Hyundai Motor Company

Kia Motors Corporation

Hyundai Motor Japan R&d Center, Inc.

Teruyoshi Egoshi

A method of controlling a hybrid vehicle with an engine, a battery, and at least one motor generator. System efficiencies of each of several candidate driving states are calculated. Calculating efficiency when the battery is discharged uses power of the engine P, power drawn from the battery P, and required driving power P. Calculating efficiency when the battery is charged uses P, P, and power charged to the battery P. Pis calculated using a real battery discharge power P, a battery discharge energy efficiency &#x3b7;, a historic efficiency &#x3b7;of energy loss when the battery is charged, and a correction coefficient SOCfor controlling the battery charge amount. Pis calculated using real battery charge power P, battery charge energy efficiency &#x3b7;, &#x3b7;, and efficiency &#x3b7;when power is consumed in the future. The driving state with the highest efficiency is then selected.

Method of controlling hybrid vehicle

A method of controlling a hybrid vehicle that is driven by at least one of an engine and a motor generator, the motor generator exchanging power with a battery. The method includes determining whether the vehicle is accelerating, decelerating, or traveling at a constant speed; selecting a range of a state of charge of the battery based on whether the vehicle is accelerating, decelerating, or traveling at a constant speed; and controlling at least one of: torque and number of rotations of the engine and the motor generator, such that the power being exchanged between the battery and the motor generator is such that the state of charge is within the selected range.

Growing community of inventors

Inzai, Japan

Teruyoshi Egoshi