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SYSTEM FOR MINIMIZING INTERNAL COMBUSTION

ENGINE POLLUTION EMISSION

NASA Case No. NPO-13402

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Australia, Canad, France,
Great Britain, Italy, Japan,
Sweden, West Germany

NASA Pasadena Office
Attn: Patent Counsel
Mail Code: 180-601
4800 Oak Grove Drive
Pasadena, CA 91103
U.S.A.

(Corresponding U.S. Patent-Application Pending)

It is well known that the emitted pollutants of an internal combustion engine are considerably reduced as the fuel-to-air ratio is reduced. However, as the fuel-to-air ratio is reduced, a point is soon reached where the mixture is no longer flammable. It has been found, though, that an ultra lean mixture can be made flammable if mixed with a hydrogen rich gas. This invention is a mixing device which simultaneously atomizes liquid fuel, mixes this fuel with an optimal quantity of hydrogen and combines this mixture with a prescribed quantity of air. A throttling mechanism controls the fuel delivery to the engine and also limits the fuel to air equivalence ratio to a predetermined upper boundary to inhibit the production of air pollutants and to a lower boundry which is above the lean flammability of the mixture.

20 p

28.

COMPUTER INTERFACE SYSTEM

NASA Case No. NPO-13428-1

NPO-13447-1

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France, Great Britain,
Japan, West Germany

NASA Pasadena Office
Attn: Patent Counsel
Mail Code: 180-601
4800 Oak Grove Drive
Pasadena, CA 91103
U.S.A.

(Corresponding U.S. Patent-Application Pending)

Computers and related equipment must be synchronized with one another in order to successfully transmit and receive control signals and data. If the computers are asynchronous, special means are required to transfer data and this invention relates to an interface logic system which, with a minimum of components and interconnecting lines, verifies that valid information transfer control signals exist and assures proper completion of a data strobe pulse. Thus, data transfer is effected without the requirement of both computers being on a master clock.

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BRUSHLESS DC MOTOR WITH WOUND ROTOR

NASA Case No. NPO-13437-1

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Australia, Belgium, Canada,
France, Great Britain, Italy,
Japan, Netherlands, Sweden,
West Germany

NASA Pasadena Office
Attn: Patent Counsel
Mail Code: 180-601
4800 Oak Grove Drive
Pasadena, CA 91103
U.S.A.

(Corresponding U.S. Patent-Application Pending)

Brushless dc motors are gradually becoming competitive with the convential dc motor. In this invention the rotor is an electromagnet energized through a transformer having its primary winding stationary on the stator, and its secondary winding mounted on the rotor. Controlled dc current applied to the motor is converted to ac current for inductive coupling to the rotating secondary winding. The ac current in the secondary winding is rectified to provide dc current to the rotor field coil.

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COILS' 29

DC POWER

SOURCE

IMPROVED HYDROGEN-RICH GAS GENERATOR

NASA Case No. NPO-13464-1

Address inquiries to:

Australia, Canada, France,
Great Britain, Italy,
Sweden, West Germany

NASA Pasadena Office
Attn: Patent Counsel
Mail Code: 180-601
4800 Oak Grove Drive
Pasadena, CA 91103

(Corresponding U.S. Patent-Application Pending)

While the invention of NASA Case No. NPO-13342 does provide hydrogen rich gases, it also has a tendency to form carbon. Since one of the purposes of the hydrogen generator is to provide hydrogen gas to be used in an internal combustion engine, the presence of the carbon which is generated is undesirable since it tends to clog up the induction system of the internal combustion engine. This invention minimizes the carbon output of a hydrogen rich generator by preheating the input air, then injecting atomized water into the preheated air stream and after some more preheating, the resulting steam-air mixture is introduced into the flame zone. An alternate method is to atomize the water and introduce it directly into the flame zone.

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HIGH VOLTAGE, HIGH CURRENT
SCHOTTKY BARRIER SOLAR CELL

NASA Case No. NPO-13482-1

Address inquiries to:

Australia, Canada, France, Great Britain, Italy, Japan, Netherlands, Sweden, West Germany

NASA Pasadena Office
Attn: Patent Counsel
Mail Code: 180-601
4800 Oak Grove Drive
Pasadena, CA 91103
U.S.A.

(Corresponding U.S. Patent-Application Pending)

Extensive research is being conducted to find more efficient solar cells. One such effort is the use of GaAs and this invention is a Schottky barrier solar cell consisting of a layer of wide band gap semiconductor material such as AlGaAs on which a very thin film of semi-transparent metal is deposited to form a Schottky barrier. The layer of the wide band gap semiconductor material is on top of a layer of narrow band gap semiconductor material. The first layer is very efficient for converting the energy of high energy photons and the second layer is efficient in converting the energy of the lower energy photons.

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