| 摘要 |
<p>A hybrid transmission with fixed shift gears that uses an engine and two electric motor/generator together, more specifically, a hybrid transmission that uses a planetary gear device combining a double planetary gear, two sun gears, and one ring gear as a power splitting device, is provided to let drive at a mechanical power conveying mode in a driving environment that exceeds usual driving conditions such as a long-distance steep slope climbing driving or rapid acceleration, to maintain the capacity of the motor/generator used as an auxiliary driving power since the increase of output of an auxiliary driving power motor is unnecessary, to make the capacity of battery small, to enable to drive even if there is a malfunction in an electric power device such as a motor, and especially to enable to perform climbing driving with the smallest strain on a steep slope even the electric power stored in the battery is all consumed, by implementing especially a fixed shift ratio of three levels as a mechanical power conveying mode.</p> |
