KR970075340A - Control method of ignition timing to prevent knocking during rapid acceleration - Google Patents

Abstract

(purpose)

The present invention relates to an ignition timing control method for preventing knocking during rapid acceleration. The present invention relates to an electronic spark control (ESA) for advancing an ignition timing according to an increase in engine load due to acceleration. When a predetermined rapid acceleration state is reached, the ignition timing is delayed according to the engine load for a predetermined time, and the ignition timing is prevented from being advanced too much to prevent self ignition, thereby preventing knocking caused by self ignition. It is for.

(Configuration)

The present invention provides a throttle position sensor (1) for detecting the opening amount of the throttle valve, a crank angle sensor (5) for detecting the crank angle, an air flow detection sensor (3) for detecting the amount of intake air flowing into the engine, The engine speed N is calculated from the crank angle signal input from the crank angle sensor 5, and the intake air amount Q per engine is calculated from the intake air amount signal input from the air flow detection sensor 3. In the normal driving with the throttle valve open, select the basic ignition advance value A2 according to the engine speed N and the intake air quantity Q among the ignition advance data stored in the memory. An ignition timing controller configured to include an ignition timing control section 6 that selects a correction ignition advance value A3 to advance or perceive and calculates an actual ignition timing A by the sum of the basic ignition advance value and the correction ignition advance value. In the method of controlling the ignition timing through the device, when the change amount (ΔTVO) of the opening amount of the throttle valve per unit time is larger than the predetermined change amount (0.0195) which is a sudden acceleration state that may cause self-ignition (ΔTVO> 0.0195) Determining the acceleration state step (S10) and; When it is determined that the acceleration state in the acceleration state determining step (S10), the current intake air amount (Q) and the engine among the acceleration correction perception value stored in the memory at a predetermined time (180 ℃ CA) interval for a predetermined time (1260 ℃ CA) Selecting the acceleration correction perception value (A3 ') corresponding to the rotation speed (N) and including it in the correction ignition advance value (A3) to perform the acceleration perception correction step (S30) for calculating the actual ignition timing (A). It features.

Description

Control method of ignition timing to prevent knocking during rapid acceleration

As this is a public information case, the full text was not included.

1 is a block diagram showing the configuration of a general ignition timing control device, Figure 3 is a flow chart showing a ignition timing control method for preventing knocking when the present invention accelerates.

Claims (3)

A throttle position sensor for detecting the opening amount of the throttle valve, an engine speed detection sensor for detecting the engine speed, an air flow detection sensor for detecting the amount of intake air flowing into the engine, and a memory for normal driving with the throttle valve open The basic ignition progression value and the correction ignition value are selected by selecting a basic ignition progression value according to the intake air amount and engine rotation speed among pre-stored ignition progression data, and selecting a compensation ignition progression value that advances or perceives the ignition timing according to the engine operating state. An ignition timing control method comprising an ignition timing controller configured to include an ignition timing controller that calculates an actual ignition timing based on a sum of advance values, the current acceleration being detected by detecting an acceleration state according to a change amount of the opening amount of a throttle valve per unit time. When the state reaches the sudden acceleration state, which is an acceleration state that may cause self ignition, Since the acceleration compensation perception value is selected from the acceleration compensation perception values stored in the memory according to the intake air amount and the engine speed, the acceleration perception compensation is performed to calculate the actual ignition timing by including the selected acceleration compensation perception value in the compensation ignition advance value. Ignition timing control method for preventing knocking during rapid acceleration, characterized in that the actual ignition timing is perceived to prevent self ignition during the acceleration and thereby knocking. The method of claim 1, wherein the acceleration perception correction is performed only when the current engine load, which is the ratio of the intake air amount and the engine speed, is smaller than or equal to the predetermined engine load when the current acceleration state is a rapid acceleration state. An ignition timing control method for preventing knocking during sudden acceleration, wherein the ignition timing is prevented by the acceleration perception compensation. The method of claim 1, wherein the acceleration perception compensation is performed only when the coolant temperature input from the coolant temperature detection sensor that detects the temperature of the engine coolant is higher than or equal to a predetermined temperature. . ※ Note: The disclosure is based on the initial application.