The car electrical, f' set! Prepare!
The probability of emergence of the original fault combination is the basic characteristics of various faults assigned to various repair routes.
Second, to determine the functional relationship of the various electrical equipment Features of electrical equipment features requirements: Single equipment troubleshooting does not guarantee the failure of a system; eliminate one electrical equipment can eliminate another fault, this situation must be the same repair Within the process route.
First, it is required to carefully study the interrelationships between the internal equipment of each power system. 2. It is necessary to connect each other from the structure of the electrical equipment so that the failure of one equipment can be simultaneously repaired when the other equipment fails.
Establishing a qualitative form of the functional relationship characteristics, and then merging some faults to a repair route according to a certain principle, can clearly classify some faults and their combinations into different levels.
Third, determine the economic rationality of electrical equipment repair in different technical conditions The main task of repair production is to use the remaining durability of electrical equipment to ensure the economic and effective repair of automotive electrical appliances and its use of reliability. The state of electrical equipment technology varies widely, so the expenditure for electrical repair is different. At this time, it may happen that it is economically uneconomical to repair individual fault combinations. Therefore, the economic rationality of electrical repair is the main feature of the electrical condition set divided into various repair process routes.
Fourth, to determine the process similarity of various faults and combinations The purpose of the parts to be repaired is to form an electrical repair route that has common characteristics, whether in process or in its solution. Therefore, together with the characteristics describing the condition of the electrical appliances, it is also necessary to cite the features that can distinguish all faults and their combinations into similar categories of the process. This distinction should not only be based on the common consistency of the major repair procedures, but also on the common consistency of the electrical equipment used.
When appraising parts, it is necessary to consider the rationality of the repair, which will tend to complicate the work of the inspection and classification section. Because the inspectors must not only remember all the fault combinations, but also can not forget the price standards for scrapped electrical equipment. Obviously, if the amount of errors in determining the state of electrical technology is increased, the economic benefit of repairs and production will be reduced. In view of this, when classifying failure combinations by repair route, the most clearly distinguishable features among various failures should be cited.
From the point of view of the repair of electrical equipment in the process specification organization, it helps to integrate the uncovered combination of faults into a few typical types of process routes, which greatly simplifies the selection of the best route for the process route. The number and content of the route. It is sufficient to give appraisal of only a limited number of various schemes of pre-classified typical routes.
Before directly entering the formulating repair route, it is necessary to use the principle to divide the entire fault combination into reasonable categories and select the best plan so as to obtain the maximum benefit of the repair of electrical equipment.
Idle speed, jitter, and even no idle speed of the engine, while an empty vehicle accelerates well on flat roads, but it is boring when the high-speed high-speed gears go uphill. This phenomenon is generally due to wear of the cylinder liner or lax valve closing. During the idle adjustment, a “click†sound can be heard at the muffler mouth, which is a phenomenon of running gas caused by the exhaust valve closing. The one-cylinder misfire method can be used to find out which cylinder exhaust valve is faulty.
When the engine is running, a thickened flue gas emerges from the oil filling nozzle, and a distinct snoring sound can be heard. Using the off-fire method, the cylinders were turned off in order, and the smoke and helium gas in the nozzles were observed. After a certain cylinder breaks the fire, the smoke is reduced and the snoring gas is weakened, which can be determined as the fault location. This fault is mostly a piston ring counterpart and stuck air leakage.
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