Patents by Inventor John M. Clarke

John M. Clarke 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).

  • Publication number: 20160222873
    Abstract: A highly-efficient, yet simply constructed internal combustion engine includes an intake cylinder to accommodate intake and pre-compression of an oxidizing agent, a combustion cylinder to accommodate a further compression of the oxidizing agent, an injection and ignition of fuel, and a partial expansion of combustion gases produced by the ignition of fuel; and an exhaust cylinder to accommodate a further expansion of the combustion gases and subsequent exhausting of the further expanded combustion gases. A reciprocating piston is inside each of the intake, combustion and exhaust cylinders and a crankshaft is coupled to the reciprocating pistons. A first transfer passage facilitates flow of the pre-compressed oxidizing agent from the intake cylinder to the combustion cylinder and a second transfer passage facilitates flow of the partially-expanded combustion gases from the combustion cylinder to the exhaust cylinder.
    Type: Application
    Filed: April 11, 2016
    Publication date: August 4, 2016
    Inventor: John M. Clarke
  • Patent number: 9334844
    Abstract: A highly-efficient, yet simply constructed internal combustion engine includes an intake cylinder to accommodate intake and pre-compression of an oxidizing agent, a combustion cylinder to accommodate a further compression of the oxidizing agent, an injection and ignition of fuel, and a partial expansion of combustion gases produced by the ignition of fuel; and an exhaust cylinder to accommodate a further expansion of the combustion gases and subsequent exhausting of the further expanded combustion gases. A reciprocating piston is inside each of the intake, combustion and exhaust cylinders and a crankshaft is coupled to the reciprocating pistons. A first transfer passage facilitates flow of the pre-compressed oxidizing agent from the intake cylinder to the combustion cylinder and a second transfer passage facilitates flow of the partially-expanded combustion gases from the combustion cylinder to the exhaust cylinder.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: May 10, 2016
    Assignee: Motiv Engines LLC
    Inventor: John M. Clarke
  • Publication number: 20150090224
    Abstract: A highly-efficient, yet simply constructed internal combustion engine includes an intake cylinder to accommodate intake and pre-compression of an oxidizing agent, a combustion cylinder to accommodate a further compression of the oxidizing agent, an injection and ignition of fuel, and a partial expansion of combustion gases produced by the ignition of fuel; and an exhaust cylinder to accommodate a further expansion of the combustion gases and subsequent exhausting of the further expanded combustion gases. A reciprocating piston is inside each of the intake, combustion and exhaust cylinders and a crankshaft is coupled to the reciprocating pistons. A first transfer passage facilitates flow of the pre-compressed oxidizing agent from the intake cylinder to the combustion cylinder and a second transfer passage facilitates flow of the partially-expanded combustion gases from the combustion cylinder to the exhaust cylinder.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 2, 2015
    Applicant: Motiv Engines LLC
    Inventor: John M. Clarke
  • Patent number: 8813694
    Abstract: An engine has an engine casing with one or more surfaces that define a first substantially tubular coolant passage (e.g., a coolant inlet passage) with an open end that opens inside the engine casing. A first piston assembly is inside the engine casing and configured to reciprocate relative to the engine casing when the engine is operating. The first piston assembly has one or more surfaces that define a piston coolant jacket inside the first piston assembly. The piston coolant jacket has a first opening at an outer surface of the first piston assembly. A first fluid communication conduit extends between the engine casing and the first piston assembly and has a first end that is rigidly coupled to the first opening in the piston coolant jacket and a second end that extends through the open end of the first substantially tubular coolant passage in the engine casing.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: August 26, 2014
    Assignee: Motiv Engines, LLC
    Inventor: John M. Clarke
  • Patent number: 8763593
    Abstract: An engine has a stationary first body portion with one or more surfaces that define a portion of a fluid flow path through the engine. The stationary first body portion has a substantially cylindrical outer surface. A first piston assembly is configured to reciprocate relative to the stationary first body portion and to accommodate one or more second piston assemblies reciprocating inside and relative to the first piston assembly. The first piston assembly has an extension portion. The extension portion has a substantially cylindrical inner surface that defines a space to receive the stationary first body portion. One or more sealing elements are between the substantially cylindrical outer surface of the stationary first body portion and the extension portion of the first piston assembly.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: July 1, 2014
    Assignee: Motiv Engines, LLC
    Inventor: John M. Clarke
  • Patent number: 8671922
