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Methods and systems for exhaust muffler system

A muffler and exhaust channel technology, applied in the field of exhaust muffler systems, can solve problems such as temperature rise of the muffler, affecting the attenuation efficiency of the muffler, and reducing tuning flexibility

Pending Publication Date: 2021-04-16
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As one example, including multiple attenuation structures in a muffler can result in an increase in exhaust back pressure, which can adversely affect engine power
In smaller vehicles, the size of the muffler and positioning options for the muffler inlet and outlet can be limited, making noise attenuation in conjunction with exhaust back pressure reduction challenging
An exhaust tuning valve can be used to adjust the noise level of the exhaust leaving the vehicle; however, a tuning valve at the inlet of the muffler reduces tuning flexibility due to packaging constraints
The proximity of the muffler to the exhaust manifold, turbine, and catalyst may result in an increase in the temperature of the muffler, which may adversely affect the damping efficiency of the muffler

Method used

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  • Methods and systems for exhaust muffler system
  • Methods and systems for exhaust muffler system
  • Methods and systems for exhaust muffler system

Examples

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Embodiment Construction

[0015] The following description relates to systems and methods for an exhaust muffler system having multiple inlet pipes of different diameters. figure 1 and figure 2 Shown is an engine system with two cylinder banks, where each cylinder bank leads to a muffler system. Figure 3A to Figure 3B A muffler system with multiple inlet pipes is shown. The engine controller can be configured to execute control programs such as Figure 4 Exemplary procedure for ) to adjust operation of the muffler system based on desired exhaust noise levels. Figure 5 Exemplary operation of the muffler system is shown.

[0016] go to figure 1 , shows a schematic diagram of one cylinder of a multi-cylinder engine 10 that may be included in the propulsion system of a vehicle 5 . Vehicle 5 may be configured for propulsion on a road. Engine 10 may be controlled at least partially by a control system including controller 12 and by input by a vehicle operator 132 via an input device 130 . In this e...

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Abstract

The invention provides methods and systems for an exhaust muffler system. Methods and systems are provided for an exhaust muffler system with multiple inlets of different diameters. In one example, the muffler system may include multiple sets of inlet pipes to a muffler with each set of inlet pipes including pipes of different diameters with valves controlling exhaust flow into the inlet pipes. Exhaust from an engine bank may flow to a distinct set of inlet pipes and a distinct outlet pipe of the muffler via a separate exhaust passage.

Description

technical field [0001] The present description generally relates to methods and systems for exhaust muffler systems having multiple inlets of different diameters. Background technique [0002] A vehicle muffler receives exhaust from an engine, such as an internal combustion engine or a diesel engine, in order to attenuate the noise associated with the moving exhaust flow. The muffler may include a plurality of tubes and sound attenuating chambers formed by baffles and / or chambers within the housing. The walls of the tube may include small openings to attenuate sound waves and reduce noise levels around the vehicle. Due to regulations, higher levels of noise attenuation may be required in certain areas. [0003] Various methods are provided for mufflers to attenuate and regulate exhaust noise. In one example, as shown in U.S. Patent Application No. 2009 / 0229913, Tonietto et al. teach a dual-mode exhaust muffler for an engine of a vehicle that can be operated in a quiet mod...

Claims

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Application Information

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IPC IPC(8): F01N1/00F01N1/16F01N1/08F01N13/00F01N13/08
CPCF01N1/166F01N2470/16F01N13/107F01N1/08F01N1/168F01N2340/04F01N2240/36F01N1/163F01N1/083
Inventor 哈尼·穆罕默德·阿耶什
Owner FORD GLOBAL TECH LLC
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