The vehicle power transmission mode can be divided into four types: "engine front, rear axle drive", "engine front, front axle drive", "engine rear, rear axle drive" and "four-wheel drive". But in general, it can be said that there are two types of engine front and rear engine. What is the difference between the front engine and the rear engine?
For the front engine model, the powertrain system must have a rotating shaft that passes from the front part of the vehicle body to the rear of the whole body to transmit power to the drive axle. The transmission efficiency is low, and there is also a space for the interior of the vehicle. Affected.
The front engine means that the engine is mounted on the front of the front axle of the car. The advantage of this can be said to simplify the transmission system, save a long drive shaft, simple structure, not only can reduce power loss, but also can greatly reduce the failure rate.
The "engine front" method is generally used in medium and high-class cars. The advantage is that the load carried by the front and rear axles is basically the same, the power is strong, and the traction is large. When driving on the muddy road and the bumpy road, the power, anti-rear wheel slip and stability are obviously superior to the “engine front, The front axle drives the car. The disadvantage is that the drive shaft retreats to the rear axle, causing the floor to bulge, and several total components are arranged to occupy a large space, making it difficult to miniaturize the car.
Rear engines are more common in high-powered cars because the front end is of lower quality and may have insufficient turning. Another form is the mid-engine. Because the car's center of gravity falls in the middle of the car, the stability is best. However, this form will affect the space and layout of the car, which is rarely used in ordinary cars, and only high-performance models will use this structure.
The advantage of "engine rear" is that the drive shaft is omitted, the adhesion is large, the traction is large, the wheelbase can be small, there is no exhaust pipe under the floor, and the engine exhaust and noise do not pollute the cabin.
However, its shortcomings are that the rear axle has a large load, the turning is easy to skid, the operating system is too long, the structure is complicated, the cooling system is complicated, the trunk is too small, and it is only suitable for the minicar. This shows that the front and rear engines are very different.
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