FUEL INJECTION CONTROL DEVICE

• Main Authors: KOJIMA AKIKAZU, MORIMOTO YOHEI
• Format: Patent
• Language: English
• Published: 15.04.2010
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

PROBLEM TO BE SOLVED: To provide a fuel injection control device capable of improving responsiveness of combustion timing control as much as possible while maintaining a stable state of an inside of a combustion timing control system. SOLUTION: The fuel injection control device detects the combustion timing inside a cylinder from an output signal of a cylinder internal pressure sensor (S300), and calculates target combustion timing based on an engine speed and an accelerator opening (S302). The fuel injection control device stores a correlation between physical quantity and a feedback gain as a correlation map based on a correlation between physical quantity of exhaust O2concentration or EGR rate and combustion timing sensibility that the combustion timing changes in accordance with the change of the injection timing and a correlation between the combustion timing sensibility and the feedback gain of combustion timing control. The fuel injection control device acquires the feedback gain from the correlation map (S306) based on the detected physical quantity (S304), calculates instruction injection timing from the feedback gain (S308), and instructs an injector (S310). COPYRIGHT: (C)2010,JPO&INPIT