Miss-fire fault generating method and device for electric spraying engine of great-current ignition system
A fault occurrence and ignition system technology, applied in the direction of engine ignition, engine components, machines/engines, etc., can solve the problems of the system being susceptible to interference, single misfire mode, etc., and achieve the effect of easy development and verification
Active Publication Date: 2011-02-09
武汉理工大学教育发展基金会
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[0005] The published invention patent application titled "Method and Device for Misfire Failure of Electronically Controlled Gasoline Injection Engine" (patent application number: 200710051384. The misfire mode is single, and the original ignition system has been modified, which makes the system vulnerable to interference, etc.
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[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples, but these examples should not be construed as limiting the present invention.
[0020] image 3 What is shown is one signal processing circuit and one misfire driving circuit of the fire failure device. This device has 8 identical signal processing circuits and 8 identical misfire driving circuits in total (see figure 1 ),Thus, in image 3 Only one path is listed in . figure 2 Shown is the typical application of the misfire failure device on the high-current shared ignition system EFI engine. image 3 The middle Ignition point is connected between the ECU and the ignition coil. After the voltage division of the resistor R4 and the filtering of the resistor R5 and the capacitor C1, it is connected to the pin 6 of U1. After the shaping of U1, its pin 3 outputs the standard square wave pulse. The potential of Ignition point and Ignition1 point ch...
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The invention relates to a heavy current ignition system electronic injection engine fire fault generation method and a device thereof. The method is characterized in that the method comprises the following steps: leading out an ignition signal between an electronic injection engine ignition coil and an ECU; coupling the led-out ignition signal into a fire fault generating device; obtaining a standard square wave impulse signal after the filtration, shaping and photoelectric separation treatment of the ignition signal through the fire fault generating device; making use of the first jump of the processed ignition impulse signal for the counting and fire control through the fire fault generating device; and according to the preset fire mode, fire pattern, fire rate and fire cylinder, controlling the ignition signal, sending a fire control signal to drive the fire drive and shield the ignition signal of a primary ignition coil, consequently making the primary ignition coil be unable to be charged and further be unable to produce a high voltage, making a spark plug be unable to be ignited normally, and consequently making the engine have a fire fault. The heavy current ignition system electronic injection engine fire fault generation method facilitates the development, verification and study of an OBD system.
Description
technical field [0001] The invention belongs to a test instrument for an electric injection engine, in particular to a method and device for generating a fire failure of an electronic injection engine in a large current ignition system. Background technique [0002] The OBD system in the EFI engine detects the misfire status of the electronically controlled gasoline injection engine (hereinafter referred to as the EFI engine). Once the misfire rate of the EFI engine is found to be too high, the OBD system will alarm. [0003] In the following three situations, it is necessary to cause the engine to have a misfire failure: 1) When developing an OBD system with a misfire detection function, it is necessary for the engine to have a misfire failure phenomenon. 2) When verifying whether the OBD system of a new car or an in-use car is effective in detecting engine misfire faults, it is also necessary to cause the engine to generate quantitative misfire faults. 3) The phenomenon o...
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IPC IPC(8): G01M15/11F02P17/12
Inventor 颜伏伍胡杰邹斌王攀杨虎
Owner 武汉理工大学教育发展基金会