Front wheel drive and rear wheel drive vehicles Structural features?

1. Omit the transmission shaft device, reduce the weight of the vehicle, and the structure is relatively compact;

2. The space of the engine compartment is effectively utilized, and the space in the cab is relatively spacious, and is conducive to reducing the floor height and improving the riding comfort;

3. The engine is close to the driving wheels, with high power transmission efficiency and good fuel economy;

4. The engine and other assemblies are front-mounted to increase the load on the front axle, and improve the handling stability of the car at high speed and the directional stability during braking;

5 Simplified rear suspension system.

1. The engine is placed in front and the rear wheels are responsible for driving.

moving, the body counterweight is easy to balance.

2. The engine is generally placed vertically and can be placed.

Larger. 3. A transmission shaft has been added to make the car inside.

The floor is raised in the middle and increases at the same time.

The weight of the vehicle also increases the power. Loss.

The front-rear-wheel drive structure is characterized by an additional conveyor shaft in the middle. Then lead to the middle seat of the rear seat, where there is a large bulge under the soles of the feet, which is not suitable for being human.

The layout of the car is the layout of the power train of the car, which has an important impact on the performance, shape and internal dimensions, weight, axle load distribution, manufacturing cost and maintenance of the whole vehicle. Scientific and reasonable selection of drive type is one of the primary tasks of the overall design of automobiles. Most trucks (including pickup trucks), some cars (especially high-end cars) and some buses at home and abroad use this type of drive, but there are very few small cars with this type.

The vehicle using the front-rear-wheel drive type has the following advantages: 1. When starting, accelerating or climbing on a well-assembled road surface, the load of the driving wheel increases (that is, the adhesion pressure of the driving wheel increases), and its traction performance is superior to that of the front-wheel drive type; 2. The axle load distribution is relatively uniform, so it has good handling stability and driving smoothness, and is conducive to prolonging the service life of the tire; 3. The engine, clutch and transmission assemblies are adjacent to the cab, simplifying the arrangement of the control mechanism; 4. The steering wheel is the driven wheel, and the steering mechanism is simple in structure and easy to maintain.

1. The transmission shaft device is omitted, which reduces the weight of the DU car, and the structure is relatively compact; 2. The space of the engine room is effectively utilized, and the space in the cab is relatively spacious, which is conducive to reducing the floor height and improving the ride comfort; 3. The engine is close to the driving wheels, with high power transmission efficiency and good fuel economy; 4. The engine and other assemblies are front-mounted to increase the load on the front axle, and improve the handling stability of the car at high speed and the directional stability during braking; 5 Simplified rear suspension system. 6. When driving on snow or slippery roads, pull the body by the front wheel, which is conducive to ensuring the stability of the direction; 7. The car radiator is arranged in the front of the car, and the heat dissipation conditions are good, and the engine can be cooled sufficiently; 8 The luggage compartment is arranged in the rear of the car, so there is enough luggage space.

Front-wheel drive and rear-wheel drive vehicles Structural features? Such a car structure should be very durable, right? What are your characteristics? Just look it up on the Internet.

First, the precursor:

1. Advantages: omit the transmission shaft.

device, reduce the weight of the vehicle, the structure is relatively compact; The engine is close to the drive wheels, with high power transmission efficiency and good fuel economy.

2. Disadvantages: When starting, accelerating or climbing, the load on the front wheels is reduced, resulting in traction.

Decline; Front-wheel drive and steering require constant velocity joints, and their mechanisms and manufacturing processes are complex.

Second, the front and rear drive:

1. Advantages: engine, clutch and transmission.

The assembly is close to the cab, simplifying the arrangement of the control mechanism; The steering wheel is the driven wheel, and the steering mechanism is simple in structure and easy to maintain.

2. Disadvantages: due to the use of transmission shaft device, it not only increases the weight of the vehicle, but also affects the comfort of riding; At the same time, the transmission efficiency of the power train is reduced, which affects fuel economy and power.

3. Rear precursor:

1. Advantages: In the early days, some people believed that through better design, the rear front-wheel drive car could have better collision performance.

