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Piston cooling configurations utilizing lubricating oil from a bearing reservoir in an opposed-piston engine

A technology of piston cooling and opposing pistons, which is applied in the direction of engine lubrication, engine cooling, reciprocating piston engines, etc., and can solve problems such as loss of lubrication system

Active Publication Date: 2016-11-23
ACHATES POWERS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, oil is provided throughout the operating cycle of the piston, but at the expense of increased complexity and cost of the lubrication system

Method used

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  • Piston cooling configurations utilizing lubricating oil from a bearing reservoir in an opposed-piston engine
  • Piston cooling configurations utilizing lubricating oil from a bearing reservoir in an opposed-piston engine
  • Piston cooling configurations utilizing lubricating oil from a bearing reservoir in an opposed-piston engine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0050] Continue to refer to Figure 4and Figure 5A In the exemplary piston configuration shown in , the first cooling jet outlet embodiment consists of a passageway 270 drilled or formed in the bearing support member 219a. One end of passageway 270 is in fluid communication with oil reservoir 222 via oil fill groove 227 . When the pressurized oil contained in the reservoir enters the oil injection groove 227 , a part of the pressurized oil flows into the passage 270 , whereby the pressurized oil is sprayed in the form of a coolant jet 272 . Passage 270 is positioned and oriented so as to align with crown floor portion 260 . Accordingly, coolant jets 272 are directed towards hot spots in crown 203 associated with ridges 209 . As apparent with reference to the drawings, the bearing support member 219a is fixed to the underside of the crown. In the absence of relative motion between member 219a and crown floor 208 , jet 272 is stationary relative to crown floor 208 .

no. 2 example

[0052] Alternative coolant jet outlet in Figure 4 and Figure 5B is best shown in , where nozzle 278 is mounted to toggle pin 221 for fluid communication with reservoir 222 via oil outlet 280 . In the illustrated example, an oil outlet 280 is formed in flange 252 and nozzle 278 is mounted thereto by an elbow fitting 281 received in the oil outlet. Nozzles 278 extend into annular gallery 256 and are aimed at crown floor portion 260 . Pressurized oil contained in the reservoir 222 flows into the nozzle through the oil outlet 280 and the elbow fitting 281 . Pressurized oil is injected from nozzles 278 in the form of coolant jets 284 . It is evident with reference to the figures that the wrist pin 221 undergoes an oscillatory motion relative to the crown bottom surface 208 . Accordingly, coolant jet 284 sweeps crown floor portion 260 back and forth.

[0053] Second piston construction:

[0054] In some aspects, it may be desirable to provide more than one cooling jet to t...

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Abstract

Pressurized lubricating oil is accumulated in the bearings of opposed pistons and accumulated oil is dispensed therefrom for bearing lubrication and also for cooling the undercrowns of the pistons by jets of oil emitted from the bearings.

Description

[0001] priority [0002] This application claims priority from US 14 / 199,877, filed March 6, 2014, and is a continuation-in-part of that application. [0003] related application [0004] This application contains subject matter that is related to that of US 2012 / 0073526A1 and US Publication 2014 / 0238360A1. technical field [0005] This field is piston thermal management for internal combustion engines. More specifically, the application relates to the implementation of a piston cooling arrangement for opposed-piston engines in which the undercrown is cooled by using one or more jets of lubricating oil fed from a reservoir in the bearing mechanism of the piston. )—the portion of the piston crown below or below the end face of the crown on which combustion acts. Background technique [0006] Due to the increased loads required for modern engines, piston thermal management presents a constant challenge to piston integrity. In a typical piston, four areas are particularly s...

Claims

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Application Information

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IPC IPC(8): F02F3/22F01M1/06F01M1/08F16J1/16
CPCF01M1/08F01M2001/066F02B25/08F02B75/282F02F3/22F02F3/225F01B7/02F01M1/06F01P3/08F02B75/28F02F3/26F16C9/04F16J1/16
Inventor R·G·麦肯齐
Owner ACHATES POWERS INC