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obd based on magnetic circuit feedback

A magnetic circuit and circuit technology, applied in electrical control, machine/engine, mechanical equipment, etc., can solve problems such as complex equipment cost

Active Publication Date: 2022-03-08
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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  • obd based on magnetic circuit feedback
  • obd based on magnetic circuit feedback
  • obd based on magnetic circuit feedback

Examples

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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 1AA 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 the 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) 1...

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PUM

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Abstract

The present disclosure provides a method of operating an internal combustion engine including a valve train having a rocker arm assembly including a rocker arm on which a latch pin is mounted. An actuator for the latch pin including an electromagnet is mounted separately from the rocker arm. Rocker arm position information is obtained by collecting and analyzing data related to current or voltage in a circuit operable to power the electromagnet. The rocker arm position information is used to perform diagnostics.

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 Patents(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