Patent ID: 9014890
Filing Date: 2015-04-21
Classification: B60K,B60W,Y02T

Abstract:
1. A control method of a hybrid vehicle including a first planetary gear set having a first sun gear, a first planetary gear, a first ring gear, and a first carrier, a second planetary gear set having a second sun gear, a second planetary gear, a second ring gear, and a second carrier, an engine directly connected to the first carrier, a first motor-generator configured to rotate the first ring gear, a second motor-generator directly connected to the second sun gear and configured to rotate the second sun gear and the first sun gear, a first brake configured to brake the first ring gear, a second brake configured to brake the second ring gear, a first clutch configured to selectively connect the first ring gear with the first, and a second clutch configured to selectively connect the first carrier with the second ring gear, the control method comprising: confirming, by a controller, that the first and second brake and the first and second clutch are released and in neutral condition; confirming, by the controller, that the engine is stopped; and operating, by the controller, the first motor-generator and the second motor-generator to induce the engine to rotate at a predetermined rotational speed to start the engine, wherein the engine is directly connected to the first carrier through an output shaft of the engine, and wherein the first motor-generator is directly connected to the first ring gear; wherein the rotational speed of the second motor-generator is controlled and calculated by a below formula 6: wherein, ω