A sharp shift of the rear axle of the front-wheel drive car in the direction opposite to the turn requires an instantaneous driver response based on the physics of traffic and traffic rules. Unlike the rear-wheel drive classics, where gas must be added when the rear is demolished, here the algorithm of actions is radically different and often contradicts the first instinct. The main mistake in a stressful situation is a reflex press on the brake pedal or a sharp discharge of gas.This leads to complete wheel lock and loss of handling. Understanding that the front wheels are traction and guides, allows you to correctly distribute the weight of the machine and align the trajectory without going to the oncoming lane or roadside.
The mechanics of the process of loss of stability on the front wheel drive is tied to the coupling of tires with the coating and mass distribution. When it comes to side-slipThe centrifugal force tries to push the car out of the corner. If at this moment the driver frightenedly releases the accelerator pedal, the weight of the car is transferred to the front axle, unloading the rear. This action turns the car into an unguided projectile that begins to rotate around its vertical axis. The correct reaction involves not only steering, but also competent dosing of traction to make the front wheels โpullโ the car out of the skid.
According to paragraph 10.1 of the traffic rules, the driver must drive the vehicle at a speed not exceeding the established limit, taking into account the intensity of movement, features and condition of the vehicle and cargo, road and meteorological conditions. However, if the skid has already occurred, extreme driving skills come into play. front-wheel drive It has the property of tightening the trajectory in the turn when adding gas, which paradoxically can help stabilize the machine if you act carefully. Ignoring these principles often leads to an accident, where the driver who failed to manage is guilty.
Physics of skidding and the work of wheel clutch
Understanding the physical processes under the car is critical to safe driving. Coefficient of adhesion Road tires are a variable value depending on the temperature of the asphalt, the presence of water, snow or ice. On a front-wheel drive car, the front wheels do triple work: they accelerate the car, brake and set the direction. When skidding begins, this means that the lateral force has exceeded the adhesion force of the tires with the coating. At this point, any sudden movement of the steering wheel or pedal only aggravates the situation, since the wheel does not have time to โgrabโ the road.
The feature of the front-wheel drive is that when thrust is applied, the front part of the car is pressed against the road, increasing the grip of the front wheels. This allows the use of gas as a stabilization tool. If the driver removes his foot from the accelerator pedal, the front part is unloaded, and the car becomes "empty" and unstable. Wheel locking when braking in skid turns tires into skis, completely depriving the driver of the ability to adjust the trajectory with the steering wheel. Thatโs why the anti-lock braking system (ABS) is a crucial safety feature, but even itโs not all-powerful on slippery surfaces.
- ๐ Overloading the front axle during the discharge of gas provokes further twisting of the car.
- ๐ The wheel lock reduces the coefficient of traction to the minimum values.
- ๐ Traction on the front wheels helps to pull the car out of the side sliding.
- โ๏ธ The 60/40 weight distribution in favor of the gear makes the front-wheel drive more predictable in skid than the rear.
โ ๏ธ Attention: Attempt to brake sharply at the beginning of skidding on the front-wheel drive car is guaranteed to lead to complete loss of control and uncontrolled rotation.
Algorithm of the driver's actions during demolition and skidding
The actions of the driver should be worked out to automatism, since in a real situation there is no time for reflection. When a rear axle skids on the front-wheel drive car, the first and most important action is to turn the steering wheel towards skid. If the "feed" of the car is carried to the right, the steering wheel should be turned to the right, if to the left - respectively, to the left. This counterintuitive action is necessary to ensure that the front wheels are again in the course of the movement of the machine, and not across the trajectory.
The second key point is the operation of the gas pedal. Unlike rear-wheel drive, where gas often needs to be discharged, front-wheel drive is recommended. thrust. This action will load the front axle, increase the grip of the front wheels and allow them to pull the car out of the skid, leveling the trajectory. The main thing is not to do this with a jerk, so as not to provoke the demolition of the already front axle. Smoothness and predictability of actions are the key to success. If the skid occurred on a turn, the trajectory must be straightened, twisting the steering wheel in the direction of the turn, but taking into account the correction for slip.
โ๏ธ Algorithm of the skid exit on the front drive
Braking in this situation is permissible only in one case - if the car is equipped with ABS and you just need to reduce the speed without blocking the wheels. However, even in this case, it is better to stabilize the car with the steering wheel and gas first. Clutch pedal on a manual transmission at the time of skidding is squeezed only at the last moment, if the collision is inevitable, so that the engine does not stall and it is possible to maneuver. But to get out of the skid, the clutch squeeze is not required, since we need traction on wheels.
Common mistakes of drivers and their consequences
The most common mistake is panic inhibition. Reflectively, a person feeling a loss of control, presses all the pedals at once. On a front-wheel drive car, that's a fatal mistake. The brakes throw the weight in front, unload the rear, and the car begins to spin with acceleration. Even the presence of stabilization systems may not cope with such a rude intervention of the driver. Another mistake is the โtwistingโ of the steering wheel. Drivers often twist the lamb too hard and sharply, which leads to a reverse drift to the other side, creating a โpendulumโ effect that almost always ends with a ditch exit or head-on collision.
Another mistake is to look at an obstacle or a roadside, rather than looking at a free trajectory. Where the driver looks, the car goes, this is the basic principle of goal-setting. If you look at a tree, youโre likely to crash into it. You need to focus your eyes on the exit from the corner or on the free lane. Drivers often forget about the momentum They try to correct the trajectory with the steering wheel alone, forgetting about the gas operation, which is the main control tool on the front wheel drive.
| Mistake. | Physical cause | The result |
|---|---|---|
| Braking abruptly | Rear axle unloading, loss of grip | Uncontrolled rotation |
| Dramatic discharge of gas | Engine braking, weight redistribution | Slope-increase |
| Steering against skidding | Increased angle of attack of wheels | Overturning or going on-site |
| Squeeze the clutch | Loss of traction on front wheels | Loss of traction steering ability |
โ ๏ธ Attention: Squeezing the clutch during skidding on the front-wheel drive car disables traction, depriving you of the main stabilization tool - the ability to pull the car with the front wheels.
