What does FF and FR mean in a car?

The drivetrain arrangement of a car can be divided into five categories: engine front-wheel drive (FR), engine front-wheel drive (FF), engine mid-rear-wheel drive (MR), engine rear-wheel drive (RR), and four-wheel drive (4WD).

Front rear wheel drive (FR).

In the early days, most of the cars were in the FR layout, but now they are mainly used in mid- and high-end cars. The advantages of FR are: the axle load is evenly distributed, that is, the front and rear weight of the vehicle is relatively balanced, and the handling stability is better.

The disadvantages are: there are many transmission parts, the mass of the transmission system is large, and the transmission shaft that runs through the cabin occupies the platform space in the cabin.

Precursor (FF).

FF is a common layout scheme used in modern small and medium-sized cars. The advantages of the FF are: the floor of the cabin is lowered, the handling has obvious understeer characteristics, and its anti-skidding ability is also stronger than that of the FR.

The disadvantages are: the adhesion of the drive wheels will decrease when going uphill;The front wheels are driven and steered, resulting in complex structures and poor working conditions.

Mid-mounted rear-wheel drive (MR).

The engine is placed between the front and rear axles and is rear-wheel driven, similar to the arrangement of a Formula 1 car. There is also a "front mid-engine", in which the engine is placed behind the front axle and before the occupants, similar to the FR, but with the same ideal axle load distribution as the MR, resulting in improved handling. The advantages of MR are:

The axle load is evenly distributed and has very neutral handling characteristics. The disadvantage is that the engine takes up space in the cabin, reducing space utilization and practicality, so MR is mostly a sports car that pursues handling performance.

Rear-wheel drive (RR).

In the early days, it was widely used in mini cars, and now it is mostly used in buses, and it is rarely used in cars, but the "tail flicking" of the Porsche 911 is famous because of the RR. The advantages of the RR are: compact structure, no heavy propeller shaft, and no complicated front-wheel steering and drive structure.

The disadvantage is that the rear axle load is larger, which creates a tendency to oversteer in terms of handling in contrast to FF.

Four-wheel drive (4WD).

Regardless of the above layout, four-wheel drive can be used, which was most used in off-road vehicles in the past, but with the development and application of limited-slip differential technology, four-wheel drive systems have been able to accurately allocate torque between wheels, so high-performance sports cars are increasingly using four-wheel drive for improved handling. The advantages of 4WD are: all four wheels are powered, the ground adhesion rate is the largest, and the passability and power are good.

Four-wheel drive (4WD) is also divided into full-time four-wheel drive (like Audi) and time-sharing four-wheel drive.

fr is'frontengine,reardrive'The abbreviation is one of the most basic information used to describe the mechanical structure layout of a car. It means "front-engine, rear-wheel drive", which is the so-called "front-rear-wheel drive".

As the name suggests, the engine is placed at the front of the car, and power is transmitted to the rear wheels through a propeller shaft, which then transfers the power to the ground through the rear wheels. The front wheels of the car are not powered and are only used for steering. It can be regarded as one of the older ones in the existing car layout, and is mostly used for large cars or sports cars.

1. Good handling because some components are moved from the front to the rear, and the weight distribution between the front and rear is easy to approach 50:50, which greatly improves the balance and handling of the car. That's why most sports cars have rear-wheel drive.

2. The arrangement of easy maintenance of front and rear drive also makes the assembly, such as engine, clutch and transmission close to the cab, simplifies the layout of the control mechanism and the structure of the steering mechanism, and makes it more convenient for the maintenance and repair of the vehicle.

3. Compared with other two-wheel drive driving, when the front rear drive starts, accelerates or climbs on a good road surface, the adhesion pressure of the drive wheel is large, and the traction is significantly better than that of the front wheel drive form. At the same time, the models with front and rear wheel drive also have good handling stability and driving smoothness, which is conducive to prolonging the service life of tires.

