Kruse Limited Temperature Cycle for High Efficiency Direct Injection Engines

The Kruse Limited Temperature Cycle, invented by Doug Kruse and awarded a United States Patent in November, 1993, is an evolutionary thermodynamic engine cycle which improves the efficiency of current Otto and Diesel cycle engines.

Based upon the laws of physics and thermodynamics, it enhances the traditional internal combustion engine cycles by including a constant temperature (isothermal) process.

The Laws of Physics
Ideal gas equation of state pV=nRT
Where:	p = pressure V = volume n = number of molecules R = perfect gas constant T = temperature
The Laws of Thermodynamics Engine cycles are defined by their heat input process, using the ideal gas equation.
1. Carnot Cycle 2. Otto Cycle 3. Diesel Cycle 4. Kruse Cycle	Constant temperature heat input Constant volume heat input Constant pressure heat input Limited temperature heat input	pV=nRT pV=nRT pV=nRT pV=nRT
The Kruse Limited Temperature Cycle is the only ideal model to make use of change in all three working fluid variables (pressure, volume and temperature) during combustion. Additionally, the new scientific model teaches best use of the benefits gained from higher specific molecular count (n/V) in the working fluid during expansion (ultra-lean-burn).

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