红旗488发动机电脑技术解析（Red flag 488 engine computer technology analysis）.docVIP

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红旗488发动机电脑技术解析（Red flag 488 engine computer technology analysis）.doc

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红旗488发动机电脑技术解析（Red flag 488 engine computer technology analysis）

红旗488发动机电脑技术解析（Red flag 488 engine computer technology analysis） Red flag 488 engine computer technology analysis Ignition circuit Ignition and related circuits, camshaft position signal sent by computer Pin44 to 74HC14Ds No. 5 foot, after the reverse phase, from 74HC14Ds No. 6 foot output to CPUs No. 36 feet. 33 feet CPU crankshaft position signal from the computer and sent to the 74HC14D pin Pin67 pin 10 output to CPU according to the camshaft and crankshaft position signal to the ignition time of judgment, and then by 71 feet output ignitionpulse No. 4 to 916741 feet, after amplified by the 916741 pin 11 output by computer the Pin7 pin to the ignition module. Note: 916741 damage will cause no ignition fault! Two 、 fuel injection circuit The injection circuit, CPU output by 1 feet, 2 feet, 3 feet, 5 feet four road fuel injection signal, were sent to 100904C No. 1, No. 3 feet, 13 feet, 15 feet, feet, the driver is controlled by the 100904C amplified 2 feet, 4 feet, No. 12, No. feet, No. 14 feet output by Pin48, Pin46, Pin2, Pin47 to the end of the 4 fuel injectors. The 5 foot of 100904C is the enable signal, the signal is sent by the CPU data bus D0, and the control signal is generated by the latch of 74HC377D. This signal causes the 100904C to start to enter the working state. The No. 9 foot of 100904C is connected with the reset signal of CPUs No. 10 foot, so as to avoid the wrong action of the injector during the power on reset. 100904Cs No. 7 foot, foot 11, and CPUs No. 21 foot, 61 feet connected to the fuel injection feedback signal. Note: 100904C damage can cause trouble such as no oil injection, frequent injection, lack of cylinder, etc.. Three 、 idle throttle control circuit The idle speed control part TLE5205-2 to complete the solar term door, solar term door position signal by computer pins Pin40 the resistor divider to CPU the A/D input pin 14, idle solar term door position signal by computer pins Pin28 the resistor divider to the input end of the A/D CP