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US 9,316,101 B2Granted
Hybrid vehicles with radial engines
OwnerTai Dung Nguyen, Tue Nguyen +1inventors
InventorsTai Dung Nguyen, Tue Nguyen, Donald James Duncalf
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Abstract
A radial cam engine with an optimized cam configuration can provide improve performance over crankshaft internal combustion engines. The cam configuration can include a flat-top or flat bottom piston motion, multiple lobe cam configurations, matching piston force with torque/force ratio in combustion phase, asymmetry piston motions for improved power transfer during combustion phase, and/or offset piston and cam configurations. The radial cam engine can be used in vehicles, such as hybrid vehicles.
Claims19
An engine comprising
- a piston,
- a cam coupled to a camshaft,
- wherein the cam is configured to provide a substantially flat-bottom piston motion,
- wherein the substantially flat-bottom piston motion comprises an x3 or higher polynomial dependency.
1 more element
An engine comprising
- a piston,
- a cam coupled to a camshaft,
- wherein the piston is coupled to the cam to provide a piston motion with substantially no side force on the piston,
- wherein the cam comprises three or more lobes.
1 more element
An engine comprising
- a piston,
- a cam coupled to a camshaft, wherein the cam is configured to rotate around a rotational center,
- wherein the piston is coupled to the cam to provide a piston motion with substantially no side force on the piston,
- wherein the piston motion is offset from the rotational center of the cam, characterized by a line extended from the piston motion does not pass through the rotational center.
1 more element
Dependencies are inferred from the claim text.