JPH0176567U

JPH0176567U -

Info

Publication number: JPH0176567U
Application number: JP1987171198U
Authority: JP
Priority date: 1987-11-09
Filing date: 1987-11-09
Publication date: 1989-05-24

Description

[Brief explanation of the drawing]

第１図は本考案のクレーム対応図、第２図は本
考案の一実施例の制御系のブロツク図、第３図は
この実施例の演算内容を説明する流れ図、第４図
と第５図はそれぞれ補正量△１１と△１２の内容
を示す特性図、第６図と第７図はそれぞれ負荷と
回転数に対する最適点火時期を示す特性図である
。１……エンジン負荷検出センサ、２……エンジ
ン回転数検出センサ、３……基本点火時期算出手
段、４……混合割合検出センサ、５……点火時期
補正量算出手段、６……燃焼状態検出センサ、７
……フイードバツク補正量算出手段、８……最終
点火時期設定手段、９……点火装置、１１……ク
ランク角センサ、１２……負荷センサ、１４……
筒内圧センサ、１７……燃料センサ、２１……コ
ントロールユニツト。 Fig. 1 is a diagram corresponding to claims of the present invention, Fig. 2 is a block diagram of a control system of an embodiment of the invention, Fig. 3 is a flowchart explaining the calculation contents of this embodiment, and Figs. 4 and 5. are characteristic diagrams showing the contents of the correction amounts Δ11 and Δ12, respectively, and FIGS. 6 and 7 are characteristic diagrams showing the optimum ignition timing with respect to the load and rotation speed, respectively. 1...Engine load detection sensor, 2...Engine speed detection sensor, 3...Basic ignition timing calculation means, 4...Mixture ratio detection sensor, 5...Ignition timing correction amount calculation means, 6...Combustion state detection sensor, 7
... Feedback correction amount calculation means, 8 ... Final ignition timing setting means, 9 ... Ignition device, 11 ... Crank angle sensor, 12 ... Load sensor, 14 ...
Cylinder pressure sensor, 17... fuel sensor, 21... control unit.

Claims

[Scope of utility model registration request]

A means for calculating basic ignition timing for a specific fuel according to operating conditions, a sensor for detecting a mixing ratio of different fuels with the specific fuel, and a means for calculating an ignition timing correction amount according to the detected mixing ratio. and,
A sensor for detecting the combustion state of the engine, a means for calculating a feedback correction amount for the ignition timing according to the detected combustion state, and a means for correcting the basic ignition timing using the two correction amounts to determine the final ignition timing. 1. An ignition timing control device for an engine, comprising: a means for setting the ignition timing; and a device for igniting the ignition timing at the set ignition timing.