公开(公告)号：US20160244039A1

公开(公告)日：2016-08-25

申请号：US14795252

申请日：2015-07-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Michael D. Rizzo ,  James S. Creehan ,  Paul S. Shaub ,  W. Marc Modisett ,  Mark C. Kohls

IPC: B60T8/32 ,  B60T7/12

CPC classification number: B60T8/322 ,  B60K31/00 ,  B60T7/12 ,  B60T8/1769 ,  B60T2201/06

Abstract: A vehicle includes an engine, an accelerator pedal, transmission, transfer case, mode selection device, road wheels, an electronic brake assembly, and a controller. The transfer case is connected to the transmission, and is operable for establishing a predetermined transfer case mode. The mode selection device receives a requested crawl mode of the vehicle in the predetermined transfer case mode. The electronic brake assembly has a brake motor and brake calipers, with each brake caliper disposed proximate a respective wheel to brake the respective road wheel. The controller is programmed to simulate a four-wheel drive-low mode of the transfer case in response to the requested crawl mode by decelerating the vehicle via control of the brake assembly and limiting a gear state of the transmission to 1st or 2nd gear. An auto-hold state may be engaged in crawl mode when the vehicle stops to prevent rolling of the vehicle.

Abstract translation: 车辆包括发动机，加速器踏板，变速器，分动箱，模式选择装置，车轮，电子制动组件和控制器。 传送箱连接到传输，并且可操作用于建立预定的传送箱模式。 模式选择装置以预定的传送箱模式接收车辆的所请求的爬行模式。 电子制动器组件具有制动马达和制动卡钳，每个制动钳布置在相应的车轮附近，以制动相应的车轮。 控制器被编程为通过控制制动器组件来减速车辆，并且将变速器的档位状态限制在1档或2档，来响应于所请求的爬行模式来模拟传送箱的四轮驱动低模式。 当车辆停止以防止车辆的滚动时，自动保持状态可以进行爬行模式。

公开(公告)号：US20220169237A1

公开(公告)日：2022-06-02

申请号：US17109342

申请日：2020-12-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yiran Hu ,  Brent S. Gagas ,  Kee Y. Kim ,  James S. Creehan ,  Brian A. Welchko ,  Patrick E. Frost

IPC: B60W20/15 ,  B60K1/00 ,  B60L15/20 ,  B60K26/02 ,  B60K1/04 ,  B60W30/182

Abstract: A method controls an electrified powertrain having an electric traction motor and a traction power inverter module (TPIM). A controller determines a current component capability and use case of the electrified powertrain. In response to the current component capability being less than a capability threshold and the use case matching a predetermined approved use case, the controller determines whether a predetermined margin exists in the component capability for operating the electrified powertrain in a maximum performance mode (MPM) for a full duration of a boosted driving maneuver. When the predetermined margin exists, the controller temporarily applies an extended inverter limit (EIL) of the TPIM to enable the MPM. The EIL allows operation of the traction motor to occur above default torque and speed operating limits for the full duration of the boosted driving maneuver. MPM/EIL availability is communicated to the operator.