Patent ID: 8663061
Filing Date: 2014-03-04
Classification: B60K,B60W,F16H,Y02T,Y10T

Abstract:
1. A gear shifting method of a hybrid vehicle, comprising: determining that a shift is necessary; releasing a first clutch, a second clutch, a first brake, and a second brake of a transmission and determining whether or not a neutral condition is met; controlling torque of an engine connected to one operational element of a first planetary gear set in the neutral condition; and controlling speed of a first motor/generator connected to another operational element of the first planetary gear set, and a second motor/generator, completing the shift, wherein the first planetary gear set includes: wherein the second planetary gear set includes: wherein the first clutch is selectively operated to engage the first ring gear and the first carrier; wherein the second clutch is selectively operated to engage the first carrier and the second ring gear; wherein the first brake selectively fixes the first ring gear; and wherein the second brake selectively fixes the second ring gear.