Engine having integrated waste heat recovery
AssigneeCummins Intellectual Property, Inc.
InventorDavid M. Barnes
Life of this patent
Estimating the term…
Abstract
A waste heat recovery system connects a working fluid into passages formed within an internal combustion engine. The fluid passages transport the working fluid to high temperature areas of the engine, raising the temperature of the working fluid near the phase change point or above the phase change point. The heated working fluid drives an energy conversion portion located downstream from the engine. The heat absorbed by the working fluid decreases the load on an engine cooling system as well as driving an energy conversion portion, improving fuel efficiency.
Claims19
An internal combustion engine, comprising:
- an engine body including a plurality of cylinders;
- a cylinder head attached to the engine body along an interface and including a plurality of coolant passages formed therein;
- a waste heat recovery system including a waste heat recovery circuit, which includes a plurality of waste heat recovery passages formed within at least one of the cylinder head and the engine body and sealed from the plurality of coolant passages, the plurality of waste heat recovery passages including a first manifold passage extending longitudinally along a first side of the engine along a first side of the plurality of cylinders, a second manifold passage extending longitudinally along a second side of the engine along a second side of the plurality of cylinders, and at least one transverse passage extending from the first manifold passage to the second manifold passage and fluidly connected to the first manifold passage and the second manifold passage, at least one of the plurality of waste heat recovery passages is positioned axially between at least one coolant passage and the interface;
- and
- a pump positioned along the waste heat recovery circuit upstream from the plurality of waste heat recovery passages, and an energy conversion portion positioned along the waste heat recovery circuit downstream from the plurality of waste heat recovery passages, the pump operable to transport a working fluid through the waste heat recovery circuit.
An internal combustion engine, comprising:
- an engine body including a plurality of cylinders;
- a cylinder liner positioned in each of the plurality of cylinders;
- a cylinder head attached to the engine body along an interface and including a plurality of coolant passages formed therein;
- a waste heat recovery system including a waste heat recovery circuit, and a plurality of passages formed in at least one of the cylinder head and the engine body, at least one of the plurality of passages being positioned axially between at least one coolant passage and the interface, and the plurality of passages including an annular groove formed in the cylinder liner, the waste heat recovery system further including a pump positioned along the waste heat recovery circuit upstream from the plurality of passages, and an energy conversion portion positioned along the waste heat recovery circuit downstream from the plurality of passages, the pump operable to transport a working fluid through the waste heat recovery circuit.
Dependencies are inferred from the claim text.