Single Actuator Exhaust Valve System with Non-Operating Cable Area
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Solution Overview
Problem
Conventional exhaust pipe valve systems in vehicles require multiple independent actuators for two exhaust pipe valves, leading to complex device structures and increased costs.
Innovation Solution
A single actuator unit with two operation parts connected via cables controls multiple exhaust pipe valves, where one operation part has a non-operating area to reduce component count and simplify the system, allowing for efficient exhaust flow rate adjustment based on engine speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple independent actuators are provided for each exhaust pipe valve, then control performance over exhaust system is improved, but device structure becomes complex and cost increases
Solution Approach 1:
The patent combines multiple actuator functions into a single integrated actuator that controls multiple exhaust pipe valves. This single actuator includes multiple operation parts that can independently control different valves, merging what would traditionally require separate actuators into one unified device, thereby simplifying structure while maintaining control performance
Solution Approach 2:
The single actuator is designed with multi-functionality to perform the roles of multiple independent actuators. It includes multiple operation parts that can independently operate to control different exhaust pipe valves, allowing one device to fulfill multiple control functions that would traditionally require separate actuators
2Reliability
If multiple independent actuators are provided for each exhaust pipe valve, then control performance over exhaust system is improved, but cost increases
Solution Approach 1:
The patent combines multiple actuator functions into a single integrated actuator that controls multiple exhaust pipe valves. This single actuator includes multiple operation parts that can independently control different valves, merging what would traditionally require separate actuators into one unified device, thereby simplifying structure while maintaining control performance
3Device complexity
If a single actuator controls multiple exhaust pipe valves, then device structure is simplified and cost is reduced, but control precision may be compromised
Solution Approach 1:
The single actuator is segmented into multiple independent operation parts, each capable of independently controlling a specific exhaust pipe valve. This segmentation allows each operation part to precisely control its associated valve while being part of a unified actuator structure, maintaining control precision despite the simplified overall structure
Solution Approach 2:
The patent introduces cables as intermediary elements that transmit control forces from the operation parts to the exhaust pipe valves. These cables act as flexible transmission mechanisms that allow precise control forces to be delivered from the single actuator to multiple valves, maintaining control precision while enabling the simplified single-actuator architecture
Data Source
AI summary
An exhaust pipe valve system of an internal combustion engine includes: a plurality of exhaust pipe valves; and an actuator unit being an operation unit which performs an opening/closing operation of the exhaust pipe valves, wherein: the operation unit includes a first pulley and a second pulley being at least two operation parts which are connected to the plural exhaust pipe valves via wire cables respectively to open/close the exhaust pipe valves; and at least one of the operation parts has a non-operating area in which the operation part does not cause the corresponding cable to work in a predetermined operating range of the operation unit.