with smaller engine displacements. For example, in terms of displacement, a pickup car is a 2.8-liter displacement engine, but the maximum power is only 68 kilowatts; and a pickup car B is 2.0. The maximum displacement of the engine is 108 kilowatts. If diesel 2.8L is equivalent to gasoline 2.8L, the former diesel 2.8 has a specific power of 4.0 gasoline vehicles. It can be seen that the latter's displacement is smaller than the former, but its "ups power" is more efficient than the former. Therefore, the pickup engine is not as big as possible, but the higher the power, the better.
The national taxation on automobile purchases will be divided into 7 zones according to 1.0L, 1.5L, 2.0L, 2.5L, 3.0L, 4.0L, etc. The minimum tax rate can be as low as 1% and the maximum tax rate is still 20%. The higher the purchase tax, the higher the selling price is generally higher than the discharge. At present, the domestic mainstream brand pickup only has two diesel-engine pickup trucks with a displacement of 3.0L or more. One is Zhengzhou Nissan's Rui ZD30D13 and Jiangsu Kaiwei's K1.5 4DC2. The engine displacement of most other brand pickup trucks is generally between 2.2L and 2.8L. If it exceeds 3.0L, it will be subject to a higher purchase tax rate.
In addition, an important indicator to measure the performance of an engine is to increase power rather than displacement, reflecting the quality of the engine mainly depends on power and economy, which means that the engine must have good power, good acceleration and low With regard to fuel consumption, some engine powers with large displacements are not necessarily larger than those with smaller displacements. There are many factors that affect the engine power and fuel consumption. Among them, the most influential factors are displacement, compression ratio, and valve distribution. The index of the engine based on the output power of the crankshaft is referred to as the effective index, which indicates the level of the entire engine performance. Effective indicators include available power, effective torque, power up, and more. The two indicators of rising power and torque can reflect the merits of the engine. Because the power (N) is mainly determined by the product of the cylinder's average effective pressure (P) and rotation speed (n), that is, N = (P) × (n).
At the same time, the engine torque is another important indicator of engine acceleration. The reciprocating motion of the piston in the cylinder makes it perform a certain amount of work. Its unit is Nm. The work done at each unit distance is the torque, which is the force FX distance S. In the engine, force F × radius r = torque power P = work W ÷ time t P = F × s / t = F × speed v (crankshaft linear velocity V = crankshaft angular velocity ω × crankshaft radius r) So: power P = force F × radius r × angular velocity ω That is, power P = torque × angular velocity ω, obtained: Power P = torque × angular speed ω Therefore, the power of the engine can be calculated from the torque and the rotational speed. Therefore, under the condition that the angular velocity is constant, the greater the torque, the greater the power, and the greater the distance traveled in a unit of time, namely, the explosive force of the engine. Therefore, engine torque is a specific indicator of engine acceleration. The magnitude of torque is also related to engine speed. Under the premise of equal power, different speeds will have different torques. The higher the speed, the lower the torque, and vice versa.
In summary, to measure the degree of power of a pickup truck, it cannot be seen only in terms of its displacement (the size of the so-called “heartâ€), but mainly depends on the two indicators of rising power and torque that it launches. An important reference indicator for science. It is highly probable that there will be new energy sources that are more low-carbon, energy-saving and environmentally friendly. In the future, traditional fuel engines will be overturned and overturned. We will wait for the arrival of a new round of new energy automobile revolution.
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