Legal aspects and liability under the SDA
From the point of view of the traffic regulations, skiding is not a violation in itself, but the consequences of inept exit from it are often qualified as a violation of paragraph 10.1 (failure to choose a safe speed) or 10.2 (movement at a speed that does not provide constant control). If an accident occurs as a result of skidding, traffic police inspectors will evaluate the actions of the driver in terms of the possibility of preventing an accident. The argument โIโm driftingโ is rarely accepted as an excuse, as the driver is obliged to anticipate the change in road conditions.
In the case of entering the oncoming traffic lane during skiding, even if it was a forced maneuver to avoid a more serious accident (for example, hitting a pedestrian), this can be regarded as a forced maneuver to avoid a more serious accident. necessity. However, to prove this after the fact is difficult and requires expertise. If the driver simply failed to manage on a slippery road and went on an oncoming trip, he faces deprivation of rights or a large fine.
Insurance companies are also closely studying the circumstances of the skidding. If it is proved that the driver used tires out of season or with worn tread, the payment for CASCO may be refused, and in the case of CSAGO, regression may be applied. Therefore technicality The car and the timing of the tire season is not only a matter of safety, but also financial protection.
Prevention of skids and preparation of the car
The best way to fight drifts is to prevent them. For owners of front-wheel drive cars, it is critical to monitor the condition of the tires. The residual tread height should be at least 4 mm for winter tires and 1.6 mm for summer tires, although experts recommend changing tires sooner. The pressure in the tyres shall be in accordance with the manufacturer's recommendations as indicated on the door counter or in the instructions. Over-pumped tires reduce the contact stain, and under-performed tires can lead to overheating and unstable behavior.
Particular attention should be paid to the suspension. Worn shock absorbers cannot effectively press the wheels against the road, which significantly increases the risk of skidding on irregularities or during braking. Silent blocks and ball supports must also be in good working order to ensure a clear steering response. Adjustment of the angles of installation of wheels (fall-down) should be carried out regularly, especially after falling into deep pits. Wrong breakup can cause the car to side and uneven wear of rubber, which reduces the coupling properties.
The secret of winter rubber
Winter rubber remains elastic at low temperatures, unlike summer rubber, which โblownsโ. The use of summer rubber at temperatures below +7ยฐC dramatically reduces the coefficient of adhesion, making skidding almost inevitable during active maneuvering.
- ๐ง Regular check of tire pressure (at least once a month).
- ๐ Use of high-quality seasonal rubber of proven brands.
- ๐ฉ Diagnostics of suspension and steering before the winter season.
- ๐งผ Keep the glass and headlights clean for good visibility.
Training skills in a safe area
Theoretical knowledge must be put into practice. For this purpose, counter-accident driving courses are ideal. In the special areas, instructors simulate skids at a safe speed, allowing the driver to feel the behavior of the car and work out the correct movements. This helps to overcome fear and develop muscle memory. In the real world, your hands will do what they have done dozens of times in training.
It is important to train on the type of drive you drive every day. The behavior of front-wheel drive, rear-wheel drive and all-wheel drive cars in the skid differs dramatically. The skills gained on the "classic" can harm the front wheel drive. In training, not only the exit from the skid is worked out, but also emergency braking, bypassing obstacles and maneuvering in a limited space.
Tip: Find an empty snow-covered parking lot or playground and try to specifically rip the car into a skid at a safe speed to understand how your car responds to the operation with the steering wheel and gas.
Constant practice and conscious driving minimize the risks. The driver should always keep a reserve of distance and speed in mind, given that at any time the clutch may disappear. Predictability The driverโs main weapon on a slippery road. Do not make sudden movements, plan the trajectory in advance and be attentive to the signals of the car.
What to do if the skid occurred on the ice?
On ice, the amplitude of movement should be minimal. The steering wheel is very smooth and on small corners. The gas is added in microdoses. The main task is not to tear the wheels into towing, as on ice this happens instantly. The engine braking here can be more efficient, but only very smooth.
Will the ESP system help you to get out of the skid?
The course stability system (ESP, ESC, DSC) helps by braking the desired wheels and reducing engine power. It is not omnipotent and does not abolish the laws of physics. If the speed is too high or there is no grip at all (ice), the system will not be able to keep the car on the road. In addition, it can sometimes interfere with experienced drivers who want to use traction to get out of the skid.
Do I need to squeeze the clutch when skidding on the โmechanicsโ?
In most cases, the clutch is not needed on the front wheel drive, as we need traction on the wheels to stabilize. It is worth squeezing the clutch only if the engine speeds have fallen to a minimum and it is about to stall, or if you need to urgently disconnect the engine and transmission to prevent skidding from braking by the engine (although the latter rarely helps with the skid already begun).
How does all-wheel drive affect skid?
All-wheel drive cars (4WD/AWD) behave differently. They are more stable in skid, but if the breakdown still occurred, it is more difficult to remove all-wheel drive from it. Often a combination of gas and steering and sometimes a handheld is required. The algorithm depends on the type of all-wheel drive (permanent, plug-in, with a clutch).
โ ๏ธ Note: Remember that no electronic systems will replace sober calculation and compliance with the speed mode corresponding to road conditions.