Abstract: A multi-paneled cooling module adapted to be mounted to an engine exterior protects electronic components such as sensors and associated wiring from heat loads of the engine and/or other heat generating engine devices. The module is formed of wall and ceiling panels having a relatively high thermal conductivity, such as aluminum. The cooling module, which includes strategically situated integral coolant passages within several of its panels, is adapted to protect all enclosed electronic components, including electronic pressure sensors, an EGR valve, and all associated wiring and wiring harnesses. For example, the sensors, harnesses, and valve components associated with and proximal to an EGR venturi may be fully protected from overheating, in spite of exposure of those components to massive heat loads generated by the venturi. Finally, the cooling module may incorporate additional cooling accommodation for hydraulic oil cooling if, for example, the EGR valve is hydraulically actuated.

Abstract: A multi-paneled cooling module adapted to be mounted to an engine exterior protects electronic components such as sensors and associated wiring from heat loads of the engine and/or other heat generating engine devices. The module is formed of wall and ceiling panels having a relatively high thermal conductivity, such as aluminum. The cooling module, which includes strategically situated integral coolant passages within several of its panels, is adapted to protect all enclosed electronic components, including electronic pressure sensors, an EGR valve, and all associated wiring and wiring harnesses. For example, the sensors, harnesses, and valve components associated with and proximal to an EGR venturi may be fully protected from overheating, in spite of exposure of those components to massive heat loads generated by the venturi. Finally, the cooling module may incorporate additional cooling accommodation for hydraulic oil cooling if, for example, the EGR valve is hydraulically actuated.

Abstract: A system for optimizing engine braking power is provided. The system includes an intake manifold configured to receive air from a compressed air source. The system includes an engine brake associated with a power source. The system also includes a bleed valve configured to bleed a portion of the air from the intake manifold. The system further includes a controller in communication with the bleed valve and configured to receive a status of the engine brake. The controller is configured to activate the bleed valve to bleed a portion of the air from the intake manifold based at least in part on the engine brake being active and based at least in part on a pre-determined relationship between an air pressure in the intake manifold and one or more parameters associated with the power source.

Abstract: A first aspect of the present disclosure includes a power source for use with selective catalytic reduction systems for exhaust-gas purification. The power source may comprise a first cylinder group with a first air-intake passage and a first exhaust passage, and a second cylinder group with a second air-intake passage and a second exhaust passage. The power source may further include a first forced-induction system in fluid communication with the first air-intake passage, and a second forced-induction system in fluid communication with the second air-intake passage. A catalyst may be disposed downstream of the fuel-supply device to convert at least a portion of the exhaust stream in the first exhaust passage into ammonia.

Abstract: An exhaust recirculation system includes a power source including at least one cylinder outputting exhaust gas and a particulate reducing device fluidly connected to at least one exhaust duct of the power source. The particulate reducing device is configured to reduce an amount of particulates in the exhaust gas. The exhaust recirculation system also includes a recirculation compressor configured to receive and compress at least a portion of the exhaust gas. An intake duct of the at least one cylinder of the power source is fluidly connected to the recirculation compressor to receive the compressed reduced-particulate exhaust gas.

Abstract: A method of directing flow of exhaust gas includes directing a first portion of the flow through a first flow path and directing a second portion of the flow through a second flow path. A temperature of at least a portion of the flow in the first flow path is increased, and the flow in the first flow path is sent through a filter. The first and second portions of the flow downstream of the filter to are combined form a combined flow. The combined flow is maintained within a predetermined range of temperatures, and the combined flow is directed to a catalyst.

Abstract: A power source is provided for use with selective catalytic reduction systems for exhaust-gas purification. The power source has a first cylinder group fluidly connected to a first air-intake passage and a first exhaust passage, wherein the first air-intake passage is configured to provide air at a first set of characteristics. The power source also has a second cylinder group fluidly connected to a second air-intake passage and a second exhaust passage, wherein the second air-intake passage is configured to provide air at a second set of characteristics different from the first set of characteristics. An ammonia-producing catalyst may be disposed within the first exhaust passage and configured to convert at least a portion of a fluid in the first exhaust passage into ammonia.

Abstract: A variable compression ratio mechanism for an internal combustion engine that has an engine block and a crankshaft is disclosed. The variable compression ratio mechanism has a plurality of eccentric disks configured to support the crankshaft. Each of the plurality of eccentric disks has at least one cylindrical portion annularly surrounded by the engine block. The variable compression ratio mechanism also has at least one actuator configured to rotate the plurality of eccentric disks.

Abstract: An internal combustion engine has a cylinder block defining a cylinder. A piston is disposed in the cylinder. The internal combustion engine has a connecting rod connected to the piston and a crankshaft connected to the connecting rod. The internal combustion engine has a vcr mechanism connected to the crankshaft. A first gear is connected to the crankshaft, and a second gear is in mesh with the first gear. The second gear is connected to the vcr mechanism. The internal combustion engine has a third gear in mesh with the second gear. The third gear has a fixed center of rotation.