Balancer Device Torque Transmission Gear Rattle Reduction
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Solution Overview
Problem
In existing balancer devices for internal combustion engines, a part of the drive-side balancer shaft does not function as a torque transmission path, leading to insufficient torsion bar effect and increased gear rattle between gears in the drive mechanism.
Innovation Solution
The balancer drive gear and balancer driven gear are arranged on the other end side of the drive-side and driven-side balancer shafts, respectively, with the oil pump positioned on the one end side of the driven-side balancer shaft via a drive mechanism, ensuring the overall length of the balancer shafts functions as a torque transmission path and reducing gear rattle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the balancer drive gear and balancer driven gear are arranged on the other end side of the balancer shafts, then the torsion bar effect is sufficiently provided and gear rattle is decreased, but the device complexity increases
Solution Approach 1:
The patent inverts the conventional gear arrangement by placing the balancer drive gear and balancer driven gear on the other end side of the balancer shafts rather than on the same end. This inversion allows the entire length of the balancer shaft to function as a torque transmission path, generating sufficient torsion bar effect to decrease gear rattle between meshing gears.
2Use of energy by moving object
If the oil pump is arranged on the one end side of the driven-side balancer shaft via a drive mechanism, then the torque transmission path is optimized, but the device complexity increases
Solution Approach 1:
The patent introduces a drive mechanism as an intermediary between the balancer shafts and the oil pump. This intermediary component optimizes the torque transmission path by efficiently transferring torque from the balancer shafts to the oil pump, improving torque transmission efficiency while maintaining a manageable level of device complexity.
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 configuration effectively decreases gear rattle by providing a sufficient torsion bar effect, maintaining compactness, and improving fuel efficiency by optimizing torque transmission and rotation speed.
Implementation Method 1
a torsion bar effect through a torsion torque generated on the drive-side balancer shaft and the driven-side balancer shaft
Data Source
AI summary
Provided is a balancer device for an internal combustion engine capable of effectively decreasing gear rattle between gears of a drive mechanism. A balancer drive gear and a balancer driven gear are arranged on a second end side of a drive-side balancer shaft and a second end side of a driven-side balancer shaft, respectively, and an oil pump is arranged on a first end side of the driven-side balancer shaft via the drive mechanism.