Unlock instant, AI-driven research and patent intelligence for your innovation.

Multiplexing drive circuit for an AC ignition system

一种点火系统、驱动电路的技术，应用在点火系统领域，能够解决可靠性变低、发生故障、AC点火系统构造成本变高等问题

Inactive Publication Date: 2012-10-03
WOODWARD GOVERNOR CO
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

AC ignition systems are more expensive to construct and less reliable due to additional components and increased complexity leading to more potential failures
Additionally, many AC ignition systems do not allow precise real-time control of the secondary coil current that determines the characteristics of the spark discharge

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multiplexing drive circuit for an AC ignition system
  • Multiplexing drive circuit for an AC ignition system
  • Multiplexing drive circuit for an AC ignition system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] figure 1 An exemplary alternating current (AC) ignition system module 100 is shown having a multiplexed drive circuit 101 in accordance with an embodiment of the present invention. The ignition system module 100 may be configured as a 3-channel module, that is, coupled to three spark plugs, or as a two-channel module, that is, coupled to two spark plugs, the ignition system module including a shared or common branch line 102, The branch 102 has two switches S2, 104 and S3, 106 coupled in series. The first dedicated branch 108 has two switches S4, 110 and S5, 112 coupled in series. One terminal 103 of a primary winding 114 of a first ignition coil or transformer 116 is coupled between S2, 104 and S3, 106 and the other terminal 105 of the primary winding 114 is coupled between S4, 110 and S5, 112. The secondary winding 118 of the first transformer 116 is coupled in parallel with the first spark plug 120 . Because the ignition coil of the present invention does not have...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
resonance frequencyaaaaaaaaaa
resonance frequencyaaaaaaaaaa
Login to View More

Abstract

A multiplexing drive circuit for an AC ignition system having a common leg that includes two switches coupled in series, and one or more dedicated legs, wherein each leg includes two switches coupled in series. The multiplexing drive circuit also includes a transformer for each of the one or more dedicated legs, each transformer having a primary winding coupled between one of the one or more dedicated legs and the common leg, and wherein each transformer has a secondary winding coupled in parallel to a spark plug, and a pulse-width modulated (PWM) switch controller configured to operate the common leg and dedicated leg switches to control characteristics of the spark discharge for the spark plug.

Description

technical field [0001] The present invention relates generally to ignition systems for internal combustion engines, and more particularly to ignition systems for internal combustion engines using spark plugs. Background technique [0002] Typically, an internal combustion engine includes a spark plug and a spark generating ignition circuit to ignite the air-fuel mixture within the engine cylinders. Some motors employ permanent magnets attached to a spinning flywheel to generate a voltage across a charging coil. In a typical capacitive discharge system, power from a low voltage battery is fed to a power source which steps it up to a higher voltage on a capacitor which provides the voltage needed to cause an electric spark across the spark gap of the spark plug . The capacitor transfers its energy to the primary winding of the ignition coil and to the magnetic core of the ignition coil. Energy is extracted from the ignition coil secondary winding until the capacitors and co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F02P3/04H01F38/12F02P3/02
CPCF02P3/01F02P15/02
Inventor D·C·彼特鲁斯卡
Owner WOODWARD GOVERNOR CO