What are the advantages and disadvantages of front and rear drive?

c Front-engine, front-wheel drive (FF): It is a form of arrangement that has gradually become popular in domestic and foreign cars in the 90s of the 20th century. In order to shorten the length of the vehicle and reduce the weight of the car, the engine is often placed in front of the front axle, and the things behind the transmission are moved forward, and the transmission and the drive axle are integrated and fixed next to the engine, and the power is directly transmitted to the front wheels, reducing the height of the chassis and improving the handling stability at high speeds.

For example, the common Audi 100 car, as well as the mini car (Xiali, Alto, etc.) all adopt the engine front, front-wheel drive drive train layout, the common engine front, front axle drive car also has two kinds of structure: one is the engine axis parallel to the front axle transverse type (such as Xiali car); The second is the longitudinal engine type (such as Santana, Audi and other cars).

D Rear-engined, rear-wheel drive (RR): It seems to be a copy of the FF car, but the "internal organs" in the front of the car are moved to the rear. This kind of vehicle maintains the advantages of FF car, also eliminates the shortcomings of FF car, because the interior layout tends to be reasonable, and the noise and temperature in the car are improved, with its unique structure and good performance by the user's welcome.

2. The engine is front-wheel drive.

Advantages of the structure: a engine front and front-wheel drive, so that the front axle axle load increases, the car has obvious understeering performance, improve the excellent high-speed driving maneuverability and stability, the front axle load is increased by nearly 60, with an obvious understeer trend. In addition, because the front wheels have driving force, the lateral deviation stiffness of the front wheels is reduced, which increases the tendency of the car to understeer, thus ensuring the safety of high-speed driving.

b The engine is front-mounted, the transverse engine transmission line of the front-wheel drive is short, and the size of the engine front compartment is compact, which can improve the utilization rate of the space in the car; Its crankshaft is parallel to the front drive shaft of the car, which eliminates the spiral bevel gear transmission (the main transmission gear of the main transmission can adopt cylindrical gear), reduces the transmission noise, simplifies the process, reduces the parts, and reduces the cost; The high transmission efficiency, coupled with the small mass of the whole vehicle, makes the car have good fuel economy.

c The clutch, transmission, driving wheel, etc. of front-mounted and front-wheel drive transmission devices are arranged in the front of the car, so that the front of the car is relatively shortened, because the transmission shaft that runs through the front and rear is canceled, the chassis height is reduced, the vibration is reduced, and the convex transmission shaft channel is not necessary to be arranged on the floor, and it maximizes the internal volume of the compartment; The floor of the trunk is lowered to increase the space of the trunk, and the height of the body floor is lowered to make the floor flat, the interior is spacious, and the rear seat position is quieter and more comfortable, which helps to improve the comfort of passengers.

d Because the rear axle is fixed, the unsprung mass is reduced, and the stability is improved, so the rear seat is more stable and comfortable, and the wear of the tire is also reduced; If the drum brake is adopted, the front wheel does not have to be equipped with the brake drum, and the braking effect of the front wheel can be obtained by installing the brake drum on the transmission shaft, which reduces the non-sprung mass on the front wheel and improves the driving smoothness of the car.

The front-wheel drive structure is simple, does not need a long rotating shaft to occupy both the interior space and the vehicle weight, this layout is biased towards the head and tail light, is less stable when walking, and the front tire wear will come quickly, because the center of gravity, braking, steering, and driving work all fall on the front wheel.

The rear-wheel drive layout is easier to achieve the average weight of the head and tail, the front and rear tire wear will be more even, and the walking is more stable, but the disadvantage is that the structure of the front-wheel drive car is simple.

What are the advantages and disadvantages of front-wheel drive and rear-wheel drive? If you don't understand, come in and take a look.

The advantages and disadvantages of front drive and rear drive are as follows: The advantages of the precursor are: the power system is compact, the transmission shaft is short, and the power output loss is small.

In terms of handling, front-wheel drive is inherently understeered and easy to drive. In terms of layout, there is no propeller shaft through the body, which can reduce the bulge in the middle of the body and increase the empty space of the car. Disadvantages of the precursor:

When starting, the load on the front axle is reduced, resulting in a decrease in tire adhesion and affecting power delivery. Coupled with the fact that the front wheels are responsible for driving, turning the sail and most of the braking power, the wear is severe. Advantages of rear drive:

Rear-wheel drive is common in supercars. The advantage of the sock car is that the front and rear weight ratio of the vehicle is close to perfect, taking into account the advantages of the front and rear drives, but there is no transmission loss like the front and rear drives. Disadvantages of rear drive:

Rear-wheel drive cars often leave large bumps on the floor inside the car because the power wheels are in the back. Affect rides. Quick cornering makes it easier to drift.

It is also easy to oversteer. In addition, rear-wheel drive does not grip as well as front-wheel drive on ice and snow roads, and cannot go uphill.

The advantages and disadvantages of front-wheel drive and rear-wheel drive are as follows: 1. The advantages of front-wheel drive are: compact power system, short drive shaft, low power output loss.

