JPH0471772U

JPH0471772U -

Info

Publication number: JPH0471772U
Application number: JP11423690U
Authority: JP
Priority date: 1990-10-31
Filing date: 1990-10-31
Publication date: 1992-06-25

Description

[Brief explanation of drawings]

第１図は本考案の実施例に係る点火時期制御系
のブロツク図、第２図は遅角補正量のマツプを示
す図、第３図は加速時の点火時期遅角補正の動作
状態を示すタイムチヤートの図である。１０……制御ユニツト、１２……基本点火時期
設定部、１３……加速検出部、１４……エンジン
回転数変化量算出部、１５……変化点検出部、１
６……回転数差算出部、１７……遅角補正量決定
部、１８……点火時期算出部。 Fig. 1 is a block diagram of an ignition timing control system according to an embodiment of the present invention, Fig. 2 is a diagram showing a map of the amount of retardation correction, and Fig. 3 shows the operating state of ignition timing retardation correction during acceleration. It is a diagram of a time chart. 10... Control unit, 12... Basic ignition timing setting section, 13... Acceleration detection section, 14... Engine speed change amount calculation section, 15... Change point detection section, 1
6... Rotation speed difference calculation section, 17... Retard angle correction amount determination section, 18... Ignition timing calculation section.

Claims

[Scope of Claim for Utility Model Registration] In an ignition timing control system that retards the basic ignition timing during acceleration, means for calculating the amount of change in engine rotation speed that calculates the amount of change in the fluctuation cycle of the engine drive system during acceleration;
A change point detection means detects the peak point and valley point of the fluctuation cycle from the amount of change, a retard correction amount determining means calculates the retard correction amount from the above change amount, and An ignition timing control device comprising: a correction timing determining unit that determines a correction timing that matches the peak portion; and an ignition timing calculating unit that generates and outputs a correction signal based on the retardation correction amount and the correction timing.