What is a car drive?

Question 1: What does the drive of the car mean? In English, drivers are called "drivers", which means "drivers". The understanding of driver can be likened to: a computer component, such as a sound card, is like a truck; After the production is completed, the customer buys it and puts it on the road (installed in the computer). Without the driver, it will not move (normal operation). Only with a very familiar driver and the driver's license (Microsoft certification) can the car (sound card) run normally.

Rear drive means that the driving force of the car is at the rear wheel, and four-wheel drive means that all four shafts are driven (generally only off-road), like most of our cars are front-wheel drive.

There are front drive, rear drive and four-wheel drive, and four-wheel drive is the best safety performance.

All drive types, such as front drive, are engine-driven front wheels, front wheels are traction, rear wheels are traction, and four-wheel drive is four-wheel traction.

They each have their own advantages. The precursor is not easy to slip and the production cost is the lowest. At present, most cars use rear drive, which has good handling. For example, most BMW series are rear drive. If the ice and snow road is the safest, of course, all four-wheel drive off-road vehicles are four-wheel drive.

Question 2: What is the type of car drive? The four-wheel drive with front drive and rear drive has the best safety performance.

All drive types, such as front drive, are engine-driven front wheels, front wheels are traction, rear wheels are traction, and four-wheel drive is four-wheel traction.

They each have their own advantages. The precursor is not easy to slip and the production cost is the lowest. At present, most cars use rear drive, which has good handling. For example, most BMW series are rear drive. If the ice and snow road is the safest, of course, all four-wheel drive off-road vehicles are four-wheel drive ~

Question 3: What is the principle of car driving? After the fuel is ignited in the closed container, the energy explodes, the piston does work, and then the wheel is driven to rotate through the transmission mechanism, so that the driven wheel moves forward or backward after being driven. This is the simplest principle of car driving. The basic concept of automobile driving mode refers to the arrangement of engine and the form of the number and position of driving wheels. Generally, vehicles have front and rear rows of wheels, among which the wheels directly driven by the engine to rotate so as to push (or pull) the car forward are the driving wheels. The driving mode of automobile has an important influence on the performance, shape and internal size, weight, axle load distribution, manufacturing cost and maintenance of the whole vehicle. Choosing the driving type scientifically and reasonably is one of the primary tasks of the overall design of the automobile. According to the number of driving wheels, the most basic classification standards of automobile driving modes can be divided into two categories: two-wheel drive and four-wheel drive. 1. Two-wheel drive In the form of two-wheel drive, according to the position of the engine in the vehicle and the position of the driving wheel, it can be further subdivided into front and rear drive (FR), front drive (FF), rear drive (RR) and center drive (MR). At present, two-wheel drive off-road vehicles and cars are most commonly used in the form of front and rear drive. Front and rear drive (FR) is called front engine rear wheel drive, which is a more traditional drive form. The front wheel is responsible for steering and the rear wheel is responsible for driving the whole vehicle. In this driving form, all the power output by the engine is transferred to the rear drive axle to drive the rear wheel, so that the car can move forward. That is to say, in actual driving, the rear wheel pushes the front wheel to drive the vehicle forward. Compared with other driving forms of two-wheel drive, front-rear drive has great advantages. When the vehicle starts, accelerates or climbs on a good road, the adhesion pressure of the driving wheel increases, and the traction force is obviously better than that of the predecessor. At the same time, the front and rear drive vehicles also have good handling stability and ride comfort, which is conducive to prolonging the service life of tires. In addition, the arrangement of front and rear drive makes the engine, clutch and transmission of the vehicle close to the cab, which simplifies the arrangement of the control mechanism and the structure of the steering mechanism and is more convenient for the maintenance and repair of the vehicle. Based on the above advantages, domestic BMW 325i, 530i and more upscale imported BMW cars, Bentley, Mercedes-Benz, Jaguar and many other luxury cars mostly adopt the form of front and rear drive. 2. Four-wheel drive However, if the motive of buying an off-road vehicle is to ride freely in the real jungle of Shan Ye, you must not feel bad about the price difference, and you must arrange the four-wheel drive system neatly no matter how cruel you are. Because, even on good roads, two-wheel drive vehicles may slip when they encounter snow or slippery roads, and it is easy to flick their tails when they start to accelerate. Four-wheel drive can prevent this. At the same time, the four-wheel drive system has better application efficiency of engine driving force than the two-wheel drive system, and can achieve better tire traction and steering force. As far as safety is concerned, it can also form better driving stability. The so-called four-wheel drive means that the front and rear wheels of the car have power, and the engine output torque can be distributed to all the front and rear wheels in different proportions according to different road conditions, thus improving the driving ability of the car. Generally represented by 4X4 or 4WD. If you see the above words in a car, it means that this car has four-wheel drive function. In the past, four-wheel drive was unique to off-road vehicles. In recent years, some high-end cars and luxury sports cars have gradually increased this configuration. Four-wheel drive can be divided into the following categories: 1 and part-time four-wheel drive. This is a four-wheel drive system, and the driver can manually choose two-wheel drive and four-wheel drive. The driver can change the two-wheel drive or four-wheel drive mode by opening or closing the transfer box according to the road conditions, which is also the most common driving mode for general off-road vehicles or four-wheel drive SUVs. The most obvious advantage is that you can choose driving mode according to the actual situation, which is more economical. Use two-wheel drive gears when driving on the expressway; When encountering rain and snow road conditions, choose four-wheel drive to enhance the adhesion and handling of the vehicle. 2. Full-time four-wheel drive (full-time 4WD) This transmission system does not require the driver to choose to operate. The front and rear wheels always maintain the four-wheel drive mode. When driving, the engine output torque is set to 50: 50 for the front and rear wheels, so that the front and rear wheels keep the same torque. The full-time driving system has good driving controllability and tracking performance. With the full-time four-wheel drive system, it can be used on paved roads. > & gt

