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Control based on magnetic circuit feedback

A circuit and electromagnet technology, applied in the direction of valve control, electrical control, electronic control, etc., can solve problems such as complex equipment costs

Active Publication Date: 2019-07-02
EATON INTELLIGENT POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means two hydraulic feeds per rocker arm, which requires a certain level of complexity and equipment cost
Oil requirements for these hydraulic feeds may approach the limits of existing supply systems

Method used

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  • Control based on magnetic circuit feedback
  • Control based on magnetic circuit feedback
  • Control based on magnetic circuit feedback

Examples

Experimental program
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Embodiment Construction

[0052] In the drawings, some reference characters consist of numbers followed by letters. In this specification and the following claims, reference characters consisting of the same numeral without a letter are equivalent to the listing of all reference characters used in the drawings and consisting of the same numeral followed by a letter. For example, "valve mechanism 101" is the same as "valve mechanism 101A, 101B".

[0053] Figure 1A A partial cutaway side view of a portion of an internal combustion engine 100A including a valvetrain 101A is provided in accordance with some aspects of the present teachings. The internal combustion engine 100A includes a cylinder head 130 in which a combustion chamber 137 is formed, a movable valve 185 having a seat 186 formed in the combustion chamber 137 , and a camshaft 169 on which a cam 167 is mounted. The movable valve 185 may be a poppet valve. The valvetrain 101A includes a rocker assembly 115A, a hydraulic lash adjuster (HLA) 18...

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PUM

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Abstract

A method of operating an internal combustion engine of a type that has a combustion chamber, a moveable valve having a seat formed in the combustion chamber, a camshaft on which a cam is mounted, anda rocker arm assembly having a rocker arm and a cam follower configured to engage the cam as the camshaft rotates. The method includes obtaining rocker arm position data, using the rocker arm positiondata to obtain camshaft position information, and using the camshaft position information in an engine management operation.

Description

technical field [0001] The present teachings relate to valvetrains, particularly valvetrains that provide variable valve lift (VVL) or cylinder deactivation (CDA). Background technique [0002] Hydraulically actuated latches are used on some rocker arm assemblies to achieve variable valve lift (VVL) or cylinder deactivation (CDA). For example, some shift roller finger followers (SRFF) use hydraulically actuated latches. In these systems, pressurized oil from an oil pump can be used for latch actuation. The flow of pressurized oil is regulated by an oil control valve (OCV) under the supervision of the engine control unit (ECU). A separate feed from the same source provides oil for hydraulic clearance adjustment. This means two hydraulic feeds per rocker arm, which requires a certain level of complexity and equipment cost. The oil requirements of these hydraulic feeds can approach the limits of existing supply systems. Additionally, on-board diagnostic information for cyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/24F01L1/18
CPCF01L1/185F01L1/2405F01L13/0005F01L13/0036F01L2001/0537F01L2001/186F01L2013/001F01L2201/00F01L2013/101F01L2800/11F02D2041/001F02D2041/2058F02D41/221F01L2305/00F01L1/24F01L1/267F01L2301/00F01L2820/03F01L2820/041
Inventor 道格·休斯黛尔·雅顿·斯特雷奇马修·巴斯迪克尔
Owner EATON INTELLIGENT POWER LTD