In terms of handling, front-wheel drive cars are inherently understeer and easy to drive. In terms of layout, there is no propeller shaft passing through the compartment, which can reduce the bulge in the middle of the body and increase the usable space of the compartment. 2. Disadvantages of the precursor:

At the start, the load on the front axle is reduced, resulting in reduced tire adhesion and affecting power delivery. In addition, the front wheels are responsible for the drive, steering and most of the braking power, so the wear is severe. 3. Advantages of rear drive:

Rear-wheel drive is generally found in supercars. The advantage is that the front-to-rear weight ratio of the vehicle is close to perfect, and it takes into account the advantages of front-rear-wheel drive vehicles, but there will be no transmission loss like front-rear drive vehicles. 4. Disadvantages of rear drive:

Rear-wheel drive vehicles often leave large bumps on the floor of the car because of the power wheels in the rear. Affect the ride. Quick cornering makes it easier to drift.

It is also easy to oversteer. In addition, on ice and snow roads, the grip ability of the rear drive car is not as good as that of the front drive, and it is impossible to climb uphill.

1. The front-wheel drive car is more suitable for home use, in terms of layout, there is no transmission shaft through the compartment, which can reduce the bulge in the middle of the body and increase the available space of the carriage. In addition, the transmission efficiency is high, the engine is very close to the gearbox, the drive shaft is short, the power output loss is low, and the transmission effect is direct. In the past, transverse engines were the most efficient, which is also the arrangement used by most front-wheel drive vehicles.

It has understeer characteristics and is easy to drive.

The disadvantage is that when starting, the load on the front axle is reduced, resulting in reduced tire adhesion and affecting power output. In addition, the front wheels are responsible for the drive, steering and most of the braking power, so the wear is severe. In addition, the engine compartment has to accommodate the engine and gearbox, which limits the space of the steering system.

The turning angle is not as large as that of the rear wheel drive.

2. Compared with the front-wheel drive car, the rear-wheel drive car can provide greater effective traction, and the steering angle of the rear-drive car is much larger than that of the front-wheel drive car.

The main disadvantage is that the power loss and fuel consumption of the rear drive will be more, and the rear drive car often leaves a large bulge on the floor of the car because the power wheel is in the rear. Affect the ride. Quick cornering makes it easier to drift.

It is also easy to oversteer. In addition, on ice and snow roads, the grip ability of the rear drive car is not as good as that of the front drive, and it is impossible to climb uphill.

1. The advantages of rear-wheel drive are speed, handling, and driving pleasure. Rear-wheel drive cars are the fastest, and most high-performance supercars are rear-wheel drive. Rear-wheel drive vehicles are also more fun to drive than four-wheel drive and front-wheel drive vehicles.

And the rear-wheel drive car can also drift, which is not possible with both front-wheel drive and four-wheel drive.

2. There are many kinds of rear-wheel drive vehicles, such as front-rear-wheel drive, mid-rear-wheel drive, and rear-wheel drive.

3. Front and rear wheel drive is a way used by many luxury cars, such as BMW 3 Series, Mercedes-Benz C-Class, Mercedes-Benz S, Cadillac CT5, etc.

4. Mid-mounted rear-wheel drive is used by many supercars, such as Lamborghini, Ferrari, McLaren, etc.

5. There is only one brand of car in use for rear rear-wheel drive, which is Porsche 911.

6. Porstime's 911 is famous for its rear engine.

7. The rear wheels of the rear-wheel drive car are only responsible for driving the car forward, and the front wheels are only responsible for steering, so that there is no interference between the front wheels and the rear wheels.

8. Rear drive is a more reasonable driving method.

9. The flexibility of the rear-wheel drive car is incomparable to that of the four-wheel drive, and the speed of the rear-drive car is incomparable to the front-wheel drive car.

10. Of course, rear-drive also has shortcomings, rear-drive cars are very easy to flick their tails, especially high-horsepower rear-drive cars.

11. Therefore, the technical requirements for the driver to control the rear-wheel drive car are relatively high.

12. This is also one of the reasons why rear-wheel drive cars are more fun to drive, because driving rear-wheel drive cars is more provocative.

The advantages of front-wheel drive are high transmission efficiency, simple transmission system structure, and front-wheel drive cost. In addition, the space of a front-wheel drive car is advantageous compared to that of a rear-wheel drive car. The powertrain and drivetrain of a front-wheel drive car do not encroach too much on the cockpit space.

Most family cars are front-wheel drive, and front-wheel drive car engines are also front-mounted.

Most front-wheel drive cars have transverse engines, but there are also longitudinal front-wheel drive cars.

The transverse engine transmission is also transverse, so that the powertrain does not encroach on the cockpit space.

And the transverse gearbox directly extends out of the two half-shafts to connect the wheels, which simplifies the structure of the transmission system.

Most transverse front-wheel drive vehicles have the main pickpocket, reducer and differential integrated into the gearbox housing.

But the front wheel drive itself is an unreasonable driving method, the front wheel of the front wheel drive car is responsible for driving the car forward, but also responsible for turning the spring dislike, so the handling of the front wheel drive car is not as good as the rear drive car.

Front-wheel drive vehicles will push their heads when cornering quickly, and pushing their heads is understeer.

Front-wheel drive vehicles are also unable to withstand large horsepower, because the grip of the front wheels is limited, and the application of more horsepower to the front wheels will cause serious slippage of the front wheels.

Rear-wheel drive is a more reasonable way to drive, the rear wheels of the rear-wheel drive car are responsible for driving the car forward, the front wheels are responsible for steering, and the front wheels and rear wheels do not interfere with each other.

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