2. Disadvantages: Because it causes the center of gravity of the vehicle to be too far back, and the front wheel load used as the drive is low, it is not conducive to acceleration, and climbing is also more disadvantageous.

Fourth, the rear rear drive:

1. Advantages: Due to the small yaw torque, the vehicle is very flexible to operate; Due to the low load on the front wheels, the steering is light.

2. Disadvantages: large crosswind sensitivity; Due to the short pipeline, the design of the exhaust device is difficult.

Advantages of front-wheel drive: First of all, front-wheel drive can reduce the production cost of cars. In addition, the biggest advantage of the front-wheel drive model is that it can have more rear seat space.

Disadvantages of front drive: from the aspect of vehicle handling and safety, the center of the engine and drive shaft of the front wheel drive car is in the front of the vehicle, and the drive wheel is also in the two front wheels, so the center of gravity of the front part is forward due to inertia when cornering, if the angle is too large or the speed is too fast, it is easy to break through the ground adhesion of the front wheel, and understeer occurs, which is commonly known as the "push head" phenomenon, so the front wheel drive model has poor handling evaluation, which is also one of the biggest disadvantages of the front wheel drive car. Rear-wheel drive advantages:

The rear-wheel drive car is more average than the front-wheel drive car in the distribution of the center of gravity of the vehicle, and can generally reach the optimal ratio of 50 50, so that the sports performance of the driving is higher, and the limit value of cornering is higher, and most sports cars use this driving mode. In addition to good handling, low maintenance costs are also an advantage of rear-wheel drive.

Disadvantages of rear drive: when turning, the front wheel of the car has changed the direction of driving because it is directly dominated by the steering system, and the driving wheel behind still has the inertia to move forward, so it is easy to oversteer, commonly known as "tail flicking". Because the power generated by the engine needs to pass through the propeller shaft before it can be transmitted to the rear drive wheel, the loss of power is bound to be greater than that of the front-wheel drive vehicle, which makes the fuel cost also slightly increased due to the increase in the power loss of the rear-wheel drive model.

Relatively high assembly and manufacturing costs, more breakdowns, relatively small interior space, etc. Advantages of rear-wheel drive: Four-wheel drive is a more balanced drive mode, which concentrates the advantages of front-wheel drive and rear-wheel drive, and can effectively avoid understeer and oversteer.

Rear-wheel drive disadvantages: Since the engine torque is distributed to the front and rear wheels, some power is sacrificed, which is more fuel-efficient. A 4WD is much more expensive than a 2WD car, and a 4WD must have three differentials, one of which is placed between the front and rear propeller shafts, while the other two are placed between the front and rear half axles.

Of course, if you are a driving enthusiast, you can choose a model that suits your driving habits according to the knowledge introduced in this article.

Summary. Hello, the power system of the front wheel drive is compact, the gearbox and differential are integrated together, the transmission shaft design is canceled, the transmission efficiency is high, and the car is more fuel-efficient. For front-mounted and rear-wheel drive cars, the engine is only used in a longitudinal layout, which has high requirements for engine compartment space, the gearbox and differential are separated, and there is a transmission shaft in the middle, so the power loss is relatively large, and the transmission shaft is prone to resonance and other failures.

Hello, happy to answer your questions.

Hello, the power system of the front wheel drive is compact, the gearbox and the differential are integrated together, the transmission shaft design is canceled, the transmission efficiency is high, and the car is more fuel-efficient. For front-mounted and rear-wheel drive cars, the engine is only in a longitudinal layout, and the requirements for the pure cabin space of the engine cover are relatively high, the gearbox and differential are separated, and there is a transmission shaft in the middle, so the power loss is relatively large, and the transmission shaft is prone to resonance and other failures.

Front rear wheel drive is a common term for the form of automobile drive, & ls quo; Front-engine (rear-drive, FR) is the most traditional form of drive.

