Single point injection and multi-point EFI
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Review: A, single point injection and multi-point EFI comparison: single point injection is also called the motorcycle carburetor, is controlled by computer will be a cavity in the oil is injected into the similar carburetor, (only one nozzle) and then turn into the cylinder combustion. Multi point injection is the oil injected directly into the gas cylinder combustion, one for each cylinder head. Multipoint EFI EFI technology development results, because it is sprayed directly into the cylinder combustion respectively, so the fuel ratio control is more accurate, better engine emissions, speed faster, throttle sensitive. Single point injection is the result of the carburetor to EFI technology transition, because with the carburetor work in basically the same, so don't change the original carburetor engine cylinder design, directly to the carburetor to change a set of computer control equipment. Two, EFI engine open-loop control and closed-loop control: control refers to the engine computer can process according to engine speed sensor, the tail is oxygen sensor feedback back the information, control fuel further more accurate than, so that the engine can fully burning at different speeds. Open loop control refers to the engine according to set parameters in the computer (the parameter is some theories on the curve fitting) to adjust the fuel under different speed ratio, not according to the feedback information. Therefore, if the engine changes, is not to the feedback information and timely adjustment. Closed loop control is mature results of engine of the computer, and the open loop control is only transitional technology. Economic type of car engine: the multi point injection engine closed-loop control: sail, antelope, 金夏利, Xiali 2000, Yue, Pario, polo. Single point injection: ICAS, Chery, Xiali 7101, 7101UA
Review: A, single point injection and multi-point EFI comparison: single point injection is also called the motorcycle carburetor, is controlled by computer will be a cavity in the oil is injected into the similar carburetor, (only one nozzle) and then turn into the cylinder combustion. Multi point injection is the oil injected directly into the gas cylinder combustion, one for each cylinder head. Multipoint EFI EFI technology development results, because it is sprayed directly into the cylinder combustion respectively, so the fuel ratio control is more accurate, better engine emissions, speed faster, throttle sensitive. Single point injection is the result of the carburetor to EFI technology transition, because with the carburetor work in basically the same, so don't change the original carburetor engine cylinder design, directly to the carburetor to change a set of computer control equipment. Two, EFI engine open-loop control and closed-loop control: control refers to the engine computer can process according to engine speed sensor, the tail is oxygen sensor feedback back the information, control fuel further more accurate than, so that the engine can fully burning at different speeds. Open loop control refers to the engine according to set parameters in the computer (the parameter is some theories on the curve fitting) to adjust the fuel under different speed ratio, not according to the feedback information. Therefore, if the engine changes, is not to the feedback information and timely adjustment. Closed loop control is mature results of engine of the computer, and the open loop control is only transitional technology. Economic type of car engine: the multi point injection engine closed-loop control: sail, antelope, 金夏利, Xiali 2000, Yue, Pario, polo. Single point injection: ICAS, Chery, Xiali 7101, 7101UA
Nozzle EFI car, if not normal to open the fuel injection, will cause the engine not working, common maintenance methods are replaced with new parts, the nozzle of the broken parts can be repaired. Some disabled long car, if difficult to start, or after starting the engine nozzle shaking, no open normally caused by this phenomenon is the individual nozzle or cold start, EFI car is old, the more this phenomenon. Then you can get a screwdriver, contact the nozzle to nozzle nozzle work, the normal work of the sound is crisp patter, frequency with the engine speed increases, the abnormal sound weaker, or simply not to hear the clatter of nozzle opening, this is because the auto oil has been used for a long time later, the internal will precipitate glial more sticky, needle valve nozzle will be glial stick, cause the needle valve side. It does not need to replace the nozzle, can remove the nozzle, the nozzle of the measured resistance, different car, different types of nozzle resistance is different, but the resistance of the same car should be basically the same, the same car nozzle resistance value of maximum error for high resistance nozzle should be in 0.8 Omega, for the low resistance injector, in 0.2 Omega within the resistance value, if qualified, we can try to repair according to the following method.
Take a bottle of carburetor cleaning agent, to find a small bottle, the carburetor cleaning agent is sprayed on the bottle, then put into the oil mouth cleaning agent inside the cap into the nozzle end, filled, the nozzle exterior for cloth, and then sealed with transparent tape upper oil inlet, to prevent the cleaning agent evaporation then, the nozzle inlet, placed on the night, second days, the nozzle mounted to the electronic test instrument can carry out repair work. Spray cleaning tester of many types, including a domestic ANLI-2000 (safety signs) machine is very good, this machine on proprietary file was used to repair the nozzle. The boot after the election to ninth gear, machine nozzle wire inserted in the nozzle, press the start button, the machine will send to the nozzle driving pulse, then can get a screwdriver with wooden handle, one end of the central tap nozzle, nozzle can be recovered action, then put the nozzle in the ultrasonic cleaning tank cleaning, cleaning after being placed on the test stand test, through the comprehensive test to determine whether the nozzle nozzle available, in addition to the conventional sealing, spray shape, flow testing, should also test the nozzle on jet engine speed variation of the responding ability and speed of all kinds, such as acceleration, jerk Deceleration Test after passing, can the loading.
Take a bottle of carburetor cleaning agent, to find a small bottle, the carburetor cleaning agent is sprayed on the bottle, then put into the oil mouth cleaning agent inside the cap into the nozzle end, filled, the nozzle exterior for cloth, and then sealed with transparent tape upper oil inlet, to prevent the cleaning agent evaporation then, the nozzle inlet, placed on the night, second days, the nozzle mounted to the electronic test instrument can carry out repair work. Spray cleaning tester of many types, including a domestic ANLI-2000 (safety signs) machine is very good, this machine on proprietary file was used to repair the nozzle. The boot after the election to ninth gear, machine nozzle wire inserted in the nozzle, press the start button, the machine will send to the nozzle driving pulse, then can get a screwdriver with wooden handle, one end of the central tap nozzle, nozzle can be recovered action, then put the nozzle in the ultrasonic cleaning tank cleaning, cleaning after being placed on the test stand test, through the comprehensive test to determine whether the nozzle nozzle available, in addition to the conventional sealing, spray shape, flow testing, should also test the nozzle on jet engine speed variation of the responding ability and speed of all kinds, such as acceleration, jerk Deceleration Test after passing, can the loading.