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US 8,770,158 B1Granted
Hybrid vehicles with radial engines
AssigneeThien Ton Consulting Services Co., Ltd.
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.
Claims17
A hybrid vehicle comprising
- an electric motor configured to drive the hybrid vehicle,
- wherein the electric motor is powered by an battery;
- a radial cam internal combustion engine configured to drive the hybrid vehicle,
- wherein the radial cam engine is powered by a non-battery power source,
- wherein the radial cam engine comprises a piston,
- wherein the radial cam engine comprises a cam coupled to a camshaft,
- wherein the cam is configured to provide a substantially flat-top piston motion,
- wherein the cam is configured to provide a substantially flat-bottom piston motion,
- wherein the cam is configured to provide a force profile of the piston that is substantially similar to a torque/force ratio profile of the camshaft at least in a first duration, wherein the first duration is between a top-dead-center position of the piston to an inflection point of the piston motion.
6 more elements
A hybrid vehicle comprising
- an electric motor configured to drive the hybrid vehicle,
- wherein the electric motor is powered by an battery;
- a radial cam internal combustion engine configured to drive the hybrid vehicle,
- wherein the radial cam engine is powered by a non-battery power source,
- wherein the radial cam engine comprises a piston,
- wherein the radial cam engine comprises a cam coupled to a camshaft,
- wherein the cam is configured to provide a substantially flat-top piston motion,
- wherein the cam is configured to provide a substantially flat-bottom piston motion,
- wherein the cam is configured to provide a force profile of the piston that is substantially similar to a torque/force ratio profile of the camshaft at least in a first duration, wherein the first duration is between a top-dead-center position of the piston to an inflection point of the piston motion,
- wherein the force profile of the piston comprises a profile that is zero at the top-dead-center position and at the inflection point,
- wherein the cam is configured to provide an asymmetric piston motion;
- a controller for switching control of the hybrid vehicle between the electric motor and the radial cam engine.
9 more elements
Dependencies are inferred from the claim text.