The use of front and rear drive as a bird drive pure early action type of the vehicle has the following advantages:

First, when starting, accelerating or climbing on the well-assembled road surface, the load of the driving wheel increases (i.e., the adhesion pressure of the driving wheel increases), and its traction performance is superior to that of the front-wheel drive type;

Second, the axle load distribution is relatively uniform, so it has good handling stability and driving smoothness, and is conducive to prolonging the service life of the tire;

Third, the engine, clutch and transmission and other assemblies are close to the cab, simplifying the arrangement of the control mechanism;

Fourth, the steering wheel is the driven wheel, and the steering mechanism is simple in structure and easy to maintain.

Photo by Dong Peng) @2019

First of all, the front wheel drive does not need to transmit power to the rear wheels through a long drive shaft like the rear wheel drive, so its energy transmission efficiency is much higher than that of the rear wheel drive car. The full play of power performance and the improvement of fuel economy are self-evident.

Front-wheel drive vehicles are the most susceptible to understeer. On the other hand, the reason is that the front wheels should provide both traction and the necessary lateral force when steering, resulting in excessive load and easy to skid, and the front wheel slippage will lose a lot of lateral force, which will also largely lead to the vehicle can not move according to the established trajectory but extend the tangential direction of the steering circumference.

However, this is a phenomenon that only occurs under special circumstances. And with today's advances in suspension and tyre technology, the steering limits of front-wheel drive cars are getting higher and higher, and these situations are almost impossible to encounter in everyday driving. One of the great advantages of the front-wheel drive is that in the case of slippery roads in rainy and snowy weather, the front-wheel traction body can easily ensure the stability of the direction, so that the vehicle will not lose control due to the slippage of the socks and the moving wheels.

The transmission and differential are integrated into one, and there is no propeller shaft, which greatly reduces the mass of the body.

Because the source of noise and vibration is mostly in the front of the body, the noise and vibration of the total noise body of the car are reduced.

The load on the front suspension and front wheels increased.

The inner seepage beam part of the body has a large space for search and transportation.

Summary. Rear-mounted front-wheel drive models are: BMW 3 Series, BMW 5 Series, BMW 7 Series, BMW X1, BMW X3, BMW X5, BMW X6, BMW Z4, BMW i3, BMW i8, Mercedes-Benz C-Class, Mercedes-Benz E-Class, Mercedes-Benz GLK-class, Mercedes-Benz GLC-class, Mercedes-Benz GLS-class, Mercedes-Benz S-class, Audi A3, Audi A4, Audi A5, Audi A6, Audi A7, Audi A8, Audi Q3, Audi Q5, Audi Q7, Jaguar XE, Jaguar XF, Jaguar F-Pace, Jaguar XJ, Range Rover, Land Rover Discovery, Land Rover Evoque, etc.

What kind of car is there for the rear front drive.

Rear-mounted front-wheel drive models are: BMW 3 Series, BMW 5 Series, BMW 7 Series, BMW X1, BMW X3, BMW X5, BMW X6, BMW Z4, BMW i3, BMW i8, Mercedes-Benz C-Class, Mercedes-Benz E-Class, Mercedes-Benz GLK-class, Mercedes-Benz GLC-class, Mercedes-Benz GLS-class, Mercedes-Benz S-class, Audi A3, Audi A4, Audi A5, Audi A6, Audi A7, Audi A8, Audi Q3, Audi Q5, Audi Q7, Jaguar XE, Jaguar XF, Jaguar F-Pace, Jaguar XJ, Range Rover, Land Rover Discovery, Land Rover Evoque, etc.

Can you tell us more about that?

A rear-mounted front-wheel drive vehicle is a special type of vehicle that features the engine at the rear of the body, while the driving force is transmitted to the wheels by the front wheels to move forward. The advantage of this type of vehicle is that the engine is located at the rear of the body, which can better improve the center of gravity of the vehicle, improve the handling performance of the vehicle, and reduce the difficulty of handling. In addition, since the engine is located at the rear of the body, the vehicle's headroom can be better improved, resulting in increased ride comfort.

At present, the main application of rear-mounted front-wheel drive cars is sports cars, such as Ferrari, Porsche, etc.