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1. 发明申请

WO2017045711A1 A VEHICLE POWERTRAIN AND A METHOD FOR GEAR UPSHIFTING 审中-公开
标题翻译：一种车辆动力传动系统和一种用于齿轮起重的方法
公开(公告)号：WO2017045711A1
公开(公告)日：2017-03-23
申请号：PCT/EP2015/071243
申请日：2015-09-16
申请人： VOLVO TRUCK CORPORATION
发明人： FRIES, Johan , RYBERG, Henrik
IPC分类号： F16H61/04 , B60W30/19 , F16H61/21 , F16H63/46
CPC分类号： F16H61/0403 , B60W30/19 , F16H59/78 , F16H61/21 , F16H63/46 , F16H2061/1224 , F16H2306/54
摘要： The disclosure concerns a vehicle powertrain (10) comprising a propulsion unit (11) having a propulsion unit auxiliary brake (25), a transmission (20), driven wheels (4) and a control unit (40) arranged to control at least the transmission (20), where the propulsion unit (11) is drivingly connected to the driven wheels via a clutch (22) and different engagable gear ratios (32, 37, 34, 38) in the transmission. The control unit is arranged to perform the following steps when upshifting: -automatically disengage the clutch (22) in order to disengage the propulsion unit (11) from the transmission (20); -upshift the transmission to a new gear (34, 38) compared to current gear (32, 37); - initiate a synchronization in order to decrease and synchronize rotational speed of the propulsion unit to rotational speed of the new gear to be engaged; -if it is determined by the control unit that the synchronization cannot be performed by decreasing rotational speed of the propulsion unit by the control unit controlling the auxiliary brake to brake the rotational speed of the propulsion unit then, -automatically initiate a reengagement of the clutch in order to perform the synchronization. The disclosure also concerns a corresponding method, a computer program, a computer readable medium, and a control unit (40) for controlling the powertrain.
摘要翻译：本公开涉及一种车辆动力总成（10），其包括具有推进单元辅助制动器（25），变速器（20），从动轮（4）和控制单元（40）的推进单元（11），所述推进单元布置成至少控制变速器（20），其中所述推进单元（11）经由离合器（22）驱动地连接到所述从动轮，并且所述变速器中具有不同的可接合齿轮比（32,37,34,38）。控制单元布置成在升档时执行以下步骤： - 自动脱离离合器（22）以使推进单元（11）与变速器（20）脱离; 与当前的齿轮（32,37）相比，将变速器换档到新齿轮（34,38）; - 启动同步，以便将推进单元的转速降低并同步到待接合的新齿轮的转速; - 如果由控制单元确定通过控制辅助制动器的控制单元降低推进单元的转速来制动推进单元的转速，则不能执行同步，从而自动启动离合器的重新接合以便执行同步。本公开还涉及用于控制动力系的相应方法，计算机程序，计算机可读介质和控制单元（40）。

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