Daily traffic requires careful and detailed analysis of eight major signs of vehicle failure

Category:Repair technology - Date:2018-04-19

1, mutation of work condition

A mutation in the so-called work condition Car the abnormal condition of work suddenly occurs, which is a common symptom of malfunction. For example, when the engine is suddenly flameout, it is difficult to start again, or even can not be started; the engine has a sudden reduction in driving power and a powerless driving; the sudden brake failure or deviation or even failure during the driving. The symptom of this kind of fault is obvious, so it is easy to detect.

2, abnormal sound

abnormal noise in the course of driving is the &ldquo of vehicle failure; &rdquo is the alarm. In the course of a sudden noise, as the driver should be aware of the car problem, should stop immediately check, not let the vehicle “ the disease operation ”

3, exhaust smoke is not normal

during the working process, the main components of normal combustion products should be carbon dioxide and a small amount of water vapor. If the engine does not burn properly, the exhaust will be mixed with unburned carbon particles, hydrocarbons, carbon monoxide and a large amount of steam. In addition, there are nitrogenous compounds and so on. At this time, the color of the tail gas may turn black, blue or white, that is to say, exhaust smoke is abnormal. For gasoline engines, normal exhaust should have no obvious smoke. However, when the lubricating oil moves on the cylinder, the exhaust gas is blue. When the combustion is incomplete, the exhaust gas is black, and the tail gas is white when the oil is mixed with water.

4, superheated high temperature

usually appear in engine, transmission, drive axle, main reducer, differential and brake assembly. For example, the engine overheating, most of the cooling system is a problem, is the lack of coolant or pump does not work; the transmission and driving bridge overheating, most of the lack of lubricating oil; brake overheating, most of the brake shoe does not return to position. These phenomena can be directly reflected by the dashboard warning lights. They need to be observed when driving, or the temperature of the exterior can be tested by hand.

5, leakage

leakage refers to the leakage of fuel, lubricating oil (or gear oil), brake fluid (or compressed air) and power steering system oil. This is also obvious symptoms of failure, careful observation can be found. For example, when the compressed air leaks, it can clearly hear the sound of leaking.

excessive consumption of.6, fuel and lubrication

excessive consumption of fuel and lubricating oil indicates that the technical condition of the vehicle has deteriorated and malfunction has occurred.

7, with special odor

During the operation of the car, such as brake lag, clutch slip and other faults, it will emit the smell of the friction plate; when the engine is overheated and the lubricating oil channeling is burned, it will diverge and send out a special smell; the circuit short circuit and the iron lap lead will be burnt and burnt when the wire is burned.

8, abnormal appearance of automobile

vehicles parked on a flat site and checked for appearance, such as transverse or longitudinal skew, are abnormal appearance. Most of the reasons are car frame, body, suspension, tire and other failures, which will cause unstable direction, deviation, center of gravity transfer and wheel “ eat ” and other malfunctions.

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