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Off-road trailer trivia: the things that have to be said between front and rear

2021-06-16 15:45:08
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What exactly matches an off-road trailer?


Now, many network we media and even some sales, will say: more than 1.6L displacement can be dragged. But in fact, the traction capacity needs to take into account the vehicle power, vehicle weight, rear suspension can withstand pressure and other factors. For example, some vehicle displacement is more than 2.0L, but its own weight is relatively high, the dynamic response itself is not very good, coupled with towing will lead to climbing effort, increased fuel consumption and other conditions. In addition, the rear suspension of some cars is relatively soft. When towing the trailer, the travel of the rear suspension of the main car will be excessively compressed, and the trailer body will not be in the horizontal position, which leads to the problem of poor driving stability.


For playing off-road trailers, the most recommended is a pickup truck, off-road vehicle this type of non-carrying type body, with a chassis girder model traction. Because the non-load-bearing body chassis beam is very strong, can better resolve the impact; At the same time, the weight of the pickup or off-road vehicle itself is relatively large, which can better inhibit the impact of towing on the front car; In addition, the rear axle of the pickup or off-road vehicle adopts the overall bridge form, which is relatively better in terms of load performance and can be used to drag some heavier RV.


And such as SUV, car can also be used to drag the RV, but not necessarily suitable for dragging the RV, many RV even one or two people can be pulled away by hand. A lot of people may be curious: why a lot of saloon cars in Europe are pulled by cars? In fact, the overall development of the RV camping industry in Europe is relatively early, the design of the RV is more mature, and the lightweight of the vehicle is more excellent. General 7 meters of the length of the body of the European imported salouring car, the weight of the whole vehicle is only about 1100-1300kg. In addition, in Europe and North America are on the pull-type saloon car safety standards have clear rules, requires off-road pull-type saloon car shall be borne by the axis of the main body weight, and in view of the traction frame to pull the ball under pressure and have clear requirements: European standard for towing under pressure is 7% of the weight of the trailer saloon car, in North America, insist on at around 10%.


In addition, it is from the European RV camping industry overall development is relatively early, many cars in Europe at the beginning of the design took into account the traction trailer trailer RV this situation, the rear bumper inside the hidden trailer ball head and power interface installation. So, a lot of European imported cars or some joint venture brand cars or SUVs from Europe itself has a certain traction qualification, can be used to traction some of the lighter towing type saloon car. Elddis 550, for example, has a gurgling mass of 1300kg and a gurgling total weight of 1500kg, according to European gurgling standards -- 91kg under no load or 105kg under full load


What do you need to pay attention to when tractor trailer first need to pay attention to the weight ratio of the car before and after the car, the weight of the car after the brake, to prevent the generation of "folding effect". The so-called "folding effect" refers to the trailer pushing the tractor forward, causing the rear of the tractor to produce a certain rotation, or even turn around. The "reverse effect" usually occurs during emergency braking, downhill driving, or when steering while braking. The main reason is that the current trailer trailer brake system mainly has two kinds: crash brake and electric brake, no matter which kind, are the main car first brake, trailer brake, before and after the car brake time interval is very small, generally in milliseconds or even microseconds as a unit; But there is still a time gap. So, at a fraction of a second between the front and rear brakes, the car behind will push against the car in front. If the overall weight of the trailer is heavy, the car in front may not be able to hold the car behind. If by chance there is certain Angle deviation between the car before and after right now, the car after can cause the rotation of certain range generation of car tail of car before, even, cause car before to turn around directly likely. Therefore, when using off-road trailers, it is necessary to put the materials in front of the car as much as possible to reduce the weight of the car after it. And to reduce the heavy brake situation as far as possible, so as to prevent the "folding effect".


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