IP Library › Granted Patent US 7,040,094
Granted Patent B2
US 7,040,094 · App. 10/657,900 · Granted May 9, 2006

Staged combustion with piston engine and turbine engine supercharger

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Quick Facts
Patent No.
US 7,040,094
App. No.
10/657,900
Granted
May 9, 2006
Kind
B2
Abstract

A combustion engine method and system provides increased fuel efficiency and reduces polluting exhaust emissions by burning fuel in a two-stage combustion system. Fuel is combusted in a piston engine in a first stage producing piston engine exhaust gases. Fuel contained in the piston engine exhaust gases is combusted in a second stage turbine engine. Turbine engine exhaust gases are used to supercharge the piston engine.

Claims (13)

1. A combustion engine apparatus, comprising:

fuel, said fuel made up of a first portion and a second portion,

a first stage piston engine for combusting said first portion of said fuel in a first stage, said first stage piston engine producing piston engine exhaust gases with said piston engine exhaust gases containing said second portion of said fuel;

a second stage turbine engine for combusting said second portion of said fuel contained in said piston engine exhaust gases in a second stage at stoichiometric conditions, said second stage turbine engine producing turbine engine exhaust gases;

a supercharger for supercharging said piston engine using said turbine engine exhaust gases, and

means for directing said turbine exhaust gases from said second stage turbine engine into said supercharger.

2. The combustion engine apparatus of claim 1 wherein said first stage piston engine is a compression ignition engine, a homogenous charged compression ignition engine, a variable compression engine, a nitrogen enriched air combustion engine, a rotating engine, a linear engine, and/or a reciprocating engine.

3. The combustion engine apparatus of claim 1 including a compressor for providing compressed air to said second stage turbine engine for combusting said fuel contained in said piston engine exhaust gases.

4. The combustion engine apparatus of claim 1 wherein said fuel is oil, methane, natural gas, ammonia, alcohols and/or ethers.

5. The combustion engine apparatus of claim 1 wherein said fuel is any combustible matter.

6. The combustion engine apparatus of claim 5 wherein said any combustible matter comprises fossil fuels including oil, natural gas, and/or coal.

7. The combustion engine apparatus of claim 5 wherein said any combustible matter comprises inorganic fuels including ammonia, hydrazine, and/or calcium.

8. The combustion engine apparatus of claim 1 wherein said any combustible matter comprises organic fuels including alcohols, ethers, and/or wood.