Troubleshooting of experimental testing equipment for automotive seals
Qingdao Shuangling Technology Equipment Co:Automotive Seal Test Equipment(math.) genusConveyor belt test equipment(math.) genusTransmission belt test equipment(math.) genusHose test and inspection equipmentSince its establishment, the company has been committed to research and development, manufacturing of national industrial products production license and mining product safety mark management of rubber conveyor belts, transmission belts, hoses, special test, testing equipment and new chemical materials and products to promote the application of "to meet the standard requirements to ensure product quality, improve service levels, and achieve mutual benefit and win-win" as the company's basic management policy. "As the company's basic business policy. The company adheres to the rigorous scientific attitude, the development concept of striving for the first and active market thinking combined with the user as one, and jointly improve the quality control means, including the interests of end-users of the product to be guaranteed.
Cylinder pressure detection and troubleshooting, detection and diagnosis of the problem analysis: the piston reaches the upper end of the compression stroke of the combustion chamber pressure is the cylinder compression pressure, cylinder sealing good or bad can be determined by measuring the maximum compression pressure of the cylinder, the main tool is the cylinder pressure gauge. Analyze the test results data, you can refer to the following rules. First, the pressure is low in the adjacent two cylinders, while the other cylinders behave normally, can be mainly considered cylinder head bolts are not tightened, or the adjacent two cylinder gasket leakage caused by; second, in 2 to 3 measurements, some cylinder pressure readings are suddenly high and low, which indicates the existence of valve closure problems; third, when the pressure reading is low in a cylinder or a number of cylinders, the use of spark plugs or injector holes injected into the viscosity of the larger Lubricant 20 ~ 30mL, test again, if the cylinder pressure does not rise, then the existence of valve closure is not strict; Fourth, when the pressure reading is high in a cylinder or a number of cylinders, while the vehicle driving overheating or vibration phenomenon, which is often due to a number of overhaul of the cylinder bore increase resulting in a change in the compression ratio of the cause, or too much carbon; Fifth, it should be noted that the compression pressure standard of different Model engine, the standard value of compression pressure is also different.
Diagnostic method and step by step analysis: diagnostic method is analyzed as follows: first of all, the air filter needs to be removed, the throttle, plus the oil port cover and the radiator cap is opened, in the compressed air air source on one end of a 3m long hose is connected to a spark plug or injector holes to the other end of the conical rubber tip inserted. Determine the position of the measured cylinder piston compression upper stop is realized by shaking the engine crankshaft. Then, the transmission into low gear, the parking brake needs to be tightened, open the air compression switch, listen carefully to the sound of engine air leakage. Intake door is not closed tightly, will appear in the intake pipe mouth leakage sound; exhaust door is not closed tightly, will appear in the exhaust muffler gas port leakage sound; cylinder liner is not sealed cylinder and water jacket connected, will be seen in the radiator water port bubbles; cylinder piston with serious wear, will be heard in the oil port leakage sound.