Patents Assigned to John A. McDougal
  • Internal combustion engine ignition system and cleaning device
    Patent number: 5133322
    Abstract: An apparatus for electrically controlling the spark advance of selected cylinders of a multicylinder engine so that the spark of the selected cylinders is advanced beyond others of the cylinders. For example, the selected cylinders may be advanced beyond normal operational advance to increase combustion chamber temperatures and pressures for a relatively short period so as to clean the surfaces of the combustion chamber. The cylinders which are advanced are changed in sequence or at random so that all of the cylinders are cleaned. The system may also be used to control the spark advance of the cylinders to provide differing advances for the respective cylinders to accommodate differences in operational conditions at the cylinders.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: July 28, 1992
    Assignee: John A. McDougal
    Inventors: John A. McDougal, John W. Lennington
  • Internal combustion engine ignition system and cleaning device
    Patent number: 5085192
    Abstract: An apparatus for electrically controlling the spark advance of selected cylinders of a multicylinder engine so that the spark of the selected cylinders is advanced beyond others of the cylinders. For example, the selected cylinders may be advanced beyond normal operational advance to increase combustion chamber temperatures and pressures for a relatively short period so as to clean the surfaces of the combustion chamber. The cylinders which are advanced are changed in sequence or at random so that all of the cylinders are cleaned. The system may also be used to control the spark advance of the cylinders to provide differing advances for the respective cylinders to accommodate differences in operational conditions at the cylinders.
    Type: Grant
    Filed: June 4, 1991
    Date of Patent: February 4, 1992
    Assignee: John A. McDougal
    Inventors: John A. McDougal, John W. Lennington
  • Internal combustion engine ignition system and cleaning device
    Patent number: 5029567
    Abstract: An apparatus for electrically controlling the spark advance of selected cylinders of a multicylinder engine so that the spark of the selected cylinders is advanced beyond others of the cylinders. For example, the selected cylinders may be advanced beyond normal operational advance to increase combustion chamber temperatures and pressures for a relatively short period so as to clean the surfaces of the combustion chamber. The cylinders which are advanced are changed in sequence or at random so that all of the cylinders are cleaned. The system may also be used to control the spark advance of the cylinders to provide differing advances for the respective cylinders to accommodate differences in operational conditions at the cylinders.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: July 9, 1991
    Assignee: John A. McDougal
    Inventors: John A. McDougal, John W. Lennington
  • Internal combustion engine ignition system and cleaning device
    Patent number: 4993371
    Abstract: An apparatus for electrically controlling the spark advance of selected cylinders of a multicylinder engine so that the spark of the selected cylinders is advanced beyond others of the cylinders. For example, the selected cylinders may be advanced beyond normal operational advance to increase combustion chamber temperatures and pressures for a relatively short period so as to clean the surfaces of the combustion chamber. The cylinders which are advanced are changed in sequence or at random so that all of the cylinders are cleaned. The system may also be used to control the spark advance of the cylinders to provide differing advances for the respective cylinders to accommodate differences in operational conditions at the cylinders.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: February 19, 1991
    Assignee: John A. McDougal
    Inventors: John A. McDougal, John W. Lennington
  • Internal combustion engine ignition system and cleaning device
    Patent number: 4960093
    Abstract: An apparatus for electrically controlling the spark advance of selected cylinders of a multicylinder engine so that the spark of the selected cylinders is advanced beyond others of the cylinders. For example, the selected cylinders may be advanced normal operational advance to increase combustion chamber temperatures and pressures for a relatively short period so as to clean the surfaces of the combustion chamber. The cylinders which are advanced are changed in sequence or at random so that all of the cylinders are cleaned. The system may also be used to control the spark advance of the cylinders to provide differing advances for the respective cylinders to accommodate differences in operational conditions at the cylinders.
    Type: Grant
    Filed: February 14, 1989
    Date of Patent: October 2, 1990
    Assignee: John A. McDougal
    Inventors: John A. McDougal, John W. Lennington
  • Internal combustion engine ignition system
    Patent number: 4809662
    Abstract: An apparatus for electrically controlling the spark advance of selected cylinders of a multicylinder engine so that the spark of the selected cylinders is advanced beyond others of the cylinders. For example, the selected cylinders may be advanced beyond normal operational advance to increase combustion chamber temperatures and pressures for a relatively short period so as to clean the surfaces of the combustion chamber. The cylinders which are advanced are changed in sequence or at random so that all of the cylinders are cleaned. The system may also be used to control the spark advance of the cylinders to provide differing advances for the respective cylinders to accommodate differences in operational conditions at the cylinders.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: March 7, 1989
    Assignee: John A. McDougal
    Inventors: John A. McDougal, John W. Lennington
  • Internal combustion engine ignition system
    Patent number: 4718381
    Abstract: An apparatus for electrically controlling the spark advance of selected cylinders of a multicylinder engine so that the spark of the selected cylinders is advanced beyond others of the cylinders. For example, the selected cylinders may be advanced beyond normal operational advance to increase combustion chamber temperatures and pressures for a relatively short period so as to clean the surfaces of the combustion chamber. The cylinders which are advanced are changed in sequence or at random so that all of the cylinders are cleaned. The system may also be used to control the spark advance of the cylinders to provide differing advances for the respective cylinders to accommodate differences in operational conditions at the cylinders.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: January 12, 1988
    Assignee: John A. McDougal
    Inventors: John A. McDougal, John W. Lennington
  • Internal combustion engine ignition system
    Patent number: 4471737
    Abstract: An apparatus for electrically controlling the spark advance of selected cylinders of a multicylinder engine so that the spark of the selected cylinders is advanced beyond others of the cylinders. For example, the selected cylinders may be advanced beyond normal operational advance to increase combustion chamber temperatures and pressures for a relatively short period so as to clean the surfaces of the combustion chamber. The cylinders which are advanced are changed in sequence or at random so that all of the cylinders are cleaned. The system may also be used to control the spark advance of the cylinders to provide differing advances for the respective cylinders to accommodate differences in operational conditions at the cylinders.
    Type: Grant
    Filed: May 4, 1982
    Date of Patent: September 18, 1984
    Assignee: John A. McDougal
    Inventors: John A. McDougal, John W. Lennington
  • Internal combustion engine ignition system
    Patent number: 4257373
    Abstract: An apparatus for electrically controlling the spark advance of selected cylinders of a multicylinder engine so that the spark of the selected cylinders is advanced beyond others of the cylinders. For example, the selected cylinders may be advanced beyond normal operational advance to increase combustion chamber temperatures and pressures for a relatively short period so as to clean the surfaces of the combustion chamber. The cylinders which are advanced are changed in sequence or at random so that all of the cylinders are cleaned. The system may also be used to control the spark advance of the cylinders to provide differing advances for the respective cylinders to accommodate differences in operational conditions at the cylinders.
    Type: Grant
    Filed: August 16, 1978
    Date of Patent: March 24, 1981
    Assignee: John A. McDougal
    Inventors: John A. McDougal, John W. Lennington