Dynamic Muffler Volume Control via Speed Signals
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Solution Overview
Problem
Existing muffler systems for internal combustion engines lack the ability to adjust noise emission levels precisely and easily, necessitating extensive adjustments to comply with varying global noise emission limits, and they do not offer high functional reliability.
Innovation Solution
A muffler arrangement that uses a control device to receive vehicle speed and engine speed signals, calculating transmission gear signals to actuate an adjustment body within the exhaust gas flow pipe, allowing for precise adjustment of the muffler volume and noise emission, which can be influenced by the adjustment body's position, affecting exhaust gas flow and back pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the muffler volume is adjusted to comply with varying global noise emission limits, then noise emission compliance is improved, but the complexity of adjustment increases
Solution Approach 1:
The patent implements dynamic adjustability of the muffler volume through an adjustment body that can change position based on driving conditions (vehicle speed, engine speed, transmission gear). This allows the exhaust system to adapt to varying noise emission limits across different operating scenarios, resolving the contradiction between compliance adaptability and adjustment complexity by making the system dynamically responsive rather than requiring manual reconfiguration.
Solution Approach 2:
The control device automatically determines the appropriate muffler volume based on received signals about vehicle speed, engine speed, and transmission gear, then actuates the adjustment drive accordingly. This self-service capability eliminates the need for external intervention or complex manual adjustment procedures, allowing the system to comply with varying noise limits autonomously while maintaining simple operation.
2Measurement precision
If the adjustment body is actuated based on multiple signals (vehicle speed, engine speed, transmission gear), then adjustment precision is improved, but the control system complexity increases
Solution Approach 1:
The control device serves multiple functions by receiving and processing various signals (vehicle speed from wheel speed sensors, engine speed from crankshaft position sensors, transmission gear from gear position sensors) and using them collectively to determine the optimal muffler volume. This multi-functional approach improves adjustment precision by considering multiple operating parameters simultaneously while avoiding the need for separate control systems for each signal type.
Solution Approach 2:
The system continuously monitors operating conditions through multiple sensors and uses this feedback information to dynamically adjust the muffler volume via the adjustment drive. The control device processes feedback from vehicle speed, engine speed, and transmission gear signals to determine the appropriate adjustment, achieving precise control while maintaining a unified feedback-based control architecture rather than multiple independent control systems.
Data Source
AI summary
The invention relates to a muffler arrangement for exhaust systems. The muffler arrangement has a muffler and a control device (5). The muffler comprises an exhaust gas flow pipe which has at least one exhaust gas inlet opening and at least one exhaust gas outlet opening. The muffler further comprises at least one adjustment body for influencing the exhaust gas flow in the exhaust gas flow pipe, said adjustment body being adjustable between an open position and a closed position, and at least one adjusting drive which is connected to the at least one adjustment body in order to adjust same. The control device (5) has a travel speed signal input (13) for receiving travel speed signals of the motor vehicle and an engine speed signal input (15) for receiving engine speed signals of the motor vehicle and is connected to the at least one adjusting drive so as to transmit data in order to adjust the at least one adjustment body dependent on the travel speed signals and the engine speed signals of the motor vehicle.