Vehicle Engine Air Intake With Spring-Actuated Bypass Opening
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Solution Overview
Problem
Existing air intake systems for vehicle engines, particularly in helicopters, suffer from slow opening of bypass air intakes during filter clogging, which can lead to engine performance issues and safety hazards due to the slow actuation speed of current actuator devices, and the use of electric motors increases bulkiness, weight, and power consumption.
Innovation Solution
An air intake unit with a movable air filter and a spring-actuated actuator device that allows rapid opening of the bypass air intake, utilizing a mechanical spring to instantly move the shutter element from a closed to an open position, reducing dependency on electric motors and maintaining compact size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a slow actuator device is used to control the bypass air intake, then the device complexity and power consumption are reduced, but the opening speed of the bypass air intake becomes too slow causing engine performance loss
Solution Approach 1:
The spring is pre-compressed during normal operation to store elastic potential energy. When filter clogging is detected, the stored energy is released to instantly open the bypass air intake, eliminating the need for complex high-power actuators during the critical opening action.
Solution Approach 2:
The patent replaces the electric motor-based actuator with a spring-based mechanical actuator. The spring provides the necessary force to open the bypass air intake rapidly without requiring electric motors, gear transmissions, or complex control systems, thus reducing device complexity while maintaining high opening speed.
2Speed
If an electric motor is used to increase the opening speed of the bypass air intake, then the opening speed improves, but the bulkiness, weight, and power consumption increase significantly
Solution Approach 1:
The patent eliminates the electric motor and replaces it with a spring-based mechanical system. The spring provides the necessary force through elastic potential energy storage and release, achieving rapid opening of the bypass air intake without the weight and complexity of electric motors and associated control systems.
Solution Approach 2:
The spring actuator system is self-contained and does not require external power sources or complex control electronics. The spring automatically compresses during normal operation and expands when needed to open the bypass air intake, providing a self-sufficient mechanism that reduces overall system weight.
3Length of moving object
If the bypass air intake opening stroke is reduced to decrease actuator size, then the actuator dimensions are reduced, but the air flow capacity through the bypass intake is compromised
Solution Approach 1:
The spring is pre-compressed to store sufficient elastic potential energy that can rapidly move the shutter element through the required opening stroke. This preliminary energy storage allows the actuator to achieve both rapid opening and adequate air flow capacity without requiring a longer stroke or larger actuator dimensions.
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
The solution enables nearly instantaneous opening of the bypass air intake, ensuring engine safety and performance by quickly bypassing the filter, thus preventing engine power loss and enhancing flight safety without significant size or weight increase.
Implementation Method 1
an actuator device (13) comprising a spring (14) configured to generate, by expanding, an opening movement that moves the shutter element (11) from a closed position to an open position
Data Source
AI summary
An air intake unit for an engine of a vehicle includes a housing, a bypass air intake, a shutter element, and actuator. A plenum is defined inside the housing which can be connected to the engine. Air coming from the outside needed for the operation of the engine can be sucked into the plenum through the bypass air intake. The shutter element is coupled to the bypass air intake and is mounted to move between a closed position, in which the shutter element closes the bypass air intake, and an open position, in which the shutter element leaves the passage through the bypass air intake free. The actuator is configured to move the shutter element between the closed position and the open position. The actuator has a spring configured to generate, by expanding, an opening movement moving the shutter element from the closed position to the open position.