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Method for improving transmission shifting

A technology of transmission and automatic transmission, applied in the system field of drivability and fuel economy, can solve the problems of difficult deceleration of prime mover, increase of output torque of transmission, etc.

Inactive Publication Date: 2018-01-05
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to decelerate the prime mover at the desired rate and reduce the torque disturbance at the transmission output shaft because the prime mover is accelerated just before the shift
Therefore, the transmission output torque may increase by more than desired amount as a result of the shift

Method used

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  • Method for improving transmission shifting
  • Method for improving transmission shifting
  • Method for improving transmission shifting

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Embodiment Construction

[0038] The present invention relates to controlling the drive train of a hybrid vehicle. Such as Figure 1-3 As shown, the hybrid vehicle may include an engine and an electric motor. The engine may or may not be run with a driveline integrated starter / generator (such as an electric motor or motor, which may be referred to simply as DISG) during vehicle operation. The driveline integrated starter / generator is engaged into the driveline on the same axis as the engine crankshaft and turns whenever the torque converter impeller rotates. Also, DISG may not selectively engage or disengage the driveline. Rather, the DISG is an integral part of the drive train. Also, the DISG can be operated with or without the engine running. The mass and inertia of the DISG belongs to the driveline to provide or absorb torque from the driveline when the DISG is not operating.

[0039] The drive train can be Figure 4 method runs. In some examples, the drive train may be based on Figure 5-10...

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Abstract

The method involves coupling an engine (10) with a gear box over a powertrain separation clutch in response to a request for upshifting of the gear box during an inertia phase of the upshifting of the gear box, where the separation clutch is positioned in a powertrain between the engine and a torque converter. The engine is started when engine rotation speed reaches a threshold speed. An input torque to the gear box is reduced in response to the request for upshifting the gear box over a targeted coupling of the engine to an input shaft of the gear box. An independent claim is also included for a hybrid vehicle system.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application 61 / 643,139, filed May 4, 2012, the entire contents of which are hereby incorporated by reference for all purposes. technical field [0003] The present invention relates to systems and methods for improving the drivability and fuel economy of vehicles. The method is particularly useful for engines selectively connected to an electric motor and a transmission. Background technique [0004] The transmission can be shifted from a lower gear to a higher gear to allow the prime mover (eg, an engine or electric motor) and the vehicle in which the transmission is disposed to continue to accelerate to allow the prime mover to run at an efficient operating speed. During a shift, the prime mover may be decelerated to reduce the torque increase that may occur at the transmission output shaft at the end of the shift. However, it is difficult to decelerate th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60W10/08B60W10/103B60W20/00
CPCB60K6/48B60W10/02B60W10/08B60W10/11B60W10/115B60W20/00B60W30/19B60Y2400/426F16H61/04F16H61/684F16H63/502F16H2061/0425Y02T10/62
Inventor G·M·皮尔特伦J·A·多林D·C·瑞德A·O’C·吉布森S-H·李
Owner FORD GLOBAL TECH LLC
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