Off-Road Vehicle Engine Layout for Lower Height and Clearance
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Solution Overview
Problem
Existing off-road vehicle designs struggle to sufficiently reduce the overall height of the engine while maintaining ground clearance and preventing interference between the engine and transmission components.
Innovation Solution
The engine design features a cylinder with a center axis that inclines or extends horizontally, allowing the transmission to be positioned adjacent to the engine in a direction orthogonal to the crankshaft, thereby reducing the engine's overall height and preventing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the transmission is positioned behind the engine, then the engine can be configured with a rearward-inclined cylinder, but the overall height of the engine cannot be sufficiently reduced due to interference between the engine and transmission
Solution Approach 1:
The patent repositions the transmission from a longitudinal arrangement (behind the engine) to a lateral arrangement (adjacent to the engine in the width direction). This dimensional change allows the cylinder to extend horizontally without interfering with the transmission, enabling sufficient reduction of engine height while maintaining proper component spacing
Solution Approach 2:
The patent employs asymmetric layout by positioning the transmission adjacent to the engine body rather than behind it, and by having the cylinder axis extend horizontally rather than vertically or at conventional angles. This asymmetric configuration optimizes space utilization and eliminates interference between components
2Ease of manufacture
If the cylinder center axis extends vertically, then the engine structure is conventional, but the overall height of the engine body is increased
Solution Approach 1:
The patent changes the orientation parameter of the cylinder axis from vertical to horizontal. This parameter change fundamentally alters the engine's height profile, reducing the overall height while maintaining the conventional V-type cylinder configuration and manufacturing approaches
3Adaptability or versatility
If the cylinder center axis is inclined at a conventional angle, then the engine design is traditional, but the ground clearance of the off-road vehicle is reduced
Solution Approach 1:
By transitioning the cylinder axis from vertical or angled orientation to horizontal extension, the patent eliminates the vertical space occupation that would reduce ground clearance. This dimensional change allows the engine to be mounted lower on the vehicle chassis, maximizing ground clearance for off-road performance
Data Source
AI summary
An off-road vehicle, including: an engine body having a cylinder and a crankshaft that extends in a horizontal direction; and a transmission disposed adjacent to the engine body in a direction orthogonal to an axial direction of the crankshaft in a horizontal direction, in which the cylinder has a center axis inclining to an opposite side to a direction in which the transmission is disposed in a horizontal direction or extending horizontally to the opposite side.