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Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

Blog 2年前 (2022-01-16) 320 Views

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

I don't know if you still remember a previous issue of "The Car Affair", a little brother drove Poussin and two girls up the stairs, and they were almost on the top of the glory, and the car was scrapped directly; and in the same issue another In order to test the performance of the four-wheel drive, the little brother also contributed to the feat of climbing stairs in the park.

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

Just as a friend recently talked about the tire noise problem of the Wrangler, I remembered these suffocating car destruction operations - there is a very essential difference between an urban SUV and a hardcore off-road vehicle, just like a friend complaining about buying it for nearly 500,000 Wranglers don't have a CR-V for comfort. Driving a four-wheel drive to go off-road is a rhythm that can't be returned.

So what hardware does hardcore off-road have that city SUVs don't have?

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

Off-road professional tires with the care of construction boots

First of all, the tires are completely different, which is as cruel as going to the construction site in your slippers to move bricks. Urban road vehicles are basically all tires with fine lines and overall smoothness, focusing on quietness, comfort and handling; while in order to reduce slippage in mud and snow, off-road tires have prominent lines and deep grooves. , the overall texture is also hard, which is also the reason for the serious tire noise of my friend's Wrangler.

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

So many urban SUV performances have stairs to climb? It is a special car for test driving. Let alone climbing stairs, we must consider the angle and speed of the road shoulder to minimize the damage to the tires. Of course, if you have money, it is another matter.

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

Carrying body to play off-road, Transformers in minutes

Most urban SUVs use a load-bearing body, and the body and chassis are integrated, providing high comfort, smooth driving and less vibration and noise. However, since the entire body will be stressed, when some exaggerated movements are made, the slight deformation of the body cannot be removed, and in severe cases, the door will not be closed tightly, or the vibration will become larger; in addition, everyone does not buy a car. The pursuit of a long wheelbase, but in off-road, the longer the wheelbase is, the easier it is to cause deformation, and it will also affect the passability.

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

Twisting twists like the picture above is commonplace for mountain and off-road. Therefore, a non-load-bearing body with a girder underneath is the first choice for off-road vehicles. After all, it is much better for the girder to bear all the forces than the frame and car skin. In addition, this structure will be much more resistant to bumps.

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

A lot of four-wheel drive talk about it, that lock is the key

Simple science: When the car turns, the speed of the inner and outer wheels is different, so a differential is needed in the middle; in the same way, since the moving speeds of the four wheels are different, there is also a central differential between the front axle and the rear axle. , This is the basic gameplay of many full-time four-wheel drive nowadays.

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

But once one wheel slips, doesn't the other stop completely? Yes, so the differential has to be forced to lock occasionally, this is the differential lock. Around the differential lock, you will understand that it is also four-wheel drive, why the level of getting out of trouble is so different. The first thing that needs to be black is the standard four-wheel drive, but the 07 Highlander without the central differential lock. Once this car has wheels slipping on the steep slope, it will directly GG. After all, the three wheels are stationary without the central differential lock. , no one can save it...

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

But don't all mainstream urban SUVs use timely four-wheel drive?Yes, the forced deployment of the power of other wheels by the central differential lock at the right time is the magic weapon for SUVs to get out of trouble, but because most designs have only10-30% power energyIt is assigned to other wheels, so it’s okay to go through a mud pit or sink into snow. However, on a steep slope or when 2-3 wheels are slipping, it is estimated that it is only necessary to get down and push the cart. For example, the CX-4 in the picture below:

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

Of course, there are many urban SUVs that also use the 50:50 central differential lock power distribution as a selling point, such as appliances, Outlander, Prado, etc., all of which have mild off-road fun, but pay attention, even this kind of tough guy faction They are all just mild off-road. After all, the positioning is always in urban driving. Of course, if it is modified, it will be another matter.

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

Off-road vehicles will never use zero acceleration to force

Learn about the legend of BYD Tang's 542? Breaking 100 in 5 seconds, 4WD, 2L oil/100km - it is also a 4WD SUV, but the hardcore off-road is really not interested in breaking 100 in a few seconds, because off-road focuses on low-speed and high-torque, after all, torque is needed when getting out of trouble There is no inertia to drive the whole vehicle, and some awesome off-road vehicles can even climb hills at idle speed, which is the reason.

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

This is also why some cars are stuck in the quagmire, and there are always only off-road vehicle trailers, but I have never seen a high-horsepower supercar towed. Of course, due to the popularity of "low-speed four-wheel drive" and "all-terrain mode", even if some cars accelerate quickly from 100 kilometers, they can switch to strong torque to easily get out of trouble.

Can the four-wheel drive be able to go up and down the water and climb the stairs? The city SUV will be scrapped in minutes!

In addition to the above four key factors, there are actually many more hardware requirements for off-road, such as approach angle and departure angle, chassis height, suspension stroke, steering wheel empty position, etc. are closely related to the off-road performance of a car, and the key Yes, it is also closely related to our life safety, so this is the most important reason why I don't want you to go to Huoche.

Summarize:

Some friends asked back: Because of the "switchable four-wheel drive" and "switchable torque" mentioned above, it proves that urban SUVs can also be off-road! It's okay to be mildly presumptuous. After all, manufacturers now know everyone's tastes, so there are many compatible options, but my suggestion is based on the love of the car and life, or wait until there are more professional props. Professional things!