Standard Fault Analysis and Countermeasures for Light-weight Semitrailer
Posted on

Common Fault One: The Engine Fails to Start The engine cannot be started. It is one of the common faults. The reason why ignition cannot be performed is more complicated. Common causes include:
1. The vehicle circuit is faulty or the battery is dead.
2, ignition coil or spark plug failure. The ignition coil is mainly responsible for converting the low voltage electricity into high voltage electricity, thereby driving the spark plug to discharge and ignite. If the ignition coil or the spark plug fails, it may cause the engine to start difficultly or fail to start.
3. Failure of the oil circuit, damage to the gasoline pump, lack of oil in the fuel tank, etc. may also cause the engine to fail to start.
Solution: If the battery is dead, you can use the cable or emergency power to ignite. If you still can not start, it may be the vehicle circuit or oil circuit failure, it is recommended to send the factory to repair. Common fault II: Tire, puncture and other failures.
Tire failure is also one of the common faults of vehicles. After the tires are punctured, spare tires should be replaced in time. If conditions are available, tires should be repaired in time. If it is a run-flat tire (explosion-proof tire), although the air leakage can continue to travel, but it is recommended to timely repair or treatment to avoid tire damage. If the vehicle is punctured while driving, you must not slam on the brakes, beat the direction, stabilize the direction, brake slowly, and deal with it calmly. After the vehicle is stopped, replace the spare tire or contact the rescue.