It means "front-engine, rear-wheel drive", which is the so-called "front-rear-wheel drive".

The full name is Front Engine, Rear Drive. The engine of the car is placed on the front of the car, and the power is transmitted to the rear wheels through a propeller shaft, and then the power is transferred to the ground through the rear wheels. The front wheels of the car are not powered and are only used for steering.

Rear-wheel drive cars, despite their nimble handling and high torque, have the characteristics of oversteer, which require precise throttle and direction control. There are many rear-wheel drive parts, and the assembly is complicated, and at the same time, the interior space is reduced. However, with the adoption of the independent suspension system for the rear wheels, there is a lot of room for improvement in the space of the rear-wheel drive car.

What he means is that the engine is front-mounted rear-wheel drive (FR).

Engine: front-mounted, rear-wheel drive is one of the most traditional types of drive. Most trucks, some cars and some buses at home and abroad use this type of drive, but there are very few small cars with this type.

For the bus, when carrying out the front rear axle drive, the most prominent feature is that the operation is simple, because the control mechanism caused by the motor car is relatively easy, so the operation control structure is also relatively easy, when the radiator of the bus is in the front, this practice is the cooling effect is better.

When the weather is relatively cold in winter, in the process of operation, you can add a layer of quilt in front of the radiator cover, the advantage of this is that you can protect the various parts of the engine, so that it can protect the engine and keep it at a certain temperature, because as the core of the car, the engine is one of the problems that many drivers and friends are not easy to find.

Antibody FR is the backbone region, and about 110 amino acid sequences at the proximal N end of the H and L chains of immunoglobulins vary greatly, and the amino acid sequences of other parts are relatively constant, so that the light chain and heavy chain can be distinguished into variable (V) and constant (C). VH and VL. There are three regions of amino acid composition and arrangement order are highly varied, which is called the hypervariable region (HVR) or complementary deterministic region (CDR), which is relatively difficult to change in the composition and arrangement order of amino acids in CDRL, CDR2 and other regions, respectively, and is called the skeleton region (FR).

VH and VL, with 113 and 107 amino acid residues, respectively, composed of 4 FRs (FRL, FR2, FR3, and FR4, respectively) and 3 CDRs (CDR1, CDR2, CDR3).

FR literal engine front-rear-wheel drive, Volkswagen currently only Bluesport is a rear-wheel drive car, only started sales in 2013, there is no domestic sales at present, can only be fully imported. FR cars refer to front-engine rear-wheel drive, also known as front-engine rear-wheel drive, and this type of car is very common on the road, such as the BMW 5 Series.

BMW 7 Series, BMW 3 Series.

BMW 1 Series import version, Cadillac ATSL, Cadillac CT5, Cadillac CT6, Mercedes-Benz C

and so on are front-engined rear-wheel drive cars.

FF stands for Front Engine Front Drive, front engine, front-wheel drive, the engine is placed in the front of the car, the gearbox is close to the engine, and the power is sent to the ground from the front wheels. FF, RR, FR refers to the engine of the car and its drive type FR: front-engine, rear-wheel drive, FF:

Front-enginefront-wheel driveMR: mid-engineRear-wheel driveRR: Rear-engineRear-wheel drive4WD:

Four-wheel drive. > FR stands for front-wheel drive. That is, the engine is front-mounted and rear-wheel drive. The most representative of the sedan is BMW. In addition to the X series. It's basically fr. When it comes to sports cars, the most representative is the Ferrari.

Finish. Needless to say, that's not to say. BMW, Ferrari series models in a bunch of piles. One more car to mention, Toyota Reiz.

It can be said that it is the cheapest rear-wheel drive car in China, FR front-rear-wheel drive; FF front-wheel drive is a common arrangement of the automobile transmission system, which is mainly related to the position of the engine and the drive form of the car. <>

The full name of front-rear-wheel drive is called engine front-rear-wheel drive, which is a more traditional form of drive. The front wheels are responsible for steering, and the rear wheels are responsible for driving the entire vehicle. In this form of drive, all the power output from the engine is sent to the rear drive axle, which drives the rear wheels to move the car forward.

