Blower-Housed Electric Starter Layout for Heat and Vibration Control
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Solution Overview
Problem
Conventional electric starting systems for outdoor power equipment require a dedicated engine block and flywheel with a ring gear, which increases complexity and costs, and do not efficiently manage the starting process, leading to potential vibration and reduced longevity of components.
Innovation Solution
An electric starting system integrated within the blower housing of an internal combustion engine, featuring a starter motor and battery positioned in a cool quadrant away from hot components, utilizing a starter mount assembly and a controller for power management and soft start features, allowing for efficient and vibration-reduced operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional electric starting system is used with a dedicated engine block and flywheel with ring gear, then the engine can be started electrically, but the device complexity and manufacturing costs increase
Solution Approach 1:
The patent combines the electric starting system components (starter motor, battery, mounting assembly) with the existing blower housing, merging multiple functions into a single integrated structure. This eliminates the need for a dedicated engine block with starter mounting locations and a flywheel with ring gear, thereby reducing device complexity while maintaining electric starting capability
Solution Approach 2:
The blower housing is designed to serve multiple functions: it houses the blower components and simultaneously serves as the mounting structure for the electric starting system. The starter motor is mounted to the blower housing, and the battery is integrated into the same housing, creating a universal structure that performs both air moving and starting functions
2Volume of moving object
If the starter motor is positioned near hot engine components, then the starting system is more compact, but the reliability and longevity of components decrease due to heat exposure
Solution Approach 1:
The blower housing is divided into thermal zones, with the electric starting system components positioned in the cool quadrant away from hot engine components. This spatial segmentation allows the starting system to be integrated into the blower housing while maintaining adequate thermal separation to protect sensitive components from heat damage
3Weight of moving object
If a higher-speed electric motor is used, then the motor weight and size are reduced, but the vibration and current draw increase
Solution Approach 1:
The controller monitors the operational status of the starter motor and adjusts power delivery accordingly. During the engagement phase, the controller limits current draw to prevent excessive vibration and mechanical stress. Once engagement is confirmed, the controller increases power delivery to achieve the higher operating speed, thereby reducing motor size and weight while controlling vibration through feedback-based power management
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 enables a compact, efficient, and reliable electric starting system that reduces vibration and extends component longevity, while allowing for the use of a higher-speed, lighter electric motor, and integrates battery and starter motor within the blower housing for simplified maintenance.
Implementation Method 1
an electric starter motor retained by the starter mount assembly and positioned in the cool half
Implementation Method 2
a battery mounted to the blower housing and positioned in the cool half. The battery is electrically coupled to the electric starter motor
Data Source
AI summary
An engine including an engine block having a cylinder defining a front of the engine, a blower housing coupled to the engine block and defining a hot half positioned adjacent the front of the engine and a cool half opposite the hot half, and an electric starter system positioned within the blower housing. The electric starting system includes a starter mount assembly coupled to the blower housing, an electric starter motor retained by the starter mount assembly and positioned in the cool half, and a battery mounted to the blower housing and positioned in the cool half. The battery is electrically coupled to the electric starter motor.