Intake Throttle Valve Turbocharger Speed Control
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Solution Overview
Problem
Existing power systems with turbocharged engines require additional mechanical components like wastegates to control turbocharger rotational speed, increasing complexity and cost.
Innovation Solution
A method and device using an intake throttle valve (ITV) controlled by an electronic control module (ECM) to adjust air flow and control turbocharger rotational speed based on desired and operating parameter values, eliminating the need for mechanical components like wastegates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional mechanical components like wastegates are used to control turbocharger rotational speed, then turbocharger speed control is achieved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the turbocharger speed control function from the exhaust system (wastegate) and relocates it to the intake system (throttle valve). By removing the wastegate component and using the existing throttle valve for dual purposes (intake control and turbocharger speed control), the invention reduces device complexity while maintaining control capability
Solution Approach 2:
The throttle valve is given a dual function: it controls both the intake air flow to the engine and the rotational speed of the turbocharger. This multi-functionality eliminates the need for separate wastegate components, thereby reducing device complexity while achieving the same control objective
2Reliability
If wastegates and other mechanical components are added to control turbocharger, then turbocharger rotational speed can be controlled, but cost increases
Solution Approach 1:
The throttle valve performs dual functions: controlling intake air flow and regulating turbocharger speed. This eliminates the need for additional wastegate components, reducing part count and manufacturing cost while maintaining control functionality
Solution Approach 2:
The control function is extracted from the traditional exhaust-side wastegate and transferred to the intake-side throttle valve, eliminating the need for expensive additional mechanical components and reducing overall system cost
3Productivity
If variable geometry actuators or exhaust throttles are used to control swallowing capacity, then turbocharger performance can be optimized, but device complexity increases
Solution Approach 1:
The throttle valve controls both intake air flow and turbocharger swallowing capacity through its position adjustment. By using the same component for both functions, the invention achieves turbocharger performance optimization without adding variable geometry actuators or exhaust throttles, thus avoiding increased device complexity
Solution Approach 2:
The patent merges the intake control function and turbocharger speed control function into a single throttle valve mechanism. This consolidation achieves both performance optimization and complexity reduction by eliminating the need for separate control mechanisms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces hardware and design complexity, enhances durability, and maintains turbocharger performance within designed operational ranges, reducing costs and simplifying engine design by directly controlling turbocharger speed through air flow adjustments without mechanical components.
Implementation Method 1
causing, based on the difference, a position of an intake throttle valve to be adjusted to control a rotational speed of a turbocharger
Data Source
AI summary
Control of a turbocharger of a power system is disclosed. A controller may receive a desired value for a parameter of an engine. The controller may receive an operating value of the parameter. The controller may set, based on the desired value and the operating value, a position of an intake throttle valve of the engine to control air flow through a turbocharger of the engine.