Question 4: What do you mean by front drive and rear drive? The front wheel of a car is the front driving wheel, only the first two wheels have power, and the last two are driven wheels, but there is no power. The rear drive is opposite to the front drive.

Question 5: What kinds of driving forms are there and what are their advantages? The so-called driving form refers to the arrangement of engines and the number and position of driving wheels. As we know, the general car has two rows of wheels, one of which is the driving wheel, which is directly driven by the engine, thus pushing (or pulling) the car forward. According to the position of the engine on the vehicle and the number and position of the driving wheels, there are many driving forms of the vehicle.

Generally, the four-wheel drive forms of automobiles are as follows: front rear drive (FR), front front drive (FF), rear rear drive (RR), middle rear drive (MR) and quattro. Among them, front rear drive (FR) and front front drive (FF) are commonly used in civil cars at present, and the four-wheel drive form has also begun to appear in cars recently.

Front and rear drive (FR): The so-called front and rear drive refers to the driving form of front engine and rear wheel drive. This is a traditional form of driving. Guangzhou Peugeot, which is familiar to Guangzhou people, is a typical front-mounted rear-drive car. In this type of car, the front wheel is responsible for steering and the rear wheel is responsible for driving. The power output by the engine is transmitted to the rear drive axle through the clutch, transmission and transmission shaft to drive the rear wheel to make the car move forward. Metaphorically speaking, it is to "push" the car forward. Front-and-rear drive vehicles tend to oversteer when turning.

Advantages of front and rear drive: front and rear wheels perform their respective functions, steering and driving are separated, high-speed stability is good, vehicle climbing ability is strong, and load distribution is uniform.

Disadvantages of front and rear drive: The biggest disadvantage is that the existence of the drive shaft makes the middle of the car floor bulge, which affects the space and layout of the car and increases the weight of the car. The increase of the drive shaft also increases the power loss.

Due to the inherent shortcomings of front and rear drive, this drive form is not used in most small and medium-sized cars at present, but most luxury cars will still use this drive form in pursuit of driving performance, such as BMW's full train.

Front drive (FF): The so-called front drive refers to the driving form of front engine and front wheel drive. This is a driving form that really rose after 1960s and 1970s and was technically perfect. At present, most small and medium-sized cars adopt this driving form. It integrates the transmission and the drive axle, and is fixed next to the engine, which directly transmits power to the front wheels to drive the vehicle forward, which is figuratively speaking, "pulling" the vehicle forward.

