A problem to be solved is to provide an exhaust promotion method, an exhaust promotion device, and an exhaust system improvement method for an internal combustion engine capable of further improving the exhaust efficiency by high-speed exhaust of exhaust gas. What is characteristic is that an exhaust gas discharged from the internal combustion engine is expanded in multiple stages repeatedly to reduce a temperature thereof, and thus exhaustion is performed while suppressing a behavior derived from a thermal energy of the exhaust gas.

An exhaust after-treatment mounting arrangement is provided that is mounted outside of an engine compartment and has a perforated enclosure allowing air to permeate the enclosure and establish an airflow through the enclosure to maintain part integrity of components of an exhaust after-treatment system with maximum temperature thresholds. Components of the exhaust after-treatment system may be mounted to permit movement of such components relative to upstream and downstream components in the exhaust system. The enclosure is configured to prevent contact of the hot components by operators and/or flammable materials with small venting holes through top surfaces of the enclosure and large vent holes in bottom areas of the box that allow large volumes of air to easily flow into the enclosure.

A turboprop engine assembly for an aircraft, including an internal combustion engine having a liquid coolant system, an air duct in fluid communication with an environment of the aircraft, a heat exchanger received within the air duct having coolant passages in fluid communication with the liquid coolant system and air passages air passages in fluid communication with the air duct, and an exhaust duct in fluid communication with an exhaust of the internal combustion engine. The exhaust duct has an outlet positioned within the air duct downstream of the heat exchanger and upstream of an outlet of the air duct, the outlet of the exhaust duct spaced inwardly from a peripheral wall of the air duct. In use, a flow of cooling air surrounds a flow of exhaust gases. A method of discharging air and exhaust gases in an turboprop engine assembly having an internal combustion engine is also discussed.

A heat management system for air-cooled engines suitable to power yard care equipment or vehicles. The system may generally comprise an engine, a blower configured to blow ambient cooling air across the engine, and an exhaust system comprising an exhaust header and a muffler. The exhaust header has an inlet end which receives heated exhaust gas from the engine and an outlet end fluidly coupled to the muffler. An air control baffle is configured to redirect a portion of the cooling air from the blower towards the exhaust header and the muffler to enhance cooling the exhaust system. The system may further include an outermost protective shield exposed to equipment operators and an inner heat barrier or shield located between the muffler and protective shield. The system is designed to ameliorate both radiative and convective sources of heat transfer to maintain the protective shield at temperatures below established industry standards.

A turboprop engine assembly for an aircraft, including an internal combustion engine having a liquid coolant system, an air duct in fluid communication with an environment of the aircraft, a heat exchanger received within the air duct having coolant passages in fluid communication with the liquid coolant system and air passages air passages in fluid communication with the air duct, and an exhaust duct in fluid communication with an exhaust of the internal combustion engine. The exhaust duct has an outlet positioned within the air duct downstream of the heat exchanger and upstream of an outlet of the air duct, the outlet of the exhaust duct spaced inwardly from a peripheral wall of the air duct. In use, a flow of cooling air surrounds a flow of exhaust gases. A method of discharging air and exhaust gases in an turboprop engine assembly having an internal combustion engine is also discussed.

An air delivery system for a farm machine according to the present disclosure can include a first rotary blower and a first aftertreatment enclosure. The first rotary blower can include a housing and have a first rotor and a second rotor rotatably disposed in the housing. The first and second rotors can have meshed lobes for transporting air from an inlet port to an outlet port. A first aftertreatment enclosure can be configured on the farm machine and include a first inlet, a second inlet and an outlet. The first inlet can receive engine exhaust from an engine of the farm machine. The second inlet can receive air from the rotary blower. A temperature of the engine exhaust can be reduced upon exiting the first aftertreatment enclosure through the outlet.

A system for cooling an exhaust system of a construction machine. The system has a compartment within which the exhaust system is contained. A first compartment wall forms an external boundary of the compartment and has a plurality of air inlets proximate the exhaust system. A fan assembly is also within the compartment and separated from the exhaust system by a barrier. A conduit crosses the barrier and has an inlet near the exhaust system and an outlet positioned between the barrier and the fan assembly. Air flows within the compartment along an air flow path that extends from the air inlets, around the exhaust system, through the conduit and into the fan assembly. The air flow path extends from the fan assembly through a plurality of air outlets formed in an external compartment wall.

A cooling system for cooling a component on a farm machine according to the present disclosure can include a rotary blower and a manifold. The rotary blower can include a housing and have a first rotor and a second rotor rotatably disposed in the housing. The first and second rotors can have meshed lobes for transporting air from an inlet port to an outlet port. The rotary blower can further include a first rotor shaft and a second rotor shaft rotatably supported by the housing and having first and second rotors, respectively, fixed for rotation therewith. The manifold can direct the air from the rotary blower onto the component of the farm machine.

A system for recovering electrical energy and water from exhaust gasses. The system includes a thermoelectric generator to produce electricity from the waste heat of the exhaust gasses of internal combustion engines and the like. The exhaust is cooled by the thermoelectric generator, air cycle machine and other heat absorbing devise which, through work, reduce the exhaust gas temperature and promote condensation of the water.

An exhaust after-treatment mounting arrangement is provided that is mounted outside of an engine compartment and has a perforated enclosure allowing air to permeate the enclosure and establish an airflow through the enclosure to maintain part integrity of components of an exhaust after-treatment system with maximum temperature thresholds. Components of the exhaust after-treatment system may be mounted to permit movement of such components relative to upstream and downstream components in the exhaust system. The enclosure is configured to prevent contact of the hot components by operators and/or flammable materials with small venting holes through top surfaces of the enclosure and large vent holes in bottom areas of the box that allow large volumes of air to easily flow into the enclosure.