Two cycle heat engine

Details Two cycle heat engine Two cycle heat engine

2000-06-13

2001-08-14

Nguyen, Hoang (Department: 3746)

Power plants

Fluid within expansible chamber heated or cooled

Having means within the working chamber to effect the...

C060S514000

Reexamination Certificate

active

06272855

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates in general to a heat engine and, and more particularly to a two stage heat engine using a low boiling point liquid.
BACKGROUND OF THE INVENTION
There are many different types of heat engines. One heat engine is disclosed in U.S. Pat. No. 5,983,640 entitled “Heat Engine” and issuing to Czaja on Nov. 16, 1999. Therein disclosed is an open cycle heat engine using an air-steam mixture. Most engines typically use water that is converted into steam. Water boils at about one hundred degrees centigrade or two hundred and twelve degrees Fahrenheit at sea level atmospheric pressure. The steam produced by boiling water is often used to drive a piston. However, general relativity high heat is required to boil water. Additional the high temperature water may cause corrosion in many parts of the engine. Additionally, such engines are not as efficient as they could be. Additionally, there is often a delay in heating the water, which causes the engine to respond slowly. Therefore there is a need for a lower temperature faster response heat engine.
SUMMARY OF THE INVENTION
The present invention relates to a two stage heat engine that uses a low boiling point liquid heated at a first stage or chamber and liquid injected into the higher temperature second stage or chamber causing rapid vaporization of the liquid. The vapor expands and drives a piston in a cylinder. The piston is connected by a rod and a crank to a flywheel, which turns a generator. Detectors sense the position of the piston and open a port when the piston has traveled to its fullest extent causing exhausted vapor to be condensed and returned to the first chamber. A portion of the returned condensed liquid is used for injection into a second high temperature chamber. A low boiling point liquid such as freon, alcohol, or ether may be used. By freon it is meant one of a group of polyhalogenated derivatives of methane and ethane containing fluorine and, in most cases, chlorine or bromine.
Accordingly it is an object of the presence invention to provide an efficient heat engine.
It is another object of the present invention to use a relatively low temperature heat source in the first chamber.
It is an advantage of the present intention that it responses relatively quickly.
It is another advantage of the present invention that it uses a relatively low temperature heat source.
It is a feature of the presence invention that a second high temperature heat chamber is used.
It is another feature of the present intention that a low boiling point liquid is used.
These and other objects, advantages, and features will become readily apparent in view of the following description.


REFERENCES:
patent: 3599425 (1971-08-01), Lewis
patent: 3956894 (1976-05-01), Tibbs
patent: 4077214 (1978-03-01), Burke, Jr. et al.
patent: 4220005 (1980-09-01), Cutts
patent: 5035115 (1991-07-01), Ptasinski
patent: 5983640 (1999-11-01), Czaja

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