Common fault three: engine flameout during driving
When the engine is off during driving, it is very easy to cause dangerous faults. After the engine is turned off, the steering wheel and brake booster will disappear and the vehicle will be easily out of control. In the event of a flameout during driving, first stabilize the steering wheel, slowly apply the brakes, and park the vehicle on the side of the road. Excessive carbon deposition, blocked fuel lines, battery, water tank, engine belt and other components may cause engine flameout. If it is not possible to determine the cause of the fault, it is recommended to send the factory to repair the common fault. Four: Brake failure Failure of the brake or complete failure of the brake is very significant. Serious failure. There are several reasons for this:
1, maintenance is not in place, the brake system is not due maintenance, resulting in such as brake oil dirty, brake master cylinder seal is not strict or excessive impurities, brake master cylinder or sub-pump leak, vacuum pump failure failure .
2, due to improper operation, a long brake on the brakes (long distance downhill), frequent heavy step on the brakes, brake pads will overheat, resulting in thermal decay phenomenon, eventually leading to brake failure, or even complete failure.
Solution: Do the maintenance of the brake system. Check the brake discs, brake pads, and other components frequently. If necessary, replace them in time. In daily driving, try to avoid long brakes. In case of long downhill sections, it is recommended to work with low gears and use engine brakes to avoid overheating of the brake pads. Common Fault 5: Exhaust Abnormality The exhaust smoke of the engine represents the engine's working status. If there is an abnormality, there is a certain problem with the engine. The specific performance is as follows: 1. The exhaust is black: The engine is not completely burned, and the ignition timing or the replacement of the fuel should be adjusted. 2, the exhaust is white: fuel or water in the cylinder, you should check the engine or fuel, check the engine cylinder head gasket wear, or fuel marking is not enough. 3, the exhaust is blue: the engine burning oil, engine valve oil seal should check whether there is aging, damage, check the cylinder barrel wear conditions, etc., it is recommended that the car repair. Common Fault Six: Steering Wheel Jitter
Steering wheel jitter is generally caused by the tire, common faults are: 1, tire deformation: tire aging or improper maintenance caused by uneven force in the drive, resulting in steering wheel jitter. 2. Abnormal tire dynamic balance: The numerical value of tire dynamic balance is abnormal, which will cause the vehicle steering wheel to shake. It is particularly obvious in a certain speed range (eg, 80-100km/h). Solution: Pay attention to the daily maintenance of the tire. If there is a phenomenon of aging caused by aging, it is recommended to replace the tire. If the vehicle is dithering at a certain speed, it is recommended to redo the tire balance. Common faults VII: high oil consumption The causes of excessive oil consumption are relatively complex. Commonly encountered conditions are as follows: 1. The oil path is not smooth: too much carbon deposition leads to blockage of the oil circuit, causing excessive fuel consumption.
2. Abnormal brakes: The brake pads do not return, causing the vehicle to stay in a brake state. 3. Spark plug failure: General spark plugs need to be replaced when the vehicle is traveling for two or thirty thousand kilometers. If you feel that the vehicle fuel consumption is too high, you can check whether the spark plug has ignition. Abnormal situation 4, dirty air filter: vehicle maintenance needs to replace the air filter in time, otherwise it may lead to poor air intake, resulting in increased fuel consumption. Solution: Check the oil circuit, circuit, and brake system to confirm whether there is a fault, replace the air filter in time, and maintain the vehicle in time. Common faults 8: Abnormal sounds of abnormal sounding vehicles are often harbingers of faults before they occur, so they should be taken seriously. Common abnormal sounds can be divided into two situations: 1. Body abnormal sound: When accelerating, braking, or cornering, the vehicle body emits a slight abnormal sound, which is usually caused by insufficient body rigidity and does not affect normal driving. However, if there is severe noise, it is recommended to stop the inspection.
2. Abnormal noise in the engine room: The engine abnormal noise is generally a harsh whistling, usually caused by timing belts, fan belts, etc. It is recommended to check whether there are problems such as aging, deformation, and displacement. If metal friction or impact sounds occur while the engine is running, it may be caused by mechanical damage. It is recommended to check the generator, water pump, power steering pump, etc. and repair it in time.
Common fault 9: odor smells when the vehicle is driving, which is likely to be the performance of some components. Common performances include:
1. Burning odor: Unpleasant burnt smell and foot odor during driving. It is very likely that the clutch plate is overheated or has burned out. Stop and check immediately. In addition, when the handbrake forgets to release, there will be an unpleasant burning smell.
2, plastic paste flavor: plastic burning or paste smell, it is likely to be caused by the circuit, electrical short circuit in the car, need special attention, if accompanied by smoke phenomenon, should immediately stop, cut off the circuit, prepare the fire extinguisher, so as to avoid Self-ignition. If smoke does not occur, it is mostly due to the high temperature of the electric wire. Check or call for assistance immediately. Common fault 10: The water temperature is too high.
We know that the engine generates a lot of heat during operation, which requires the use of coolant and fans to help cool the engine. If the coolant temperature is too high, it means that the current cooling system is not working properly. Common reasons are:
1. Cooling fan failure: The fan stops rotating, causing the heat to dissipate in time, causing the water temperature to be too high. The fan failure may be caused by a malfunction of the temperature switch or water temperature sensor.
2. Insufficient coolant: The coolant in the water tank (antifreeze or water) is insufficient, usually because the water tank is dirty and the heat dissipation is not good. The coolant pressure is high and causes overflow. It may also be because the cylinder gasket is damaged, which causes the coolant to enter the engine, resulting in insufficient.
3, thermostat damage: damage to the thermostat will lead to poor circulation of the coolant, causing the water temperature is too high.
4. Clogging of water tanks: Usually caused by dirty water tanks, it is necessary to clean the dirt inside and outside the water tank to ensure the circulation of the cooling liquid.
5, pump failure: damage to the water pump will seriously affect the coolant circulation, resulting in high water temperature, the usual pump failure is caused due to impeller damage. Solution: The phenomenon that the water temperature is too high is usually caused by a mechanical failure. Therefore, it should be stopped and checked for the first time. If you are not sure about the cause of the malfunction, it is recommended that you wait for rescue. Shandong Hongsheng Automotive Technology Division provides light semi-trailer maintenance knowledge
In the process of driving, safety is always the first priority. Routine maintenance inspections of vehicles are indispensable. If there is a failure, everyone need not panic, park the car in a safe place, and take appropriate measures. If you cannot solve it, it is recommended that you either drive the car to a maintenance site or wait for assistance. I hope that the above-mentioned common faults can help you when you encounter related problems, so that you can be sure that you will not be alarmed.

According to the type of sensor, the Touch Screen is roughly divided into infrared type, resistance type, surface acoustic wave type and Capacitive Touch Screen four kinds. The design of capacitive Touch screen is reasonable, but the problem of image distortion is difficult to be solved.


Capacitive touch screen


The touch screen works by using the body's current induction process. A special transparent metal conductive substance is coated on the surface of the glass. When a conductive object touches the glass, it changes the capacitance of the contact, so as to detect the position of the touch. But touching a non-conductive object with a gloved hand or hand does not respond because of the addition of a more insulating medium.


Capacitive touch screen can sense light and fast touch, anti-scratch, not afraid of dust, water and dirt influence, suitable for harsh environment. However, capacitance varies with temperature, humidity or environmental electric field, so its stability is poor, low resolution and easy to drift.

Capacitive Touch Screen

Capacitive Screen,Projected Capacitive,Capacitive Touch Panel,Projected Capacitive Touch

Tonya Display Limited , https://www.tydisplay.com