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Systems and methods for piston cooling

A piston cooling and piston technology, which is applied in the direction of piston, liquid cooling, engine cooling, etc., can solve the problem of engine efficiency reduction and other issues

Active Publication Date: 2016-10-26
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pumps that pressurize the oil may perform extra work, resulting in reduced engine efficiency

Method used

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  • Systems and methods for piston cooling
  • Systems and methods for piston cooling
  • Systems and methods for piston cooling

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Embodiment Construction

[0016] The following description refers to cooling in the engine (for example, in figure 1 Systems and methods for pistons in the engine shown in ). as in figure 2 As shown in , the engine includes a plurality of pistons and a crankshaft, each piston reciprocating within a cylinder of the engine; and the crankshaft is lubricated and cooled by a lubrication system having an oil pump, oil passages, and a plurality of piston cooling assemblies. Each of the plurality of pistons may receive cooling oil via an associated piston cooling assembly. Such as image 3 As shown, the piston cooling assembly may include a poppet valve, a valve body, and a nozzle. The piston cooling assembly may inject oil onto the associated piston when the associated piston reaches a bottom dead center (BDC) position. Further, the supply may be terminated as the associated piston travels towards top dead center (TDC). Therefore, the oil supply may only be repeatedly activated during a portion of each ...

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Abstract

Methods and systems are provided for supplying cooling oil to a piston of an engine cylinder. In one example, a method may include repeatedly activating an oil supply only during a part of a cylinder cycle synchronous with a reciprocating motion of the piston. In particular, supply of cooling oil may be initiated by displacing a poppet valve arranged within a piston cooling assembly via a reciprocating motion of the piston.

Description

technical field [0001] The present disclosure generally relates to methods and systems for piston cooling. Background technique [0002] The thermal load on the pistons within the engine's cylinders increases in response to the demand for higher power output and lower emissions. However, the increased thermal load on the piston may cause problems such as engine seizure and engine degradation. Also, designing the piston to avoid such degradation may involve more costly materials and manufacturing methods, or sacrifice other desirable properties. [0003] The lubrication system may be used to cool various engine components during a dynamic range of engine operating conditions. For example, the piston may be cooled by piston cooling jets, in which oil is sprayed on the bottom surface of the piston. Chimonides et al. in US Pat. No. 6,298,810 describe an example piston cooling assembly in which oil injectors are located on the engine block to supply oil to the bottom surface o...

Claims

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Application Information

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IPC IPC(8): F01P3/08
CPCF01P3/08F01M1/14F01M1/16F01M1/08F02F3/22
Inventor T·G·里昂
Owner FORD GLOBAL TECH LLC