The full name of front-wheel drive is engine front-wheel drive, front-wheel drive is a common layout scheme for modern small and medium-sized cars, such as Volkswagen's Jetta and Santana.

and Passat sedans are often arranged in this way.

FR stands for front-engine rear-wheel drive models, referred to as front-rear-wheel drive, which is a more traditional form of drive, in which the front wheels are responsible for steering, and the rear wheels are responsible for the driving work of the entire vehicle.

FR is the abbreviation of Front Engine, Rear Drive, and is one of the most basic materials used to describe the mechanical structure layout of a car. It means front-engine, rear-wheel drive , which is the so-called front-side rear-wheel drive

It stands for the meaning of a performance car. Performance cars are different from other cars in that they have excellent power and handling.

FR is engine front-mounted rear-wheel drive. FF is engine front-wheel drive.

Front-engine (rear-drive, referred to as FR) is the most traditional form of drive.

Engine front-wheel drive, that is, engine front-engine, front-wheel drive (FF). This is the most popular drive type for cars (including micro and economy cars), but trucks and buses basically do not use this type.

FR (front-engine, rear-wheel drive). FF (front-engine, front-wheel drive). MR (mid-engine, rear-wheel drive). RR (rear-engine, rear-wheel drive).

Although there are many types of vehicles, the structure is similar. This should be said to be the credit of standardization, but also the need for large-scale production lines. With the development of society, the progress of science and technology and the change of demand, the shape of railway vehicles has begun to change, especially the passenger car is no longer the same old face.

However, their basic structure has not changed significantly, but the specific parts have a more scientific and advanced structural design.

Generally speaking, the basic structure of the vehicle is composed of five parts: the car body, the undercarriage, the running part, the coupler buffer device and the braking device.

The body is the part of the vehicle that is used to load goods or passengers, and is the basis for the installation and connection of other components of the vehicle. The body of the early vehicles was mainly made of wood, supplemented by steel plates, bow rods, etc. In modern times, the car body is mainly steel structure or light metal structure.

This means that it is equipped with a front-engine. It is a rear-wheel drive method. The characteristics are that the layout is different, the vehicle has more power, and the safety is relatively high, the stability of the vehicle is also better, and it is very smooth in the driving process, and it will not be prone to frustration.

In the automotive sector, FR stands for front and rear drive. Front-wheel drive is the front and rear wheel drive of the engine; Higher configurations, better performance, faster boot times, more convenient to use, and easier to use.

1. FR stands for Front Engine Rear Drive, front engine, rear-wheel drive, mostly used in large cars or sports cars. Common FR models include Mercedes-Benz C-Class, E-Class, S-Class, BMW, Toyota Crown, etc.

2. FF full name front engine front drive, front engine, front-wheel drive, the engine is placed in the front of the car, the gearbox is close to the engine, and the power is sent to the ground from the front wheels. The front wheels have both negative power transfer and steering functions. The advantage is that the propeller shaft to the rear wheels is omitted, the cabin has more space, and the body is naturally light.

FF stands for Engine Front Front Wheel Drive FR is Engine Front Rear Wheel Drive RR is Engine Rear Rear Wheel Drive.

1. FF is to save the drive shaft to the rear wheels, the cabin has more space, and the body is lighter.

2. The engine of the fr car is placed at the front of the car, and the power is transmitted to the tail wheel through a transmission shaft, and then the power is transferred to the ground through the tail wheel. The front wheels of the car are not powered and are only used for turning the source in the opposite direction. It can be considered one of the older ones in the existing car layout.

3. Although FF is generally not as flexible as FR, it is easy to control and easier to rescue when it is out of control at high speed, so it is also generally popular in flying circles.

4. FF is front-wheel drive, FR is front-wheel drive.