Find out the cause of cars losing driver

Recently, traffic accidents of cars have been caused by frequent "loss of driving" situations. So where does the driver lose the driver?

1. What to do when a car loses its brakes or loses control?

2. What to do to prevent "wrong foot brake and accelerator"?

" Lost driver" is used to describe the driver of the vehicle losing control of the vehicle. In most cases, the incident happened so unexpectedly and so quickly that the driver of the vehicle could barely respond. Sometimes accidents happen and still don't know why. In fact, the cause of the accident is very much, from objective, subjective, control ability of the rider is also quite related to the technical error of the vehicle.

Sometimes accidents happen and still don't know why.

In many cases, when the car runs straight on the road but the position of the steering wheel is not balanced and straight with the direction of the vehicle, making the driver of the vehicle have to constantly grip the steering wheel and hold the steering wheel with both hands so that the vehicle runs in the straight direction . This is especially bad if you are a transportation business whose job is to run long-distance cars day after day.

Unnecessary stresses and fatigue make long-distance driving a difficult and stressful job.

In some cases we can see visually with vehicles (especially buses and trucks) going straight but the front and rear are not aligned. This phenomenon is called "bridge curvature" . Or there are cars that only go a long way to replace the whole set of tires and the more smooth the way you go, the faster the tires are. All of these errors are technical errors related to "wheel angle" , or so called "wheel alignment".

The wrong occurrence of the "wheel angle" occurs very slowly and does not cause immediate consequences . Therefore, it is very dangerous because it makes the driver accustomed to the technical deviation and self-effort to "compensate" for the misleading phenomena of the transport by constantly forceing a force. Enter the steering wheel to let the car go straight.

But in practical use, most of us have not paid due attention to this technical aspect but often only care about brake devices, lights, horns . Even the registration stations only measure the slip across the total of both front wheels, if the right side is 5mm positive and the left side is 5mm negative, when the vehicle runs through the driver's wheel, it will be divided equally. As a result, the total precision is still = 0 (when the vehicle passes the horizontal sliding test plate, no error is detected).

The wrong occurrence of the "wheel angle" occurs very slowly and does not cause immediate consequences.

The reason for this is because the inspection and adjustment of "wheel angle" is a new technical field and requires modern engineering and high precision (large investment) to meet meet this requirement.

Adjust wheel set angle - effective anti-driving measure

In automotive engineering the wheels are designed so that they form certain angles with the body and the road surface.

No matter how modern the car is, there must be four landing wheels. The wheel not only has the task of supporting the whole car but also is designed to be optimal geometry to make the car with good performance as:

1. The best traction ability.
2. Create the most "smooth" driving price.
3. Ensuring the most durability for mechanical parts (trellis, rubber, rubber balls).
4. Minimize tire abrasion.

The design of 4 touch points so that they create with the road surface and create a certain angle depends on the level of design, the utility of the vehicle, as well as the purpose of using the car but the techniques The car maker's engineer will calculate how to make the car have the best performance or the most durable tire set.

No matter how modern the car is, there must be four landing wheels.

In actual use of cars, we see that there are cars for the driver to feel light, firm, flexible, accurate, easy to control, run fast without being slippery, long drive without being tired . and There are cars that drive very "hard" or very "mushy" , or spend a lot of effort to drive the car in the right direction. Why is that?

Let's talk about the difference in engine power or transmission, so the difference is because the cars are designed with different wheel angles, which are suitable for which criteria that is given by the designer. (These criteria are often in conflict with each other. For example, the car runs smoothly, the cornering is light, it is difficult to overcome obstacles and vice versa. So for each particular type of vehicle one must sacrifice the item. This goal is to design the wheel angle so that it is suitable for the other purpose.

In summary, the design of the car wheel angle is a geometry science to ensure that the vehicle has the optimal performance characteristics.

We should go to check cars regularly and periodically.

Because of the design of such a wheel angle, in actual repair and use, we must respect those designs regularly and periodically to check and adjust the design corners: Camber (the angle of the wheel plane versus the vertical view from the front of the car, Caster (backward angle of the steering wheel spindle versus the vertical view from the side of the car), Toe-in (the precision of the wheel) wheel), SAI (Sterring Axis Inclination), Thrust Angle (the deflection angle between the central axis of the vehicle and the direction of movement of the rear axle) to the standard of the manufacturer that process is called the solution to adjust the angle of the four wheels (Total Wheel Alignment).

Today with the help of information technology achievements such as specialized software and microprocessors, as well as 3-dimensional camera scanning techniques, people have built human replacement apparatuses. It is possible in a short time to automatically test and adjust the wheel angle accurately and conveniently even hidden corners and abstract corners that are equal to the human eye (tuner) or technique Infrared or laser technology (traditional alignment method) cannot be done.

Your car runs daily, due to the natural mechanical wear of the steering system structures (tuner checkers, vertical checkers, A-beams, dampers, springs .) leading to the positioning angles of the wheel. wrong with the manufacturer's standard. This makes the wheels will not move in the same direction to the uneven worn-out tires (because of being dragged during spinning), the steering wheel is twisted when the car goes straight, the driver always has to force a force into steering wheel to keep the car running straight, resulting in fuel loss and unsafe. (When the vehicle is cornering, it is shocking - the two wheels will be pushed to the same direction, which will lead to the robbery of the steering wheel or " loss of driving").

After 10,000km, the car will need to re-align the wheel angle and tire island scale.

On the other hand, due to the bad and uneven road, the wheels tend to be worn unevenly, leading to a tapered wheel (the naked eye is not visible). Just need to difference 1mm to the circumference between the right and the left, when the wheelchair is 100m or more, the screw level is significant.

On the other hand, when the vehicle runs due to the natural wear of the robot, the precision will be wrong compared to the standard. When the precision is 1mm, it means that if your car runs 1m, the tire will be dragged horizontally (horizontal) 1mm. That means if your car goes 1000km, the front tire will be dragged to 1km. Plus the weight load of the car (an average of 400kg / wheel) will cause tire tire wear significantly.

In the maintenance process of the automobile manufacturer, every 10,000km, the car will need to re-align the wheel angle and tire island scale. The re-calibration of the wheel is worth preventing damage and extending the life of the vehicle rather than overcoming damage, similar to the periodic change of engine oil.