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State transition control of multi-mode hybrid transmission

An actuator and total control technology, applied in the system field, can solve problems such as difficulty in maintaining closed-loop control

Active Publication Date: 2017-05-24
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even with PI or PID control logic, it may still be difficult to maintain smooth closed-loop control during certain transitional vehicle events, such as hybrid state transitions or control gain decay events

Method used

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  • State transition control of multi-mode hybrid transmission
  • State transition control of multi-mode hybrid transmission
  • State transition control of multi-mode hybrid transmission

Examples

Experimental program
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Embodiment Construction

[0017] Referring to the drawings, like reference numerals denote like parts throughout the several views, figure 1 An exemplary powertrain 10 is shown schematically. Powertrain 10 includes a number of physical torque-generative devices, hereinafter referred to as torque actuators. In the configuration shown, the torque actuator comprises an internal combustion engine 12 and respective first and second motor / generator units M A and M B . Different torque actuators may be used in other embodiments, such as more or fewer motor / generator units.

[0018] The control methods described herein can be used in multi-mode dynamic systems to avoid discontinuous closed-loop, total control torque induced, and / or carryover velocity oscillations from erroneous control histories that Typically captured via the integral (I) torque term of a proportional-integral (PI) control scheme. Controller 50 executes logic to achieve desired control objectives at predetermined vehicle events. As used...

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Abstract

A powertrain including a controller and gear sets, clutches, rotatable members and torque actuators (such as an engine) and one or more motor / generator units. Each torque actuator outputs a total control torque. The total control torque from a given actuator is used to achieve a target value, which is a torque value for a member of one of the gear set, clutch, or rotatable member. The controller includes proportional-integral (PI) control logic. The total control torque is the sum of the proportional and integral torque terms from the PI control logic. the controller detects a predetermined vehicle event, such as a hybrid range state change or a control gain decay event, and then automatically resets the integral control torque term(s) to a physical target value during the requested vehicle event, To thereby maintain the overall control torque to the same target value throughout the execution of the predetermined vehicle event.

Description

technical field [0001] The present invention relates to a system and method for controlling state transitions of a multi-mode hybrid transmission. Background technique [0002] Hybrid powertrains improve vehicle fuel economy through the use of different torque-generative devices relative to conventional powertrains. The various torque-generative devices (also referred to as torque actuators) of the hybrid powertrain are selected by the hybrid controller based on the current range state torque request. A typical hybrid torque actuator includes an internal combustion engine and one or more electric motor / generators. The output torque generated by the torque actuators is ultimately transferred through one or more gear sets of the transmission to an output member, which in turn is connected to the drive axle(s) of the vehicle. [0003] A strong hybrid drivetrain system controls multiple torque actuators in a closed loop using proportional-integral (PI) or proportional-integral...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/66F16H59/50
CPCF16H3/66F16H59/50F16H61/2807F16H2200/201F16H2200/0004B60K6/365B60K6/387B60K6/445B60W10/115B60W30/188B60K2006/381B60W2050/001B60W2710/105B60W10/06B60W10/08B60W20/10B60W20/40Y02T10/62F16H61/68
Inventor S.叶R.L.莫里斯
Owner GM GLOBAL TECH OPERATIONS LLC