CONTROL DEVICE

• Main Authors: OZAKI TAKAHIRO, TANAKA KENJI, OZAWA IKUO
• Format: Patent
• Language: English
• Published: 30.04.2010
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To reduce a computation error of an amount of fresh air and an amount of EGR gas flowing in a cylinder when controlling an internal combustion engine and an exhaust gas recirculation device affixed to the same. SOLUTION: At a time point of calculating an air amount before intake valve closing timing, when calculating the partial pressure of the fresh air and the partial pressure of the EGR gas at the intake valve closing timing, an actual opening degree of an EGR valve at the intake valve closing timing is estimated based on an EGR valve opening degree at the calculation time point, a time difference from the calculation time pint to the intake valve closing timing and a valve opening speed or a valve closing speed of the EGR valve. Namely, the opening degree is estimated as estimated opening degree=actual opening degree+(time difference×opening or closing speed). COPYRIGHT: (C)2010,JPO&INPIT