Advantages of front drive: simple operating mechanism and good heat dissipation condition of engine; The space inside the car is large and easy to arrange; The frame does not need to make room for the rear drive axle, which can reduce the height of the body; It saves a long transmission shaft, reduces the weight of the whole vehicle, shortens the power transmission distance and reduces the power transmission loss.

Disadvantages of the front drive: because the front axle is responsible for steering and driving at the same time, the high-speed stability is poor; Driving wheels are easy to slip when going uphill, and easy to roll over when going downhill at high speed.

Quattro(r) Four-wheel Drive Principle When the vehicle adopts full-time four-wheel drive and Torsten differential (vertical engine) or electro-hydraulic multi-disc clutch (horizontal engine), the driving force is distributed among the four wheels. Due to the weakening of the longitudinal force, the lateral force transmitted by each wheel to the quattro drive device is enhanced. Compared with the traditional drive device, this greatly improves the safety reserve limit. Under normal circumstances, if it is beyond the safe range, the working condition of the vehicle is basically neutral, that is, it will not understeer or oversteer.

Four-wheel drive of off-road vehicles, because off-road vehicles are all four-wheel drive. Let's talk about the principle of four-wheel drive. When turning, there must be a difference in speed between the four wheels. If the driving force is foolishly distributed to all wheels, there is no speed difference and the vehicle cannot move forward at all. The differential absorbs the wheel speed difference. All four-wheel drive vehicles have front, middle and rear differential devices (attention! This is a differential, not a differential lock.

Every advantage has a disadvantage. Although the differential can make the four-wheel drive turn smoothly, when one wheel slips, the other wheel will lose its driving force, but the slipping wheel cannot advance in vain. At this time, the differential lock is needed to lock the slipping wheels and transfer all the driving force to the wheels without slipping, so that the vehicle can escape from danger.

Question 6: What is the difference between the front drive and the rear drive of a car? At present, the driving forms of passenger cars are mostly divided into front drive, rear drive and four-wheel drive.

Front-wheel drive: it is the driving form of front-wheel drive, which literally means "pulling" the vehicle forward. At present, most small and medium-sized cars adopt this drive form.

Advantages: Because the front drive control structure is relatively simple and the manufacturing and maintenance costs are relatively low, the front drive mode has been widely used in ordinary cars.

Disadvantages: When the front-wheel drive is accelerating or going uphill, the center of gravity of the car body moves backward, so the contact between the front wheel and the ground will be relatively small, thus reducing the adhesion, so the traction obtained will be greatly reduced; In addition, the front driver will concentrate the weight of the car body on the front of the car, which will make the proportion of the whole car unbalanced, thus affecting the dynamic handling and balance of the car body.

Rear wheel drive: This is a traditional drive form, which literally means "pushing" the vehicle forward.

Advantages: General handling is good, because some parts move forward to the rear, which greatly improves the balance and handling of the car, which is why most sports cars adopt rear drive.

Disadvantages: considering the handling and safety of the vehicle, the front drive is easy to understeer when turning, and the rear drive is easy to oversteer.

Four-wheel drive: Originally mainly used for off-road vehicles, it is now popular in some cars, most typically some models of Subaru and Audi.

Advantages: Four-wheel drive is a more balanced driving mode, which can effectively avoid understeer and oversteer.

Disadvantages: Because the engine torque is distributed to the front and rear wheels, part of the power is sacrificed and the fuel consumption is higher. As an ordinary consumer, it is hard to say that there is a clear difference in daily use.

Question 7: What is automobile driving technology? What the hell does that mean? Driving sources: gasoline, diesel oil, electricity and liquefied gas.

Driving mode: front drive, rear drive, four-wheel drive and intelligent four-wheel drive (automatically distributing the power ratio of front drive and rear drive).

New technologies now used for driving:

1 hybrid oil and electricity (if a generator is added, it can be driven by electricity, saving fuel and protecting the environment)

Power compensation (such as fully atomized intelligent EFI, which can make the engine burn more fully, improve power and reduce emissions).

