Closed-loop speed and torque damping control for hybrid and electric vehicles

A technology of speed control and damping control, which is applied to hybrid vehicles, electric vehicles, motor vehicles, etc., and can solve problems such as insufficient vibration damping

Inactive Publication Date: 2012-04-04
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single variable feedback / control scheme may provide insufficient vibration damping in vehicles with multiple prime movers

Method used

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  • Closed-loop speed and torque damping control for hybrid and electric vehicles
  • Closed-loop speed and torque damping control for hybrid and electric vehicles
  • Closed-loop speed and torque damping control for hybrid and electric vehicles

Examples

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Embodiment Construction

[0017] Referring to the drawings, wherein like reference numerals correspond to like or similar components throughout the several views, a vehicle 10 is shown in figure 1 Shown with transmission 18 . The transmission 18 receives input torque from a plurality of on-board torque-generative devices. The torque-generative devices may include an internal combustion engine 16 and / or one or two traction motors 12 , 14 , the actual number of traction motors being dependent upon vehicle design. Such a design could be a parallel hybrid as shown in one embodiment, a series hybrid or another design. Motor controller 22 with control logic 100 provides closed loop motor speed control in conjunction with closed control of driveline damping torque from traction motor(s) 12, 14, as referenced below figure 2 and 3 explained in more detail.

[0018] use as figure 2 As shown in the control logic 100, the controller 22 automatically combines damping torque control and motor speed control in...

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PUM

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Abstract

A method for minimizing driveline disturbances in a vehicle includes using a controller to automatically combine a damping torque control command with a motor speed control command in a closed loop to prevent a perceptible discontinuity in an applied motor torque during a change in transmission gear states. The method may include calculating error values in the rotational speeds of one or two traction motors, and using the calculated error value(s) to determine a required damping torque. The controller can multiply the error value for one traction motor by a gain value of the other traction motor before determining the required damping torque. A vehicle includes first and second traction motors, a transmission, and a controller. The transmission is powered by the traction motors, and the controller combines a damping torque control command with motor speed control command to prevent a discontinuity in an applied motor torque as noted above.

Description

technical field [0001] The present invention relates to a method and control system for implementing closed-loop motor speed control in cooperation with closed-loop damping of driveline oscillations in a vehicle. Background technique [0002] A hybrid electric vehicle (HEV) selectively utilizes an internal combustion engine and one or more high-voltage traction motors as alternative or concurrent power sources to optimize fuel efficiency. That is, an HEV with a full hybrid powertrain may at least some of the time (usually just when starting the HEV and when operating below a threshold vehicle speed) via the traction motor(s) Electric drive. One or more traction motors may alternately draw power from and deliver power to the energy storage system as desired. Once the vehicle is started or when operating above a threshold speed, the engine may be restarted using one of the plurality of traction motors or an auxiliary starter motor and then quickly engaged with the transmissi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/08B60W20/00
CPCB60W2540/165B60W2710/105B60W2710/081Y02T10/7258B60W2710/1011B60W2510/083B60W30/19B60W10/11B60W2710/083B60W10/08B60W2510/0657B60W20/00Y02T10/72B60W2710/085
Inventor R.L.莫里斯
Owner GM GLOBAL TECH OPERATIONS LLC
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