Selective resetting lost motion engine valve train components

A selective and component-based technology, applied in engine components, combustion engines, engine control, etc., can solve problems such as low compression ratio, difficult cold start engine, etc., and achieve the effect of eliminating demand

Pending Publication Date: 2021-08-20
JACOBS VEHICLE SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other systems that are turned off early as the default boost device may have a lower compression ratio at startup, making it difficult to cold start the engine

Method used

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  • Selective resetting lost motion engine valve train components
  • Selective resetting lost motion engine valve train components
  • Selective resetting lost motion engine valve train components

Examples

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Embodiment Construction

[0043] Figures 1 to 10 A first example valve train assembly in the form of a rocker arm 10 is illustrated in accordance with aspects of the present disclosure. specific reference figure 1 and 2 , the rocker arm 10 may generally comprise a housing or rocker arm body 100 having a central journal portion 102 . A motion receiving portion 106 , which may receive motion from a motion source (ie, a cam), and a motion transmitting end 108 may extend in opposite directions from the central journal portion 102 . The motion transmitting end may contain an adjustable electronic foot or swivel foot assembly 180 for engaging the valve bridge. The motion receiving end 106 may contain the actuator piston assembly 200 housed therein to receive motion from a source of motion through other valve train components such as push rods. According to aspects of the present disclosure, the rocker arm body 100 may house and integrate an actuator piston assembly 200 , a reset piston assembly 300 , an...

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Abstract

Systems and related methods include a rocker arm having integrated components, including a lost motion actuator piston and components for resetting the lost motion actuator piston to provide normal valve closing or late valve closing. Selective reset is facilitated by a reset piston and a blocking piston disposed in a hydraulic circuit including a reset passage. In a non-resetting mode of operation, the blocking piston may block oil flow within the reset passage, regardless of the position of the reset piston, which facilitates late valve closing. An alternative embodiment includes a blocking sleeve disposed concentrically relative to the reset piston.

Description

[0001] Related applications and priority claims [0002] This application claims priority to U.S. Provisional Patent Application Serial No. 62 / 792,507, filed January 15, 2019, entitled "LOST MOTION SELECTIVE RESETTING ROCKER ARM." The subject matter of this provisional application is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure generally relates to systems and methods for actuating one or more engine valves in an internal combustion engine. More specifically, the present disclosure relates to methods for varying the operational relationship between a source of motion (e.g., a cam) and one or more engine valves to provide, for example, an intake valve for use in pushrod engines or space-constrained engines. A system and method of variable valve actuation (VVA) and, for example, providing a two-position intake valve lift, where the first position may be normal valve closing and the second position may be retarded valve closin...

Claims

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Application Information

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IPC IPC(8): F01L13/00F01L1/18F01L9/12
CPCF01L1/2416F01L2820/01F01L1/267F01L1/181F01L2810/02F01L1/2422F01L13/0015F01L2013/105F02D13/0269F02D13/0226Y02T10/12F01L13/065F01L9/12F01L2810/01
Inventor J·D·巴尔特鲁基
Owner JACOBS VEHICLE SYST
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