Abstract: A positive displacement rotary system may include a main rotor and a slotted rotor. The main rotor can include an interior cavity and a fixed vane (or blade) that is attached to the peripheral and side walls of that cavity. The slotted rotor is positioned within the main rotor interior and includes a slot for the main rotor blade. The main and slotted rotors rotate about parallel axes that are offset from one another. As the rotors turn, separate chambers are formed between the blade and an inter-rotor seal, with the inter-rotor seal located at or near a rolling contact between the outer surface of the slotted rotor and an inner perimeter wall of the main rotor cavity. The separate chambers contract and expand as the rotors rotate.

Abstract: A positive displacement rotary system may include a main rotor and a slotted rotor. The main rotor can include an interior cavity and a fixed vane (or blade) that is attached to the peripheral and side walls of that cavity. The slotted rotor is positioned within the main rotor interior and includes a slot for the main rotor blade. The main and slotted rotors rotate about parallel axes that are offset from one another. As the rotors turn, separate chambers are formed between the blade and an inter-rotor seal, with the inter-rotor seal located at or near a rolling contact between the outer surface of the slotted rotor and an inner perimeter wall of the main rotor cavity. The separate chambers contract and expand as the rotors rotate.

Abstract: A positive displacement rotary system may include a main rotor and a slotted rotor. The main rotor can include an interior cavity and a fixed vane (or blade) that is attached to the peripheral and side walls of that cavity. The slotted rotor is positioned within the main rotor interior and includes a slot for the main rotor blade. The main and slotted rotors rotate about parallel axes that are offset from one another. As the rotors turn, separate chambers are formed between the blade and an inter-rotor seal, with the inter-rotor seal located at or near a rolling contact between the outer surface of the slotted rotor and an inner perimeter wall of the main rotor cavity. The separate chambers contract and expand as the rotors rotate.

Abstract: A positive displacement rotary system may include a main rotor and a slotted rotor. The main rotor can include an interior cavity and a fixed vane (or blade) that is attached to the peripheral and side walls of that cavity. The slotted rotor is positioned within the main rotor interior and includes a slot for the main rotor blade. The main and slotted rotors rotate about parallel axes that are offset from one another. As the rotors turn, separate chambers are formed between the blade and an inter-rotor seal, with the inter-rotor seal located at or near a rolling contact between the outer surface of the slotted rotor and an inner perimeter wall of the main rotor cavity. The separate chambers contract and expand as the rotors rotate.

Abstract: A four-cycle, fuel lubricated, internal combustion engine system suited for a vehicle includes a fuel tank containing fuel at a remote location from the engine, a first fluid path for transporting fuel to the lubrication system of the engine, and a second fluid path for transporting fuel to said combustion system of the engine. In this way, the engine's fuel serves as the lubricant and the combustive agent. Certain load bearing surfaces of the engine can include a hard material based on borides, carbides and nitrides, a super-hard steel, a self-lubricating material, or a diamond-like coating. The fuel can be one of liquefied petroleum gas, bio-diesel, natural gas, biogas, methanol, Fischer-Tropsch fuel, ethanol, n-pentene, hexane, n-heptane, isooctane, or hydrogen. Also, additives such as molybdenum disulfide, graphite, soybean derived oil, canola oil, polytetrafloeraethylene (PTFE), zinc dialkyldithiophosphate, polyalphaolefin, dibasic organic esters, or mineral oil can be added to the fuel.

Abstract: A four-cycle, fuel lubricated, internal combustion engine system suited for a vehicle includes a fuel tank containing fuel at a remote location from the engine, a first fluid path for transporting fuel to the lubrication system of the engine, and a second fluid path for transporting fuel to said combustion system of the engine. In this way, the engine's fuel serves as the lubricant and the combustive agent. Certain load bearing surfaces of the engine can include a hard material based on borides, carbides and nitrides, a super-hard steel, a self-lubricating material, or a diamond-like coating. The fuel can be one of liquefied petroleum gas, bio-diesel, natural gas, biogas, methanol, Fischer-Tropsch fuel, ethanol, n-pentene, hexane, n-heptane, isooctane, or hydrogen. Also, additives such as molybdenum disulfide, graphite, soybean derived oil, canola oil, polytetrafloeraethylene (PTFE), zinc dialkyldithiophosphate, polyalphaolefin, dibasic organic esters, or mineral oil can be added to the fuel.

Abstract: A four-cycle, fuel lubricated, internal combustion engine system suited for a vehicle includes a fuel tank containing fuel at a remote location from the engine, a first fluid path for transporting fuel to the lubrication system of the engine, and a second fluid path for transporting fuel to said combustion system of the engine. In this way, the engine's fuel serves as the lubricant and the combustive agent.