Invent Horsepower - Business Plan
Dual Pressure Intake Engine Using a Double Acting Valve
I own a utility patent (#5,782,215) on a double acting valve, usually referred to as the Uniport Valve. An application for this valve is the Dual Pressure Intake Engine, which has a unique induction system. During the beginning of the intake stroke, the cylinder is first filled with a low pressure air, then near the end of the intake stroke a higher pressure air 'tops off' the cylinder via a different intake runner. Both intake runners are controlled by the same Uniport Valve. This allows both flows to pass through the same port. The exhaust gas will be controlled by a conventional poppet valve.
The web site www.inventhp.com suggests other engine and compressor applications for the Uniport Valve. Below are some reasons why it would be most cost effective to proceed with the Dual Pressure Intake Engine Project first.
The following link: Dual Pressure Intake Engine Computer Simulation will direct one to the first page of a string of many that cover: assumptions, graphs, flow diagrams, tables and other information regarding a computer simulation done for a large diesel engine, which has a similar induction system to the one I propose to build. In that string of links you will find a page titled: Observations and Notes, which lists some of the advantages of the Dual Pressure Intake Engine. A similar list has been provided below with an added item 'D' which identifies items that might be reduced or eliminated if this engine cycle were used.
A rudimentary computer simulation for a large diesel engine, which tried to account for advantages 1, 2, and 3 listed above, showed an increase in power by 6.5% while improving the thermal efficiency by .5% at an engine speed of 1000 rpm. If valve timing was adjusted to maximize thermal efficiency for the test engine and the new engine, then the Dual Pressure Intake Engine's thermal efficiency was nearly 1% better than the “conventional model”, over the whole range of engine speeds. This did reduce power, however. The reductions ranged from .6% at 800 rpm to 2.5% at 1100 rpm. Remember, the simulation that computed these figures did not account for the increased kinetic action, or advantage 'E', that a Dual Pressure Intake Engine would induce.
Over the next year, it is my goal to build a small single cylinder engine that could demonstrate the engine cycles of both a “Dual Pressure Intake Engine” and the “Producer Gas Engine”.
My plan is to design the prototype around a SI engine vs. a diesel engine. This will make it cheaper and easier to buy an engine for this project. It should also be easier to build the engine head around a SI engine.
In an attempt to simplify the project it is the intention to supply the boost for the engine from an external source such as an electric driven compressor. At a later time a supercharger could be added. In any case a single cylinder engine would not be a good application to use a turbocharger. That aside, when it comes time to test the 'Producer Gas Engine', it is the goal to show that a supercharger or turbocharger is not needed to boost the specific power of an engine.
The valves will be mechanically actuated. In the future, however, a hydraulic actuation system might be a good project to further develop the Uniport Valve. The animated gif file found on my web site, Dual Pressure Intake Engine Animation shows a desmodromic actuation system. For some applications this might be advantages, but at this time the plan is to replace one of the cams with a torsion spring or torsion bar.
Once an engine is made the actuation system can be analyzed and adjusted if necessary. Dyno tests, flow tests and emission tests will be performed. Later a clear cylinder can be substituted so that flow patterns, swirl and turbulence can be studied.
Engine and machining costs 12,000
Engine tests (dynamo meter and flow tests) 2,000
Office expenses 500
Proposal Team Experience
Some of the things that I have done to advance this “Double Acting Valve”
Made a Mock-up of a Valve in a machine shop class for which a patent was granted
Learned CNC skills that would help understand design concerns better
Made myself familiar with surrounding machine shops
Developed different actuation systems for the Uniport Valve
Made contacts with academics involved in internal combustion engine research
Programmed an engine simulation that tested the “Dual Pressure Intake Engine”
Designed a head for a motorcycle engine that used the Uniport Valve
Created animations of engines and compressors that use the Uniport Valve