Controlling of ignition timing of an internal combustion engine

• Main Author: YUYA MASAHIKO
• Format: Patent
• Language: English
• Published: 07.03.2002
• Edition: 7
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; LIGHTING; MECHANICAL ENGINEERING; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; WEAPONS

An ignition-timing controlling apparatus for an internal combustion controls a basic ignition timing during cranking of the engine so as to correctively shift the basic ignition timing toward a retard angle side when the number of times of ignitions occurring in the combustion chamber of the engine are detected to have reached a predetermined number of times after the start of cranking operation. The amount of corrective shifting of the basic ignition timing toward the retard angle side is set by the ignition-timing controlling apparatus, on the basis of a temperature rise in the combustion chamber that is estimated by the detection of the number of times of ignitions. The ignition practically conducted by the internal combustion engine during cranking of the engine is controlled so as to meet with the correctively shifted ignition timing to thereby prevent both a reduction in the developed torque due to an excessive advance of the basic ignition timing, and generation of reverse torque, and to enhance the cranking performance of the internal combustion engine.