Waste heat powered exhaust pump
A technology of exhaust flow and exhaust circuit, applied in the direction of exhaust device, exhaust treatment, exhaust gas recirculation, etc., can solve the problem of increasing engine pump power, increasing internal combustion engine cylinder back pressure, engine efficiency and fuel efficiency, etc. question
Active Publication Date: 2019-05-14
BORGWARNER INC
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Problems solved by technology
[0002] Placing more and more emission control devices (such as particulate filters or selective catalytic reduction aftertreatment devices) in the engine exhaust stream increases the back pressure of the internal combustion engine cylinders, which in turn increases the pumping work of the engine and May negatively impact overall engine efficiency and fuel efficiency
Additionally, a negative pressure differential between the engine's intake manifold and exhaust pressure is required to drive the exhaust gas recirculation system, but this negative pressure differential can negatively impact engine efficiency
Method used
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[0015] The following description of the variants is merely illustrative in nature, and is by no means intended to limit the scope of the present invention, its applications or uses. The following description of the variants only describes the components, elements, actions, products, and methods considered to fall within the scope of the present invention, and is not intended to limit the scope in any way by specifically disclosed or unexplained content. The components, elements, actions, products, and methods as described herein may be combined and rearranged in different ways than those explicitly described herein, and are still considered to be within the scope of the present invention.
[0016] In many variations, Organic Rankine Cycle (ORC) waste heat recovery systems can be used to improve the fuel efficiency of vehicle engines; for example, towed trailers for long-distance commercial freight. ORC systems can use waste heat from the engine to evaporate or transfer heat to th...
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A number of variations may include a combustion engine tailpipe exhaust circuit defining an exhaust stream and a waste heat recovery system constructed and arranged to recover thermal energy from at least one of a tailpipe exhaust circuit, exhaust stream, charge air cooler, exhaust gas recirculation fluid stream, or coolant stream. The waste heat recovery system may include an expander assembly that may include a first pump, an expander, an evaporator, and a condenser. A second pump driven by the waste heat recovery system may be in fluid communication with the tailpipe exhaust circuit and exhaust stream and may be constructed and arranged to reduce exhaust pressure in the tailpipe exhaust circuit and exhaust stream. A third pump may be in fluid communication with an exhaust gas recirculation fluid stream and which is constructed and arranged to pump the exhaust gas recirculation fluid stream within the exhaust gas recirculation system.
Description
Technical field [0001] The field generally covered by the present disclosure includes waste heat recovery. Background technique [0002] Installing more and more emission control devices (such as particulate filters or selective catalytic reduction aftertreatment devices) in the exhaust flow of the engine will increase the back pressure of the cylinders of the internal combustion engine, which in turn increases the pumping power of the engine. May have a negative impact on overall engine efficiency and fuel efficiency. In addition, a negative pressure difference between the engine's intake manifold and exhaust pressure is required to drive the exhaust gas recirculation system, but this negative pressure difference may have a negative impact on engine efficiency. [0003] The waste heat recovery system can be used in internal combustion engine systems to recover waste heat from exhaust gas or other waste liquids. [0004] The Organic Rankine Cycle (ORC) waste heat recovery system is...
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IPC IPC(8): F02M26/05F02G5/00
CPCF01N2240/02F01N5/02F01N5/04F02B37/004F02B37/005Y02T10/12
Inventor P·K·安斯切尔
Owner BORGWARNER INC