Patents by Inventor Chi Keng Chen

Chi Keng Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Six-stroke and eight-stroke internal combustion engines
    Patent number: 10138805
    Abstract: A method for improving the efficiency of an internal combustion engine having a cycle, for each cylinder of the engine, including intake, compression, power, and exhaust strokes, comprises inserting two strokes into the cycle in addition to the intake, compression, power, and exhaust strokes. No material other than air is introduced into each cylinder during either of the additional two strokes. A high efficiency internal combustion engine system having a cycle, for each cylinder of the engine, including intake, compression, power, and exhaust strokes, comprises a cylinder, a piston, an air intake device, a fuel injector, an exhaust valve device, a camshaft, and an electronic control unit (ECU) configured to control cylinder operation such that two strokes, in addition to the intake, compression, power, and exhaust strokes, are inserted into the cycle. No material other than air is introduced into each cylinder during either of the additional two strokes.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: November 27, 2018
    Inventor: Chi Keng Chen
  • Six-Stroke and Eight-Stroke Internal Combustion Engines
    Publication number: 20180038275
    Abstract: A method for improving the efficiency of an internal combustion engine having a cycle, for each cylinder of the engine, including intake, compression, power, and exhaust strokes, comprises inserting two strokes into the cycle in addition to the intake, compression, power, and exhaust strokes. No material other than air is introduced into each cylinder during either of the additional two strokes. A high efficiency internal combustion engine system having a cycle, for each cylinder of the engine, including intake, compression, power, and exhaust strokes, comprises a cylinder, a piston, an air intake device, a fuel injector, an exhaust valve device, a camshaft, and an electronic control unit (ECU) configured to control cylinder operation such that two strokes, in addition to the intake, compression, power, and exhaust strokes, are inserted into the cycle. No material other than air is introduced into each cylinder during either of the additional two strokes.
    Type: Application
    Filed: March 3, 2017
    Publication date: February 8, 2018
    Inventor: Chi Keng Chen