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Reduction of noise, vibration, and harshness in opposed-piston engine

A technology of opposing pistons and engines, applied in the direction of machine/engine, vibration suppression adjustment, rotation vibration suppression, etc., can solve the problems of increased noise, discomfort of operators and passengers, and unpleasant proximity to transportation routes, etc., to achieve the effect of reducing noise

Active Publication Date: 2020-01-10
ACHATES POWERS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These noises can cause extreme discomfort to the operator and passengers in the vehicle
The hum and rattle of the engine also adds to the constant cacophony, making it unpleasant to be close to the haul route

Method used

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  • Reduction of noise, vibration, and harshness in opposed-piston engine
  • Reduction of noise, vibration, and harshness in opposed-piston engine
  • Reduction of noise, vibration, and harshness in opposed-piston engine

Examples

Experimental program
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Embodiment Construction

[0024] Specialized gears, systems, and methods for dynamically controlling backlash in opposed-piston engines are described. Using backlash reducing gears, the amount of backlash between at least two adjacent gears in the gear train can be reduced, and at the same time, losses due to contact losses between the teeth of adjacent gears (for example, due to system torque) can be suppressed during engine operation. Noise and rattling due to reverse rotation). Adjustment of the gap between at least two adjacent gears may be continuous while the engine is operating, and may be adjusted in response to changes in the engine, such as temperature or wear.

[0025] Figure 1 shows the arrangement of cylinders, pistons and crankshaft in an opposed piston engine with an associated gear train which may include backlash reducing gears. The figure shows a three-cylinder arrangement, but this is not intended to be limiting; indeed, the basic architecture depicted in Figure 1 is applicable to o...

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PUM

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Abstract

An opposed-piston engine (10) includes at least two of: a gear train (30, 630) with a backlash reducing means; a viscous damper (300); and a centrifugal pendulum absorber (400). The opposed-piston engine (10) can include two crankshafts (621, 622) and a gear train (30, 630) to connect the crankshafts (621, 622). Any viscous dampers (300) and centrifugal pendulum absorbers (400) can be used to mitigate torsional velocity fluctuations in crankshafts (621, 622) in the engine (10), and multiple viscous dampers (300) and / or centrifugal pendulum absorbers (400) can be used in an engine (10). The backlash reducing means can include any of a means to adjust the position of gears (36a, 36b, 37, 39a, 39b, 660, 661, 662, 663) in a gear train (30, 630) relative to each other and one or more backlash reducing gears (500).

Description

[0001] related application [0002] This application contains subject matter related to subject matter of the following pending U.S. patent applications: U.S. Application 15 / 176,818, filed June 8, 2016, now U.S. Patent No. 9,958,057; filed February 23, 2012 and published as US2012 / US Application 13 / 385,539 for 0285422; US Application 13 / 858,943 filed April 8, 2013 and published as US 2014 / 0299109; US Application 13 / 944,787, filed July 17, 2013, now US Patent No. 9,618,108 ; U.S. Application 14 / 074,618, filed November 7, 2013 and published as US 2015 / 0020629; U.S. Application 14 / 450,747, filed August 4, 2014, now U.S. Patent No. 9,772,030; and April 29, 2016 U.S. application 15 / 142,261 filed and published as U.S. 2017 / 0314646. technical field [0003] The field is reducing noise, vibration and harshness (NVH) in internal combustion engines. More specifically, the field covers the reduction of gear noise and vibration in the gear train of an opposed piston engine by a combina...

Claims

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Application Information

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IPC IPC(8): F02B75/28F16F15/14F16F15/173F16H57/12F16H55/18
CPCF16H57/12F16F15/145F16F15/173F16H55/18F02B75/282F02B2075/025F16H57/0006
Inventor S·卡什亚普A·B·萨哈拉布赫J·M·凯斯勒
Owner ACHATES POWERS INC
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