A control system, an ignition system, and an ignition charging control method

A control system and ignition coil technology, applied in the direction of induction energy storage devices, etc., can solve the problem of inaccurate charging time of the ignition coil

Active Publication Date: 2022-06-24
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a control system, an ignition system and an ignition charging control method to solve the problem that the charging time of the existing ignition coil is not accurate enough

Method used

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  • A control system, an ignition system, and an ignition charging control method
  • A control system, an ignition system, and an ignition charging control method
  • A control system, an ignition system, and an ignition charging control method

Examples

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Effect test

Embodiment 1

[0059] Please refer to image 3 , an embodiment of the present invention provides a control system 1 for controlling the charging of an ignition coil, the control system 1 includes: a micro-control unit 11 , a driver-level switch 12 , a detection resistor 13 and a comparison unit 14 that are connected in sequence to form a control loop . Optionally, the number of the control loops is n, the n control loops include n the driving stage switches 12, the n control loops share the micro-control unit 11, and n is a natural number, For example, n can be 1, 2, 4, 6, or 8, etc. The embodiment of the present invention is described for the case where n is equal to 1; The detection resistor 13 and a comparison unit 14 form a detection circuit.

[0060] The comparison unit 14 is used to compare the voltage across the detection resistor 13 with a reference voltage Vref, and output a signal representing the charging current level of the ignition coil to the micro-control unit 11 according ...

Embodiment 2

[0078] The difference from the first embodiment is that in the embodiment of the present invention, the control loop is connected to the primary of the ignition coil 3 through the detection resistor 13, such as Figure 5 As shown, the gate of the IGBT of the driving stage switch 12 is connected to the pre-drive circuit 15 , the collector is connected to one end of the detection resistor 13 , and the emitter is grounded.

[0079] In addition, compared with the first embodiment, the control system 1 of the embodiment of the present invention must include a differential operational amplifier 16 to make a difference between the voltages across the detection resistor 13 and then amplify and input the voltage to the comparison unit 14, and the embodiment of the present invention needs to be in all An additional protection circuit (protection circuit) is added to the input of the differential operational amplifier 16 Figure 5 not shown) to keep the control loop from being damaged in...

Embodiment 3

[0081] The difference from the second embodiment is that in the embodiment of the present invention, the ignition coil 3 is primarily located between the detection resistor 13 in the control system 1 and the driving stage switch IGBT 12 , and the detection resistor 13 is connected to the The connecting end of the comparison unit 14 in the control system 1 is also connected to the battery 2 . Please refer to the specific connection relationship. Image 6 . Since the collector of the IGBT is directly connected to the primary of the ignition coil in the implementation of the present invention, there is no need to add an additional protection circuit, but two additional wires need to be introduced from outside the control system to be connected to both ends of the detection resistor 13 to detect all the the voltage across the detection resistor 13.

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PUM

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Abstract

The present invention provides a control system, an ignition system and an ignition charging control method. The ignition system includes the control system, a battery, an ignition coil, and a spark plug. The control system includes: a micro-control unit, a driving stage switch, a detection resistor, and A comparison unit, the comparison unit outputs a signal representing the charging current level to the micro control unit by comparing the voltage at both ends of the detection resistor with a reference voltage, and the micro control unit processes the signal to adjust the The charging time of the ignition coil makes the charging time of the ignition coil more accurate, thereby avoiding the fact that the actual charging time is too long and the charging current is too large to damage the driver switch or the ignition coil, and the actual charging time is too short to cause the charging current to be too small to cause damage to the ignition coil. resulting in insufficient ignition energy.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a control system, an ignition system and an ignition charging control method. Background technique [0002] The ignition system of modern automobile engine mainly includes: battery, electronic controller (ECU), drive stage switch, ignition coil and spark plug. The ECU collects the sensor signals installed in different parts of the engine and the vehicle, and selects the appropriate ignition energy to ignite the engine at the best time according to the operating conditions of the engine. The working principle of ignition is as follows: the MCU in the ECU outputs the control signal to drive the switch of the driver stage, so that the battery charges the ignition coil. After charging, the switch of the ignition driver stage is turned off to realize ignition. There are two ignition methods: external drive ignition and internal drive ignition. The former driver stage switc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P3/05
CPCF02P3/05
Inventor 鲜志刚
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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