Linear Piston Engine Eliminates Rotary Conversion Losses
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Solution Overview
Problem
Conventional rotary engines incur energy conversion losses when converting linear motion to rotary motion and back to linear motion to drive external linear loads, reducing system efficiency.
Innovation Solution
A linear piston engine design that directly transfers linear forces from pistons to external linear pumps without intermediate rotary motion, using opposing piston assemblies with crankshafts and linear output members to provide parallel reciprocating motion, thereby avoiding energy conversion losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional rotary engines are used to drive external linear loads, then the engine can operate external linear loads, but energy conversion losses occur when converting linear motion to rotary motion and back to linear motion
Solution Approach 1:
The invention extracts and eliminates the intermediate rotary motion conversion mechanism from the system. By directly coupling the linear piston motion to the linear output member, the patent removes the energy-converting rotary intermediate stage, thereby eliminating the associated energy losses and improving overall system efficiency.
Solution Approach 2:
The patent introduces a direct linear transmission mechanism as the intermediary between the piston and the external linear load, replacing the conventional rotary crankshaft mechanism. This direct linear intermediary eliminates the need for linear-to-rotary and rotary-to-linear conversions, thereby reducing energy conversion losses.
2Ease of operation
If opposing piston assemblies with crankshafts are used, then parallel reciprocating motion can be provided to external linear pumps, but device complexity increases compared to single piston designs
Solution Approach 1:
The invention merges two piston assemblies into a single integrated engine structure where both pistons share a common combustion chamber and are synchronized through a shared crankshaft. This combining approach enables parallel reciprocating motion output while avoiding the complexity of completely separate engine units.
Solution Approach 2:
The common crankshaft serves multiple functions: it guides both pistons through their power and return strokes, synchronizes their reciprocating motions, and transmits power to both linear output members. This multi-functionality reduces the need for separate control mechanisms for each piston, thereby managing 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
The linear piston engine achieves increased efficiency by eliminating energy conversion losses associated with rotary motion, with a demonstrated 40% efficiency improvement compared to conventional rotary engines, and potentially allows for reduced engine size and component stress.
Implementation Method 1
a combustion chamber positioned between the first piston chamber and the second piston chamber
Implementation Method 2
a crankshaft positioned in the first piston chamber and coupled to the piston
Implementation Method 3
a linear output member having a proximal end and a distal end, the linear output member coupled to the piston and configured to operate the external linear pump
Data Source
Figure 1~2
Figure 3A~3D
AI summary
A linear piston engine includes a housing having a combustion chamber located between opposing first and second piston chambers. A first piston assembly is located within the first piston chamber, and a second piston assembly is located within the second piston chamber. Each piston assembly includes a piston for reciprocating within the piston chamber. The piston is located adjacent to the combustion chamber. Each piston assembly also includes a crankshaft coupled to the piston for guiding the piston through a power stroke and a return stroke, and a linear output member coupled to the piston for providing a linear output motion based on reciprocating motion of the piston.