Valve train with cylinder deactivation and compression release

A cylinder, actuating mechanism technology, applied in the field of operation of internal combustion engine systems, which can solve the problems of expensive, unable to provide deceleration ability, etc.

Active Publication Date: 2020-10-02
CUMMINS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some engines, such as those with low compression ratios and/or low exhaust backpressure, do not provide sufficie

Method used

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  • Valve train with cylinder deactivation and compression release
  • Valve train with cylinder deactivation and compression release
  • Valve train with cylinder deactivation and compression release

Examples

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Embodiment Construction

[0016] While the invention may take many different forms, for the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings, and specific language will be used to describe the same. It should be understood, however, that no limitation of the scope of the invention is intended thereby. Any alterations and further modifications in the illustrated embodiments and any further applications of the principles of the invention as described herein are contemplated herein as would normally occur to one of ordinary skill in the art to which the invention pertains.

[0017] refer to figure 1 , the internal combustion engine system 10 includes a four-stroke internal combustion engine 12 . Any engine type is contemplated, including compression ignition, spark ignition, and combinations thereof. The engine 12 may include a plurality of cylinders 14 . For illustrative purposes only, figure 1 A numbe...

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Abstract

An internal combustion engine system includes an engine with a plurality of pistons housed in respective ones of a plurality of cylinders, an air intake system to provide air to the plurality of cylinders through respective ones of a plurality of intake valves, an exhaust system to release exhaust gas from the plurality of cylinders through respective one of a plurality of exhaust valves. A valvetrain is provided for cylinder deactivation of a first part of the plurality of cylinders and compression release braking on a second part of the plurality of cylinders.

Description

Background technique [0001] The present invention relates to the operation of internal combustion engine systems, and more particularly, but not exclusively, to cylinder deactivation and compression release of internal combustion engines. [0002] Cylinder deactivation at low engine loads may be accomplished by closing the intake and exhaust valves of a portion of the engine's cylinders during certain operating conditions to save fuel and improve efficiency. Cylinder deactivation typically requires switching the cam profile operating on the deactivated cylinder from a nominal profile to a zero profile. [0003] Engine braking can be achieved through variable geometry (VG) turbo intake and / or through electric mode. However, some engines, such as those with low compression ratios and / or low exhaust backpressure, do not provide sufficient deceleration capability under electric mode conditions. Also, a VG turbo is more expensive than a turbo with a wastegate. Accordingly, furth...

Claims

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Application Information

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IPC IPC(8): F02D13/04F01L13/06F02D13/06F02D41/12F02M59/36
CPCF01L1/08F01L1/143F01L1/38F01L13/065F02D13/04F02D13/06F01L2001/0537F01L2001/467F01L2013/001F01L2250/02F01L2250/04F01L2800/00F01L2800/08F01L2820/01F01L2820/031F01L2013/101F02D41/008F02D41/0087F02D13/0257Y02T10/12F01L1/047F01L13/0036F01L13/06F01L2760/004F02D13/0207
Inventor A·K·佩尔菲托A·沙姆巴夫A·C·塞西尔R·E·舒尔茨
Owner CUMMINS INC
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