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Diagnostic system and method using model predictive control

A technology of a control system and a control method, which is applied in the field of vehicle engine control systems and can solve problems such as accurately controlling engine output torque

Active Publication Date: 2017-12-01
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional engine control systems do not control engine output torque as precisely as needed
Additionally, conventional engine control systems do not provide quick response to control signals or coordinate engine torque control among various devices that affect engine output torque

Method used

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  • Diagnostic system and method using model predictive control
  • Diagnostic system and method using model predictive control
  • Diagnostic system and method using model predictive control

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Embodiment Construction

[0119] The engine control module (ECM) controls the torque output of the engine. More specifically, the ECM controls the actuators of the engine based on the requested torque amounts based on target values, respectively. For example, ECM controls intake and exhaust camshaft phasing based on target intake and exhaust phaser angles, throttle valve based on target throttle opening, exhaust gas recirculation (EGR) valve based on target EGR opening And a wastegate of the turbocharger is controlled based on the target wastegate duty cycle.

[0120] The ECM may individually use multiple single-input single-output (SISO) controllers, such as proportional-integral-derivative (PID) controllers, to determine the target value. However, when using multiple SISO controllers, target values ​​can be set to maintain system stability at the expense of possible fuel consumption reduction. Furthermore, the calibration and design of individual SISO controllers can be expensive and time-consuming...

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Abstract

Diagnostic systems and methods using model predictive control are disclosed. The fuel control module transitions engine fueling from rich to lean. The catalyst fault detection module diagnoses whether a fault exists in the exhaust catalyst based on the response of the oxygen sensor to the transition. The prediction module generates predictions based on the model and the set of possible target values. The cost module determines a cost for the set of possible target values ​​based on a comparison of the forecast with the minimum and maximum values. Before the transition, the constraint module selectively adjusts at least one of the minimum value and the maximum value for fault diagnosis. Based on the cost, the selection module selects a set of possible target values ​​from the group of sets of possible target values, and sets a target value based on the selected set of possible target values. An actuator module controls engine actuators based on a first value of the target values.

Description

[0001] Cross References to Related Applications [0002] This application is related to U.S. Patent Application No. 14 / 225,502, filed March 26, 2014, U.S. Patent Application No. 14 / 225,516, filed March 26, 2014, U.S. Patent Application No. 14 / 225,569, filed March 26, 2014 , U.S. Patent Application No. 14 / 225,626, filed March 26, 2014, U.S. Patent Application No. 14 / 225,817, filed March 26, 2014, U.S. Patent Application No. 14 / 225,896, filed March 26, 2014, 2014 U.S. Patent Application No. 14 / 225,507 filed March 26, 2014, U.S. Patent Application No. 14 / 225,808, filed March 26, 2014, U.S. Patent Application No. 14 / 225,587, filed March 26, 2014, March 2014 U.S. Patent Application No. 14 / 225,492, filed March 26, 2014, U.S. Patent Application No. 14 / 226,006, filed March 26, 2014, U.S. Patent Application No. 14 / 226,121, filed March 26, 2014, March 26, 2014 U.S. Patent Application No. 14 / 225,496 filed on March 26, 2014 and U.S. Patent Application No. 14 / 225,891 filed on March 26, 2014...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/02F02D41/22F02D29/02F02D17/02F02P5/145
CPCF02D41/1406F02D41/1439F02D41/1441F02D41/1454F02D41/222F02D35/023F02D2041/001F02D2041/1433F02D2200/0814F02D2200/0816F02D2250/18Y02T10/40G07C5/0808F02D41/1401F02D41/30
Inventor R.J.根斯拉克C.E.惠特尼
Owner GM GLOBAL TECH OPERATIONS LLC