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Intra-cylinder auxiliary actuation of engine valves through selective discontinuation of main valve events

An engine valve, internal combustion engine technology, applied in engine components, combustion engines, engine control, etc., can solve complex and expensive engine braking systems and other problems

Active Publication Date: 2015-11-04
JACOBS VEHICLE SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In any case, the presence of multiple, lost motion connections between cylinders results in a relatively complex and thus more expensive engine braking system

Method used

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  • Intra-cylinder auxiliary actuation of engine valves through selective discontinuation of main valve events
  • Intra-cylinder auxiliary actuation of engine valves through selective discontinuation of main valve events
  • Intra-cylinder auxiliary actuation of engine valves through selective discontinuation of main valve events

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Experimental program
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Effect test

Embodiment Construction

[0017] now refer to figure 1 , which shows a first embodiment of components of an internal combustion engine together with a device for performing an auxiliary valve movement. In particular, the first source of motion 110 and the second source of motion 120 are exclusively associated with a given cylinder, shown schematically by box 102 . As is known in the art, sources of motion 110, 120 may take many different forms. For example, where an internal combustion engine employs one or more overhead camshafts, the source of motion may comprise the cam. Alternatively, for those engines employing overhead valve implementations, the source of motion may include a pushrod that engages a follower rod (follower or lifter) that is in direct contact with a cam located in the engine block. pole). Regardless, to the extent that the motion sources 110, 120 provide motion only to the valves of a given cylinder, the motion sources 110, 120 are associated exclusively with that cylinder. Eac...

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PUM

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Abstract

A third motion transfer mechanism transfers valve actuation motion from a second motion source to a first engine valve. A motion decoupler is configured to selectively discontinue the transfer of motion from a first motion transfer mechanism to the first engine valve. Furthermore, a reset mechanism is configured to selectively discontinue, based on operation of a second motion transfer mechanism, the transfer of motion from the third motion transfer mechanism to the first engine valve. The third motion transfer mechanism may comprise a master piston and a slave piston in fluid communication with each other via a hydraulic circuit, the master piston being configured to receive motion from the second motion source and the slave piston being configured to transfer motion to the first engine valve.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application Serial No. 61 / 769,704, filed February 26, 2013, the teachings of which are incorporated herein by this reference. technical field [0003] The present disclosure relates generally to internal combustion engines, and in particular to apparatus and systems for actuating engine valves (valves). Background technique [0004] Typically, internal combustion engines use mechanical valve actuation systems, electric valve actuation systems, or hydro-mechanical valve actuation systems to actuate the intake and exhaust engine valves. These systems may include a combination of camshafts, rocker arms and pushrods that are rotationally driven by the engine's crankshaft. When a camshaft is used to actuate engine valves, the timing of valve actuation may be fixed by the size and location of fixed lobes (lobes) on the camshaft. [0005] Although not required, ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/06F01L9/11F01L9/14
CPCF02D13/0203F01L1/08F01L9/021F01L9/025F01L13/06F01L13/065F01L2800/10Y02T10/18Y02T10/12F01L9/11F01L9/14
Inventor R·贾纳克M·C·格伦
Owner JACOBS VEHICLE SYST