    Abstract: An engine includes an engine casing and a first piston configured to reciprocate relative to the engine casing. The first piston has a wall that defines a substantially cylindrical chamber. One or more second pistons are configured to reciprocate inside the substantially cylindrical chamber. A combustion chamber intake port and a combustion chamber exhaust port extend through the wall. A shutter is outside the wall and is movable between a first position substantially blocking fluid flow through the combustion chamber exhaust port but not blocking fluid flow through the combustion chamber intake port and a second position substantially blocking fluid flow through the combustion chamber intake port but not blocking flow through the combustion chamber exhaust port. An actuator causes the shutter to move between the first position and the second position in response to the first piston reciprocating relative to the engine casing.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: March 18, 2014
    Assignee: Motiv Engines LLC
    Inventor: John M. Clarke
  • Publication number: 20130319368
    Abstract: An engine includes an engine casing and a first piston configured to reciprocate relative to the engine casing. The first piston has a wall that defines a substantially cylindrical chamber. One or more second pistons are configured to reciprocate inside the substantially cylindrical chamber. A combustion chamber intake port and a combustion chamber exhaust port extend through the wall. A shutter is outside the wall and is movable between a first position substantially blocking fluid flow through the combustion chamber exhaust port but not blocking fluid flow through the combustion chamber intake port and a second position substantially blocking fluid flow through the combustion chamber intake port but not blocking flow through the combustion chamber exhaust port. An actuator causes the shutter to move between the first position and the second position in response to the first piston reciprocating relative to the engine casing.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 5, 2013
    Applicant: Motiv Engines LLC
    Inventor: John M. Clarke
  • Publication number: 20130319385
    Abstract: An engine has a stationary first body portion with one or more surfaces that define a portion of a fluid flow path through the engine. The stationary first body portion has a substantially cylindrical outer surface. A first piston assembly is configured to reciprocate relative to the stationary first body portion and to accommodate one or more second piston assemblies reciprocating inside and relative to the first piston assembly. The first piston assembly has an extension portion. The extension portion has a substantially cylindrical inner surface that defines a space to receive the stationary first body portion. One or more sealing elements are between the substantially cylindrical outer surface of the stationary first body portion and the extension portion of the first piston assembly.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 5, 2013
    Applicant: Motiv Engines LLC
    Inventor: John M. Clarke
  • Publication number: 20130319351
    Abstract: An engine has an engine casing with one or more surfaces that define a first substantially tubular coolant passage (e.g., a coolant inlet passage) with an open end that opens inside the engine casing. A first piston assembly is inside the engine casing and configured to reciprocate relative to the engine casing when the engine is operating. The first piston assembly has one or more surfaces that define a piston coolant jacket inside the first piston assembly. The piston coolant jacket has a first opening at an outer surface of the first piston assembly. A first fluid communication conduit extends between the engine casing and the first piston assembly and has a first end that is rigidly coupled to the first opening in the piston coolant jacket and a second end that extends through the open end of the first substantially tubular coolant passage in the engine casing.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 5, 2013
    Applicant: Motiv Engines LLC
    Inventor: John M. Clarke
  • Patent number: 8381691
    Abstract: An engine includes a first piston with surfaces that define a substantially cylindrical chamber inside the first piston and a passage into the substantially cylindrical chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical chamber and to define, in cooperation with the substantially cylindrical chamber, a combustion chamber. A fuel injector extends at least partially through the passage in the first piston to inject fuel into the combustion chamber. The first piston is arranged to move in a reciprocating manner relative to the fuel injector.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: February 26, 2013
    Assignee: Motiv Engines, LLC
    Inventor: John M. Clarke
  • Publication number: 20110100334
    Abstract: An engine includes a first piston with surfaces that define a substantially cylindrical chamber inside the first piston and a passage into the substantially cylindrical chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical chamber and to define, in cooperation with the substantially cylindrical chamber, a combustion chamber. A fuel injector extends at least partially through the passage in the first piston to inject fuel into the combustion chamber. The first piston is arranged to move in a reciprocating manner relative to the fuel injector.
