# US 4,392,460 A · Parallel inherently balanced rotary valve internal combustion engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,392,460 A - Document ID: US4392460A - Status: Granted - Kind: A - Application number: 06/132,606 - Filed: 1980-03-21 - Granted: 1983-07-12 - Earliest claimed: 1980-03-21 - Inventors: Thomas V. Williams - Web page: https://patentgrep.com/patent/US4392460A ## CPC - F02B 73/00: Combinations of two or more engines, not otherwise provided for - F01L 7/029: {having the rotational axis of the valve parallel to the cylinder axis} - F02B 3/06: with compression ignition (compression ignition engines using air or gas for blowing fuel into compressed air in cylinder F02B13/02) - F02B 2075/027: {four} - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ## Abstract An internal combustion engine having banks of oppositely disposed cylinders is disclosed having a rotary valve for each bank which directs the flow to supply the inlet air and to dispose to the exhaust gases. Each of the rotary valves can be liquid cooled and is synchronized to time the inlet and exhaust gas to and from the proper cylinders. A fuel injection system provides the fuel to stratify its change. The fuel supply to any cylinder can be controlled or terminated during the low power requirement of the engine, such as when the engine is operating at reduced power or when the engine is idling. The engine can be built in any number of cylinders, but the four and eight cylinder combination makes for the most compact design. ## Claims ### Claim 1 An internal combustion engine comprising a first plurality of cylinders, each cylinder comprising a head, a piston, an inlet port and an exhaust port; a second plurality of cylinders, each cylinder comprising a head, a piston, an inlet port and an exhaust port; a first rotary fuel valve adjacent to said first plurality of cylinders and a second rotary valve adjacent to the said second plurality of cylinders, each valve having a valve member mounted for rotation about an axis parallel to its adjacent cylinders for feeding a fuel-air mixture to each said cylinder, each valve member having a fuel-air passage terminating in an outlet port for rotating alignment with a cylinder head of one of its adjacent cylinders for feeding a fuel-air mixture into each said cylinder inlet port, each valve member having an exhaust passage terminating in an exhaust inlet port for rotating alignment with a cylinder head of another adjacent cylinder for exhausting gases from the said cylinder exhaust port; crankshaft means coupled to said pistons for rotation relative to the cylinders, the crankshaft means comprising first and second crankshafts, at least one piston from each of the said first and second pluralities of cylinders being connected to each crankshaft; a fuel injector means communicating with each fuel-air passage in all rotary positions of each valve member to feed a fuel-air mixture into each fuel-air passage; drive means for rotating the valve members continuously about their respective longitudinal axes; and gear means connected to rotate simultaneously the first and second rotary valves, the said gear means being adapted to rotate the first and second rotary valves in opposite directions. ### Claim 2 (depends on 1) The internal combustion engine of claim 1 wherein the first and second crankshafts are one hundred and eighty degrees out of phase. ### Claim 3 (depends on 1) The internal combustion engine of claim 1 and means for synchronizing the drive means for the said valve members with the said fuel injector means. ### Claim 4 (depends on 1) The internal combustion engine of claim 1 wherein at least one group of cylinders comprises a compression ignition system for use with a diesel fuel. ### Claim 5 (depends on 1) The internal combustion engine of claim 1 wherein each crankshaft comprises a plurality of cranks and wherein one piston from the first plurality and one piston from the second plurality is connected to a common crank. ### Claim 6 (depends on 5) The internal combustion engine of claim 5 wherein the said piston from said first plurality is connected to be one hundred and eighty degrees out of phase with the said piston from the second plurality. ### Claim 7 (depends on 1) The internal combustion engine of claim 1 wherein the number of cylinders in the second plurality is equal to the number of cylinders in the first plurality. ### Claim 8 (depends on 7) The internal combustion engine of claim 7 wherein the number of cylinders in each plurality is four. ### Claim 9 (depends on 1) The internal combustion engine of claim 1 and means defining a coolant chamber in each valve member for passage of a coolant therethrough. ### Claim 10 (depends on 9) The internal combustion engine of claim 9 wherein the coolant chamber is interposed between the fuel-air passage and the exhaust passage. ### Claim 11 (depends on 1) The internal combustion engine of claim 1 wherein each of said cylinders is generally horizontally disposed. ### Claim 12 (depends on 11) The internal combustion engine of claim 11 wherein each of said rotary valve members is horizontally disposed. ### Claim 13 (depends on 12) The internal combustion engine of claim 12 wherein the axis of rotation of the crankshafts are generally perpendicular to the axis of rotation of the rotary valve members.