3 Energy recovery (for example, reducing the burden on the engine when charging the battery)

4. Electronic parking (for example, the engine is automatically turned off to save fuel).

5 Turbocharging (for example, instantaneous power boost enables cars to use smaller displacement engines and reduce fuel consumption).

5 pure electric (battery car, everyone knows)

Question 8: What does the driving force of a car mean? Yes, some cars are front-wheel drive and some are dual-drive, that is, both front and rear wheels are driven.

Question 9: What does the drive of the car mean? Yes, some cars are front-wheel drive and some are dual-drive, that is, both front and rear wheels are driven.

Question 10: What is the difference between front drive and rear drive? Features of the predecessor: 1, Advantages: 1) Low-cost manufacturers should first consider the cost when designing and producing cars. Compared with the rear drive, the front drive design is lower in design and assembly. The front drive does not need a rear transmission shaft and a rear gearbox, and the transmission system is different from the rear drive, with fewer and more concentrated parts. This makes other parts of the car, such as braking system, oil circuit and exhaust system, easily arranged in the lower part of the car. 2) Reduce the weight with the same displacement and horsepower. The lighter the car itself, the easier it is to accelerate, and the shorter the braking distance, the more fuel-efficient. Compared with the rear drive, the front drive has fewer and simpler mechanical parts, so it can reduce a lot of weight. Moreover, because the weights of the engine and the drive axle are loaded on the front wheels as driving wheels, it is helpful to improve the traction of the car and is very beneficial on flat roads. 3) Increase the internal space. The front drive does not need to leave space for the rear drive equipment on the floor like the rear drive, so the space is more used. Disadvantages: 1, the biggest disadvantage of the manipulated predecessor is operability. The ideal weight distribution between front and rear is 50: 50, but it is rare and difficult for front-drive cars to do this. Because the weight of the rear part becomes very light relative to the front part in the part concentration. It is easy for the rear wheels to lose grip, especially on wet roads. 2. The front wheel load is too large. The front wheels are responsible for traction and steering. Too many tasks can't be perfect and the steering is not accurate enough. When accelerating and braking, the front axle is overloaded, and it is more obvious to look up and nod, which affects comfort. Rear-wheel drive: Cars used to be driven by rear wheels, but now trucks are still driven by rear wheels. 2. Easy-to-maintain front and rear drive arrangement also makes the engine, clutch, transmission and other assemblies close to the cab, which simplifies the arrangement of the control mechanism and the structure of the steering mechanism and is more convenient for vehicle maintenance and repair. 3. Compared with other two-wheel drive, the front-mounted rear-drive has higher adhesion pressure and better traction when starting, accelerating or climbing on good roads. At the same time, the front and rear drive models also have good handling stability and ride comfort, which is conducive to prolonging the service life of tires. Disadvantages: 1, high cost, many rear-drive parts, complicated assembly and reduced internal space. However, with the adoption of independent rear wheel suspension system, the rear wheel drive space has a lot of room for improvement. 2. Insufficient traction Although some parts have been moved to the back, the weight acting on the driving wheel (rear wheel) is still relatively light compared with the previous generation, and the characteristic of traction is that the greater the weight acting on the power point (driving wheel), the more stable the traction will be, so insufficient traction has always been a problem of rear drive. 3. Power loss The power generated by the engine is transmitted to the rear axle through the transmission shaft, and the output power will be lost. These are static analysis of the difference between front drive and rear drive under ordinary driving conditions. As for the difference between the understeer of the front drive and the oversteer of the rear drive, it will only appear under extreme driving conditions. As an ordinary consumer, it is difficult to say that there is a significant difference in daily use. The front drive must have the engine level, the engine should be placed vertically, and the power should be wound around the front of the car. Like the transfer box of Jeep, it is much more difficult and the cost will inevitably rise. If you want to cross the engine, you need a compact design. Without computer-aided design, this compact engine is difficult to design and arrange. With the development of science and technology, computer-aided design makes compact layout easy, and the manufacturing level has also improved. The engine can be trouble-free for a long time, and the new car will not be repaired for several years, so the durability is guaranteed. This is the possibility of the predecessor. So the ex became popular.