    Type: Application
    Filed: November 3, 2009
    Publication date: May 5, 2011
    Applicants: Motiv Engines LLC, National Institute for Strategic Technology Aquisition and Commercialization
    Inventor: John M. Clarke
  • Patent number: 7210640
    Abstract: An apparatus and method for multi-mode fuel injection is disclosed. A sleeve is disposed about a fuel injector tip movable between a first and second position and wherein the sleeve is capable of impinging the fuel spray as it enters into the combustion chamber. By impinging the fuel spray, different spray profiles or plumes can be obtained allowing the fuel injector to inject in different modes, including homogenous charge compression ignition.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: May 1, 2007
    Assignee: Caterpillar Inc
    Inventors: John M. Clarke, Kevin P. Duffy, Ronald P. Maloney, Devin C. Tornow
  • Patent number: 6668788
    Abstract: The present invention relates generally to the field of homogeneous charge compression engines. In these engines, fuel is injected upstream or directly into the cylinder when the power piston is relatively close to its bottom dead center position. The fuel mixes with air in the cylinder as the power piston advances to create a relatively lean homogeneous mixture that preferably ignites when the power piston is relatively close to the top dead center position. However, if the ignition event occurs either earlier or later than desired, lowered performance, engine misfire, or even engine damage, can result. Thus, the present invention divides the homogeneous charge between a controlled volume higher compression space and a lower compression space to better control the start of ignition.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: December 30, 2003
    Assignee: Caterpillar Inc
    Inventors: Jorge R. Agama, Scott B. Fiveland, Ronald P. Maloney, James J. Faletti, John M. Clarke
  • Patent number: 6601549
    Abstract: A two stroke homogenous charge compression ignition engine includes a volume pulsed air supplier, such as a piston driven pump, for efficient scavenging. The usage of a homogenous charge tends to decrease emissions. The use of a volume pulsed air supplier in conjunction with conventional poppet type intake and exhaust valves results in a relatively efficient scavenging mode for the engine. The engine preferably includes features that permit valving event timing, air pulse event timing and injection event timing to be varied relative to engine crankshaft angle. The principle use of the invention lies in improving diesel engines.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: August 5, 2003
    Assignee: Caterpillar Inc
    Inventor: John M. Clarke
  • Publication number: 20030116120
    Abstract: The present invention relates generally to the field of homogeneous charge compression engines. In these engines, fuel is injected upstream or directly into the cylinder when the power piston is relatively close to its bottom dead center position. The fuel mixes with air in the cylinder as the power piston advances to create a relatively lean homogeneous mixture that preferably ignites when the power piston is relatively close to the top dead center position. However, if the ignition event occurs either earlier or later than desired, lowered performance, engine misfire, or even engine damage, can result. Thus, the present invention divides the homogeneous charge between a controlled volume higher compression space and a lower compression space to better control the start of ignition.
    Type: Application
    Filed: December 20, 2001
    Publication date: June 26, 2003
    Applicant: Caterpillar, Inc.
    Inventors: Jorge R. Agama, Scott B. Fiveland, Ronald P. Maloney, James J. Faletti, John M. Clarke
  • Publication number: 20030116106
    Abstract: A two stroke homogenous charge compression ignition engine includes a volume pulsed air supplier, such as a piston driven pump, for efficient scavenging. The usage of a homogenous charge tends to decrease emissions. The use of a volume pulsed air supplier in conjunction with conventional poppet type intake and exhaust valves results in a relatively efficient scavenging mode for the engine. The engine preferably includes features that permit valving event timing, air pulse event timing and injection event timing to be varied relative to engine crankshaft angle. The principle use of the invention lies in improving diesel engines.
    Type: Application
    Filed: December 20, 2001
    Publication date: June 26, 2003
    Applicant: Caterpillar, Inc.
    Inventor: John M. Clarke
  • Publication number: 20030102390
    Abstract: An apparatus and method for controlling an impingement sleeve multi-mode fuel injection is provided for. A fuel injector has an orifice and a orifice axis and an impingement sleeve is disposed about a fuel injector, the sleeve being movable longitudinal to said tip between a first and second position and to impinge fuel spray from the fuel tip. A cavity at least partially disposed within the lower body of the fuel injector is open to a source of pressurized fluid flow capable of moving the sleeve in a first direction to change the impingement angle.
    Type: Application
    Filed: November 30, 2001
    Publication date: June 5, 2003
    Inventors: John M. Clarke, Devin C. Tornow, Ronald P. Maloney, Kevin P. Duffy
  • Publication number: 20030102389
    Abstract: An apparatus and method for controlling an impingement sleeve disposed around a fuel injector to provide for multi-mode fuel injection is provided. The sleeve and tip are at least partially exposed to pressure, preferably combustion pressure within the engine cylinder. The impingement sleeve is biased to a rest position by a spring and is movable by changing the pressure.
    Type: Application
    Filed: November 30, 2001
    Publication date: June 5, 2003
    Inventors: John M. Clarke, Kevin P. Duffy, Ronald P. Maloney, Devin C. Tornow
  • Publication number: 20030085305
    Abstract: An apparatus and method for multi-mode fuel injection is disclosed. A sleeve is disposed about a fuel injector tip movable between a first and second position and wherein the sleeve is capable of impinging the fuel spray as it enters into the combustion chamber. By impinging the fuel spray, different spray profiles or plumes can be obtained allowing the fuel injector to inject in different modes, including homogenous charge compression ignition.
    Type: Application
    Filed: November 30, 2001
    Publication date: May 8, 2003
    Inventors: John M. Clarke, Kevin P. Duffy, Ronald P. Maloney, Devin C. Tornow
  • Patent number: 6546909
    Abstract: Internal combustion engines have been developed having regeneration mechanisms for increasing efficiency and reducing emissions. Previous regeneration mechanisms have been complicated and costly. The present invention provides a simple regeneration member which is attached within a piston assembly. Thus the apparatus for attaching the regeneration member within the internal combustion engine greatly reduces the cost of the engine.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: April 15, 2003
    Assignee: Caterpillar Inc.
    Inventors: John M. Clarke, Eric C. Fluga