Vehicle Engine Vibration Reducer with Torque Rod
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Off-road vehicles with engines mounted behind seats experience significant vibration transmission to the frame and occupants due to inadequate support, leading to an uncomfortable ride.
Innovation Solution
A vehicle design featuring a vibration reducing member positioned between the engine and frame, with a torque rod and rubber dampers to absorb and direct vibrations, effectively reducing engine resonance and transmission to the seat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the engine is mounted on the frame at three points without upper support, then the engine mounting structure is simple, but engine vibration is transmitted to the frame and seats, causing an uncomfortable ride
Solution Approach 1:
A vibration reducing member is introduced as an intermediary component between the engine and the frame. This member includes a mounting support connected to the lower portion of the engine and a vibration reducing arm connected to the upper portion of the engine, creating a two-stage vibration isolation system that effectively reduces vibration transmission to the frame and seats
2Volume of moving object
If the engine is disposed behind the seat, then the engine can be compactly arranged, but the short distance between the seat and engine causes vibration to easily transmit to the driver and passenger
Solution Approach 1:
The vibration isolation system is segmented into two independent parts: a mounting support for the lower portion of the engine and a vibration reducing arm for the upper portion. This segmentation allows each component to address specific vibration modes independently, providing comprehensive vibration reduction while maintaining the compact engine placement behind the seat
3Device complexity
If the engine and frame resonate with each other, then the mounting structure is simple, but the resonance amplifies vibration and causes an uncomfortable ride
Solution Approach 1:
The vibration reducing member introduces dynamic characteristics to the mounting system through the vibration reducing arm that can flex and absorb vibrational energy. This dynamic element disrupts the rigid connection that would otherwise allow resonance between the engine and frame, converting harmful resonant vibrations into manageable flexural movements
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 significantly reduces engine vibration and resonance, providing a more comfortable ride by effectively utilizing space and minimizing vibration transmission to the seat, even when the engine is centered or offset in the vehicle's width direction.
Implementation Method 1
a vibration reducing member provided between the engine and the frame, at a higher position that is higher than the center of the engine in an up-down direction
Implementation Method 2
a vibration reducing member provided between the engine and the frame
Data Source
AI summary
A vehicle includes a frame supported by a pair of front wheels and a pair of rear wheels; a seat supported by the frame; an engine disposed behind the seat; a mounting support provided between the engine and the frame, at a lower position that is lower than a center of the engine in an up-down direction; and a vibration reducing member provided between the engine and the frame, at a higher position that is higher than the center of the engine in the up-down direction. The vibration reducing member includes a torque rod extending in a direction perpendicular or substantially perpendicular to a crank shaft when the vehicle is viewed in a plan view; and a rubber damper provided at each end of the torque rod.