System and method for estimating ring-related parameters

Patent metadata

Field	Value
Publication number	US-11573154-B2
Application number	US-201916713595-A
Country	US
Kind code	B2
Filing date	Dec 13, 2019
Priority date	Dec 13, 2019
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

A method for estimating at least one ring-related parameter related to at least one piston ring may include estimating a bore distortion of a cylinder bore. The bore distortion may include a plurality of bore distortions corresponding to a plurality of respective piston locations within the cylinder bore. The method may also include receiving the bore distortion in a ring performance model configured to dynamically estimate a plurality of ring-related parameters associated with combustion in the cylinder bore during operation of the internal combustion engine. The ring performance model may be configured to receive a static data signal indicative of static parameters and a dynamic data signal indicative of dynamic parameters related to operation of the internal combustion engine. The ring performance model may be configured to estimate at least one ring-related parameter related to at least one piston ring during operation of the internal combustion engine.

First claim

What is claimed is:

1. A computer-implemented method for determining at least one ring-related parameter related to at least one piston ring during operation of an internal combustion engine, the internal combustion engine comprising: a cylinder block defining a cylinder bore having a cross-sectional shape and a cross-sectional size in a direction substantially perpendicular to a longitudinal axis of the cylinder bore, and a piston associated with the piston ring, the piston configured to move between a plurality of piston locations within the cylinder bore, the computer-implemented method comprising:
determining an individual three-dimensional bore distortion of the cylinder bore corresponding to each location of the plurality of piston locations, each individual bore distortion indicating the cross-sectional shape and the cross-sectional size of the cylinder bore along substantially an entire length of the cylinder bore;
determining an estimated three-dimensional bore distortion of the cylinder bore by combining the individual bore distortions, the estimated bore distortion being indicative of respective differences between (1) the cross-sectional shape and an operational cross-sectional shape of the cylinder bore during operation of the internal combustion engine, and (2) the cross-sectional size and an operational cross-sectional size of the cylinder bore during operation of the internal combustion engine;
generating image data indicating:
a representation of the cylinder bore having the cross-sectional shape and the cross-sectional size, and
a representation of the estimated bore distortion of the cylinder;

causing display of the image data;
determining, using a ring performance model, at least one ring-related parameter related to at least one piston ring during operation of the internal combustion engine, the ring performance model being configured to determine the at least one ring-related parameter based at least in part on:
a bore distortion signal indicative of the estimated bore distortion;
a static data signal indicative of static parameters related to the internal combustion engine; and
a dynamic data signal indicative of dynamic parameters related to the operation of the internal combustion engine.

2. The computer-implemented method of claim 1 , wherein determining the estimated bore distortion comprises:
determining the operational cross-sectional shape and the operational cross-sectional size of the cylinder bore for each of a plurality of crankshaft angles at least partially through at least one stroke of the piston to determine a plurality of operational cross-sectional shape segments and a plurality of operational cross-sectional size segments.

3. The computer-implemented method of claim 2 , wherein determining the estimated bore distortion further comprises combining the plurality of operational cross-sectional shape segments and the plurality of operational cross-sectional size segments to define a bore distortion surface indicative of the estimated bore distortion at least partially through the at least one stroke.

4. The computer-implemented method of claim 1 , wherein determining the estimated bore distortion comprises:
determining a plurality of estimated operational cross-sectional shapes and a plurality of estimated operational cross-sectional sizes of the cylinder bore at each of a plurality of crankshaft angles at least partially through at least one stroke of the piston during operation of the internal combustion engine; and
combining the plurality of estimated operational cross-sectional shapes and the plurality of estimated operational cross-sectional sizes to define a bore distortion surface for each of the plurality of crankshaft angles indicative of the estimated bore distortion at least partially through the at least one stroke.

5. The computer-implemented method of claim 1 , wherein determining the estimated bore distortion comprises determining the operational cross-sectional shape and the operational cross-sectional size of the cylinder bore for each of a plurality of crankshaft angles through at least two strokes of the piston.

6. The computer-implemented method of claim 1 , wherein the static parameters comprise at least one of dimensions of at least one component of the internal combustion engine, material-related properties of at least one component of the internal combustion engine, or lubricant-related properties.

7. The computer-implemented method of claim 1 , wherein the dynamic parameters comprise at least one of combustion chamber pressure, combustion chamber temperature, combustion chamber thermal load, or piston side load associated with operation of the internal combustion engine.

8. The computer-implemented method of claim 1 , wherein determining the at least one ring-related parameter related to the at least one piston ring during operation of the internal combustion engine comprises determining at least one of ring friction, ring wear, blowby, oil consumption, or at least one ring force.

9. The computer-implemented method of claim 1 , further comprising:
determining an operating parameter for controlling the internal combustion engine based at least in part on the at least one ring-related parameter; and
generating a confidence level associated with the estimated bore distortion.

10. A non-transitory computer-readable storage medium having computer-executable instructions stored thereupon which, when executed by a computer, cause the computer to:
determine, for a plurality of respective piston locations within a cylinder bore, an individual three-dimensional bore distortion of the cylinder bore,
the cylinder bore being defined by a cylinder block of an internal combustion engine, and having a cross-sectional shape and a cross-sectional size, and
each individual bore distortion indicating the cross-sectional shape and the cross-sectional size along substantially an entire length of the cylinder bore;

determine an estimated three-dimensional bore distortion of the cylinder bore by combining the individual bore distortions, the estimated bore distortion being indicative of differences between the cross-sectional shape and the cross-sectional size of the cylinder bore and an operational cross-sectional shape and an operational cross-sectional size of the cylinder bore during operation of the internal combustion engine;
receive a bore distortion signal indicative of the estimated bore distortion;
receive a static data signal indicative of static parameters related to the internal combustion engine;
receive a dynamic data signal indicative of dynamic parameters related to operation of the internal combustion engine;
determine at least one ring-related parameter, associated with combustion in the cylinder bore during operation of the internal combustion engine, based at least in part on the estimated bore distortion, the static parameters, or the dynamic parameters;
determining an operational parameter of the internal combustion engine, or a second internal combustion engine, based at least in part on the at least one ring-related parameter; and
controlling the internal combustion engine or the second internal combustion engine based at least in part on the operational parameter.

11. The non-transitory computer-readable storage medium of claim 10 , wherein determining the estimated bore distortion comprises determining the operational cross-sectional shape and the operational cross-sectional size of the cylinder bore for each of a plurality of crankshaft angles at least partially through at least one stroke of a piston to determine a plurality of operational cross-sectional shape segments and a plurality of operational cross

Assignees

• Caterpillar Inc

Inventors

• Smith Thomas Ryan
• MORGAN Bradley
• Jarrett Mark Wayne
• Katakam Srikanth

Classifications

• F02B77/085

  with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame · CPC title

• G01M15/042 Primary

  by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12 · CPC title

• G01B21/32

  for measuring the deformation in a solid · CPC title

• F02B77/08 Primary

  Safety, indicating, or supervising devices (thermal insulation F02B77/11; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00) · CPC title

• G01B5/003

  Measuring of motor parts · CPC title