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Systems and methods for controlling an engine start in a hybrid vehicle

A technology of engine starting and engine, which is applied to the arrangement of multiple prime movers of hybrid vehicles and general power plants, and the starting of engines, etc., and can solve the problems of reducing the acceleration ability, etc.

Active Publication Date: 2018-09-07
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The torque used to accomplish this type of shift before the engine has been connected to the driveline can reduce the acceleration of a vehicle being propelled by the electric motor

Method used

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  • Systems and methods for controlling an engine start in a hybrid vehicle
  • Systems and methods for controlling an engine start in a hybrid vehicle
  • Systems and methods for controlling an engine start in a hybrid vehicle

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Embodiment Construction

[0026] The following description relates to systems and methods for controlling a dual clutch transmission during a rolling hybrid engine start event. Figure 1A-Figure 3 An example hybrid vehicle system is shown including a driveline having a motor, an integrated starter / generator, a dual clutch transmission, and an electric machine positioned downstream of the dual clutch transmission. For example, it is understood herein that downstream of a dual clutch transmission is relative to positive torque flow from the engine to the wheels of the vehicle.

[0027] Figure 4-Figure 6 A method of reducing a plateau in vehicle acceleration during an engine start event in response to a vehicle operator requesting wheel torque exceeding the capabilities of an electric machine is described and illustrated. Briefly, the vehicle acceleration plateau can be reduced by transmitting engine torque through the transmission via the low speed input shaft of the dual clutch transmission while, in ...

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Abstract

The application relates to systems and methods for controlling an engine start in a hybrid vehicle. Methods and systems are provided for operating a driveline of a hybrid vehicle that includes an internal combustion engine, an electric machine, and a transmission, where the transmission is downstream of the engine, and where the electric machine is downstream of the transmission. In one example, while the vehicle is being propelled solely via the electric machine, one or more gears of the transmission may be pre-engaged or selected, to prepare the driveline for an engine start event. In this way, driveline torque disturbance and delays in torque requests may be reduced or avoided upon a request for an engine start event.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 463,472, filed February 24, 2017. The entire content of the above-mentioned application is hereby incorporated by reference in its entirety for all purposes. technical field [0003] The present invention generally relates to methods and systems for controlling a transmission during a rolling hybrid engine start event. Background technique [0004] For a hybrid vehicle using an internal combustion engine coupled to a step ratio transmission (e.g., a conventional planetary automatic transmission, a single-clutch automatic manual transmission, a dual-clutch transmission, etc.), where at least one electric motor drives the driven wheels after the transmission Delivering torque, there may be a powertrain mode in which the vehicle is propelled by using only the electric machine, where the transmission input coupling is open, allowing the engine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/08B60W10/11
CPCB60W10/06B60W10/08B60W10/113B60W20/40B60W10/11B60W20/10B60W20/30B60W2510/0638B60W2510/1015B60W2710/1005B60W2710/1011B60W2710/0666B60W2710/083F02D29/02F02D2250/18B60K6/387B60K2006/4825B60W2710/0644F02D41/062F02N11/04B60W10/02B60K6/48B60W2510/244Y10S903/946Y10S903/903Y10S903/909Y10S903/915Y02T10/40Y02T10/62F02D41/26B60W2510/083B60W2510/087B60W2710/021B60W10/30B60W2540/10B60W2710/028B60W2710/081
Inventor K·R·洛柏尔J·梅耶J·A·多林M·J·谢尔顿T·麦卡洛
Owner FORD GLOBAL TECH LLC