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Ignition control method and system for a twin-cylinder engine

A technology of ignition control and engine, applied in the direction of automatic control, automatic control, electrical automatic control, etc., can solve problems such as additional cost increase

Inactive Publication Date: 2022-01-07
星科动力有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a phase sensor can realize cylinder judgment, but it will bring additional cost

Method used

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  • Ignition control method and system for a twin-cylinder engine
  • Ignition control method and system for a twin-cylinder engine
  • Ignition control method and system for a twin-cylinder engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A two-cylinder engine includes a first cylinder (denoted as cylinder 1) and a second cylinder (denoted as cylinder 2), such as image 3 As shown, the ignition control method of the twin-cylinder engine in this embodiment includes the following steps:

[0040] Step 1: Perform random ignition on cylinder 1 and cylinder 2 respectively;

[0041] Step 2: Cylinder 1 is set to sequential ignition, and a certain slope is adopted to delay the timing of disordered ignition of cylinder 2;

[0042] Step 3: Determine whether the working stroke of cylinder 1 is smaller than the working stroke of cylinder 2, and the state can be stably maintained at the preset first time interval;

[0043] Since the ignition angle (that is, the angle that the crankshaft rotates during the period from the ignition moment to the piston reaching the compression top dead center) can increase the speed (that is, increase the ignition angle), the speed can be increased, and the ignition angle can be delaye...

Embodiment 2

[0047] Such as Figure 4 As shown, the ignition control method of the twin-cylinder engine in the present embodiment includes the following steps:

[0048] Step 1: Perform random ignition on cylinder 1 and cylinder 2 respectively;

[0049] Step 2: Cylinder 1 is set to sequential ignition, and a certain slope is adopted to delay the timing of disordered ignition of cylinder 2;

[0050] Step 3: Determine whether the working stroke of cylinder 1 is smaller than the working stroke of cylinder 2, and the state can be stably maintained at the preset first time interval;

[0051] Step 4: If the judgment in step 3 is yes, the cylinder 2 is changed to sequential ignition.

[0052] Based on the above results, you can also do the following test as a reconfirmation: Change the ignition of cylinder 2 to sequential ignition, check whether the state of cylinder 1 running fast and cylinder 2 running slowly still exists, if it can continue for a period of time, it means that the previous Th...

Embodiment 3

[0056] Such as Figure 5 As shown, the ignition control method of the twin-cylinder engine in the present embodiment includes the following steps:

[0057] Step 1: Perform random ignition on cylinder 1 and cylinder 2 respectively;

[0058] Step 2: Cylinder 1 is set to sequential ignition, and a certain slope is adopted to delay the timing of disordered ignition of cylinder 2;

[0059] Step 3: Determine whether the working stroke of cylinder 1 is smaller than the working stroke of cylinder 2, and the state can be stably maintained at the preset first time interval;

[0060] Step 4: If the judgment in step 3 is yes, the cylinder 2 is changed to sequential ignition.

[0061] However, despite delaying the ignition timing of cylinder 2, it is still possible that cylinder 1 still runs longer per revolution than cylinder 2, which may be caused by cylinder 1 misfiring or other unknown reasons. Therefore, step 3 will be judged as no. In this case, if cylinder 2 is switched from diso...

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Abstract

The invention discloses an ignition control method and system for a twin-cylinder engine. Firstly, the first cylinder is sequentially ignited, and the time of disordered ignition of the second cylinder is delayed, and then it is judged whether the work time of the first cylinder is shorter than that of the second cylinder, and the maintenance is maintained. This state reaches the first time interval; it is judged whether the first cylinder is in the ignition TDC position based on the relationship between the working time of the first cylinder and the second cylinder. The ignition control method of the two-cylinder engine of the present invention can be implemented by programming on the vehicle controller, and compared with the traditional technology of judging based on the intake pressure signal, no additional cost will be added.

Description

technical field [0001] The invention relates to engine ignition control technology, in particular to an ignition control method and device for a two-cylinder engine. Background technique [0002] When the engine is working, it is necessary to judge the cylinder to accurately determine the ignition timing. The ignition timing is related to the ignition TDC position (Top Dead Center, the top dead center of the engine piston stroke) when the engine is running. At the end of the compression stroke of the engine and the piston reaches the top of the stroke, the ignition system provides high-pressure sparks to the spark plug to ignite the compressed mixture in the cylinder to do work. This time is the ignition timing. In order to maximize the ignition energy, the ignition timing is generally advanced by a certain amount, so the ignition is ignited at the moment when the piston is about to reach the ignition TDC position, rather than just when it reaches the ignition TDC position....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P5/15
CPCF02P5/15
Inventor 何德管
Owner 星科动力有限公司
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