Control for an internal-combustion engine

• Main Authors: KOMORIYA ISAO, IRIE SEIICHIRO, KOUDA YUTAKA, TAKAMIYA HIDEHARU
• Format: Patent
• Language: English
• Published: 21.09.2010
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BLASTING; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; CALCULATING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMPUTING; CONTROLLING; CONTROLLING COMBUSTION ENGINES; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; 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; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL; WEAPONS

A control for an engine having a variable valve actuation mechanism is provided. A map indicating a correlation among a rotational speed, a gauge pressure of an intake manifold, a lift amount of an intake valve, a phase of the intake valve and an intake air amount of the engine under a reference condition of a predetermined reference atmospheric pressure and a predetermined reference intake air temperature is defined. An intake air amount for the reference condition is determined as a reference intake air amount by referring to the map based on a current rotational speed, a current gauge pressure, a current lift amount and a current phase. The reference intake air amount is corrected with a ratio between an air density under a current condition of a current atmospheric pressure, a current intake air temperature and a current gauge pressure and an air density under the reference condition to calculate an intake air amount for the current condition.