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Ignition module with low speed control

A controller and ignition system technology, which is applied to the ignition energy generated by the generator, the starting device with a manual crank, the ignition controller, etc., which can solve the problem that the microprocessor cannot be fully powered, the engine cannot be started, and the high starting speed And other issues

Active Publication Date: 2019-11-08
WALBRO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At low engine cranking speeds during an attempt to start the engine, the microprocessor may not be powered sufficiently so that it can control the ignition event and the engine may fail to start, or have difficulty starting at lower cranking speeds, requiring a relatively high cranking speed for starting

Method used

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  • Ignition module with low speed control
  • Ignition module with low speed control
  • Ignition module with low speed control

Examples

Experimental program
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Embodiment Construction

[0021] Referring to the accompanying drawings in more detail, figure 1 One example of a hand-held power tool or product is shown in the form of a chainsaw 10 powered by a small or lightweight internal combustion engine 12 . Typically the engine is a single cylinder two-stroke or four-stroke gasoline powered internal combustion engine, however engines with more than one cylinder may be used. Typically, the engine 12 has an ignition module 14 that provides a high voltage ignition pulse to a spark plug for igniting the air and fuel mixture in the engine cylinder; for example, the ignition module 14 can be varied and controlled in response to changing engine operating conditions. ignition timing.

[0022] Typically, the engine 12 does not have any batteries that supply current to the spark plugs or power the ignition module 14 . Engine 12 may be manually cranked, such as by recoiling a rope starter. The term "light duty internal combustion engine" broadly includes all types of ...

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PUM

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Abstract

In at least some implementations, an ignition system for a combustion engine includes analog circuit components arranged to control ignition events at an engine speed below a first threshold of enginespeed and a microprocessor to control ignition events at engine speeds higher than the first threshold. Hence, ignition can be controlled at lower engine cranking speeds to facilitate starting the engine at lower engine rotational speeds.

Description

[0001] References to related applications [0002] This application claims the benefit of U.S. Provisional Application Serial No. 62 / 474,143, filed March 21, 2017, which is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure generally relates to capacitive discharge ignition systems. Background technique [0004] Capacitor discharge ignition (CDI) systems are sometimes used with small engines, including light duty internal combustion engines, such as those used in lawn, garden, and other outdoor equipment. Many such systems include a microprocessor that controls the timing of the ignition events, but do not include a battery that provides power to either the ignition system or the microprocessor. At low engine cranking speeds during an attempt to start the engine, the microprocessor may not be powered sufficiently so that it can control the ignition event and the engine may fail to start, or have difficulty starting at lower cra...

Claims

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Application Information

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IPC IPC(8): F02P9/00F02P3/08F02B63/02
CPCF02B63/02F02N3/02F02N2250/02F02P1/086F02P5/1558Y02T10/40F02P9/00
Inventor M.N.安德森C.M.希利R.L.林顿
Owner WALBRO LLC