Boost Pressure Compensation Controller for Smooth Actuator Switching

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Solution Overview

Problem

Existing controllers for controlling boost pressure in charged internal combustion engines with multiple actuators experience sudden changes and fluctuations due to differing system gains, leading to driver-perceptible jerks and inadequate traction force during transitions between actuators.

Innovation Solution

A compensation controller with a correction module smooths controller parameters and adjusts the integrative component using the ratio of system gains during transitions, preventing sudden changes and ensuring seamless actuator switching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the control is transferred from one actuator to another actuator with different system gains, then the target variable can be achieved with different actuators, but sudden changes in controller output occur leading to drops in boost pressure and fluctuations in traction force

Engineering Contradiction:

Improveactuator switching capabilityVSAvoidboost pressure stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary action by detecting the transition range between actuators in advance and preemptively smoothing the controller parameters and correcting the integrative component before the actual switch occurs. This prevents sudden changes in controller output that would otherwise cause boost pressure drops and traction force fluctuations, thereby maintaining stability during actuator switching.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent changes controller parameters dynamically based on the operating state. Specifically, it smooths controller parameters and corrects the integrative component using the ratio of system gains when transitioning between actuators with different gains. This parameter adaptation ensures continuous and smooth control output, preventing instability during actuator transitions.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If an integrative component is transferred from one actuator to another actuator with different system gains, then the compensation control can be maintained, but overcompensation or undercompensation occurs leading to control errors

Engineering Contradiction:

Improvecompensation control continuityVSAvoidcontrol accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent corrects the integrative component by applying the ratio of system gains when transitioning between actuators. This parameter adjustment ensures that the integrative component's magnitude is appropriately scaled for the new actuator's characteristics, preventing overcompensation or undercompensation and maintaining control accuracy across actuator transitions.

Inventive Principle:

Principle #35Parameter changes

3Speed

If aggressive compensation control is used to achieve maximum performance, then the response speed is improved, but sudden changes occur during actuator transitions causing driver-perceptible jerks

Engineering Contradiction:

Improvecontrol response speedVSAvoiddriver-perceptible jerks

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent employs beforehand cushioning by smoothing the controller parameters and adjusting the integrative component in the transition range before the actuator switch. This cushioning effect prevents abrupt changes in control output, eliminating driver-perceptible jerks while preserving the benefits of aggressive compensation control during stable operation.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS12442342B2Compensation controller for controlling the boost pressure for charged internal combustion engines

Publication Date: 2025.10.14 BAYERISCHE MOTOREN WERKE AG

AI summary

An apparatus associated with compensating boost pressure in a charged internal combustion engine includes an electronic control unit. The electronic control unit has a correction module. The electronic control module is configured to cooperate with at least two actuators that differ in terms of system gain. The correction module is configured such that firstly at least one controller parameter is smoothed within a defined transition range. The correction module is configured such that secondly the integrative component is transferred with a correction value corresponding to a ratio of or the difference between the system gains when the control passes from a first of the at least two actuators with the first system gain to a second at least two actuators with the second system gain that differs from the first.