Adjustable restriction muffler system for a combine
AssigneeDeere & Company
InventorsAlan D. Sheidler, Kyle J. Tingle
Life of this patent
Estimating the term…
Abstract
A bypass for an exhaust system for a utility vehicle, such as a combine, that, when substantially closed, provides maximum noise attenuation for road transport, i.e., relatively high back pressure, and then, when substantially open, would provide a reduced flow restriction, i.e., relatively low back pressure, for full power, field operation. A bypass flow path in an exhaust pipe is located upstream of a primary muffler. A diaphragm can be provided to manipulate a damper which acts to close the exhaust flow to the primary muffler and open the bypass to an exhaust pipe to effectively bypass the primary muffler.
Claims14
An exhaust system for a combine comprising;
- an internal combustion engine configured to drive the combine on a roadway at roadway speeds and in a field at harvesting speeds;
- an exhaust pipe from the internal combustion engine;
- a muffler flow-connected to said exhaust pipe and arranged to direct exhaust gas to atmosphere;
- a bypass exhaust path that is flow-connected to said exhaust pipe, said bypass exhaust path arranged to direct exhaust gas around said muffler to atmosphere;
- a valve arranged between said exhaust pipe and said bypass, said valve operable to close said bypass exhaust path during operation of said combine at roadway speeds to increase exhaust system flow restriction and sound attenuation, and operable to at least partially open said bypass exhaust path when operating said combine at harvesting speeds to decrease exhaust system flow restriction and sound attenuation.
An exhaust system for a combine comprising:
- an internal combustion engine configured to drive the combine on a roadway at roadway speeds and in a field at harvesting speeds;
- an exhaust pipe from the internal combustion engine;
- a bypass pipe flow-connected to said exhaust pipe;
- a muffler pipe flow-connected to said exhaust pipe;
- a first muffler flow-connected to said muffler pipe;
- a damper arranged between said exhaust pipe and said bypass pipe, said damper operable to close said bypass pipe during operation of said combine at roadway speeds to increase exhaust system flow restriction and sound attenuation, and operable to at least partially open said bypass pipe when operating said combine at harvesting speeds to decrease exhaust system flow restriction and sound attenuation.
Dependencies are inferred from the claim text.