Torque Control System Actuator Coordination Turbo Lag

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Solution Overview

Problem

Traditional engine control systems fail to accurately control engine torque output and respond slowly to control signals, leading to inefficiencies and circular dependencies between actuator positions, particularly when increasing torque output, which exacerbates issues like turbo lag.

Innovation Solution

A torque control system comprising a torque correction factor module, an RPM-torque transition module, and a selection module that determines and selectively outputs torque correction factors to optimize actuator positions and improve torque control, using a closed-loop torque control module to iteratively update actuator positions and achieve desired torque levels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional engine control systems are used to control torque output, then the system structure is simple, but the torque control accuracy is insufficient and response speed is slow

Engineering Contradiction:

Improvetorque control accuracyVSAvoidcontrol system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The control system is segmented into multiple functional modules: a torque correction factor determination module that calculates correction factors based on actuator positions, an RPM-torque transition module that manages transitions between control modes, and a selection module that selectively outputs appropriate correction factors. This modular segmentation enables precise torque control through coordinated adjustment of multiple actuators while maintaining manageable system complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary determination of torque correction factors based on current actuator positions before executing torque adjustments. By pre-calculating correction factors and preparing transition parameters in advance, the system achieves rapid response to torque commands without requiring complex real-time computation during actuator adjustment, thus improving control accuracy while keeping the control architecture practical.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If traditional control systems increase torque output, then the torque can be increased, but the response time is slow and turbo lag is exacerbated

Engineering Contradiction:

Improvetorque outputVSAvoidresponse time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The system pre-determines torque correction factors based on current actuator positions and predicted torque requirements before torque increase is commanded. This preliminary calculation allows the control system to prepare optimal actuator adjustment parameters in advance, enabling rapid torque response when demanded, thus improving productivity while minimizing response time delays and reducing turbo lag effects.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The control system dynamically adjusts actuator positions based on real-time feedback and predicted torque requirements. By continuously updating correction factors and coordinating multiple actuators (throttle, fuel injection, variable valve timing) dynamically, the system achieves rapid torque increases without the sluggish response characteristic of traditional systems, effectively reducing turbo lag while maintaining high torque output capability.

Inventive Principle:

Principle #15Dynamics

3Measurement precision

If multiple actuators are coordinated for torque control, then the torque control accuracy improves, but circular dependencies between actuator positions create control complexity

Engineering Contradiction:

Improvetorque control accuracyVSAvoidactuator coordination complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The control system segments the coordination of multiple actuators into distinct functional modules, each responsible for specific correction factor calculations. The torque correction factor module handles overall torque adjustments, the RPM-torque transition module manages mode transitions, and the selection module coordinates actuator output selection. This segmentation enables precise torque control through coordinated actuator adjustment while avoiding circular dependencies by establishing a clear hierarchical control structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system introduces torque correction factors as intermediary parameters that mediate between desired torque output and individual actuator positions. Instead of directly coordinating multiple actuators which creates circular dependencies, the correction factors serve as intermediate control variables that translate torque requirements into coordinated actuator adjustments, simplifying the control architecture while maintaining high torque control accuracy.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS7788024B2Method of torque integral control learning and initialization

Publication Date: 2010.08.31 GM GLOBAL TECHNOLOGY OPERATIONS LLC

AI summary

A torque control system comprises a torque correction factor module, a RPM-torque transition module, and a selection module. The torque correction factor module determines a first torque correction factor and a second torque correction factor. The RPM-torque transition module stores the first torque correction factor. The selection module selectively outputs one of the first torque correction factor and the second torque correction factor based on a control mode of the torque control system.