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Actuator Control System for Bistable Electric Rocker Latch

A control system, actuator technology, applied to non-mechanically actuated valves, engine components, machines/engines, etc., to solve problems such as short circuits, fatigue, etc.

Active Publication Date: 2022-07-26
EATON INTELLIGENT POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wires attached to the rocker arm can get pinched, sheared or fatigued, causing a short circuit

Method used

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  • Actuator Control System for Bistable Electric Rocker Latch
  • Actuator Control System for Bistable Electric Rocker Latch
  • Actuator Control System for Bistable Electric Rocker Latch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Figure 1 to Figure 4 The valve train 100 is shown with a rocker arm assembly 106 . The rocker arm assembly 106 includes an outer arm 103A, an inner arm 103B, and a cam follower 110 . The valve train 100 is suitable for use in a type of internal combustion engine having a combustion chamber, a movable valve having a seat formed in the combustion chamber, and a camshaft. The rocker arm assembly 106 may be mounted on the pivot shaft 140 in such an internal combustion engine in a configuration in which a cam (not shown) on the camshaft engages the cam follower 110 as the camshaft rotates. When the rocker arms 103A and 103B are engaged, the action of the cams of the cam follower 110 operates to actuate a movable valve (not shown) via the rocker arm assembly 106 .

[0027] The rocker arm assembly 106 may be a cylinder deactivation rocker arm. refer to figure 2, cylinder deactivation is controlled by electromagnetic latch assemblies 20 , one of which is mounted to each r...

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PUM

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Abstract

The present invention provides an actuator control system adapted to provide single wire control of an electromagnetic latch assembly that provides cylinder deactivation or variable valve actuation in a valve train system verb: move. The system is adapted to control an electromagnetic latch assembly that requires a DC current in a first direction for latching and a DC current in a direction opposite to the first direction for unlocking. The actuator control system includes an inverting DC / DC converter and switching elements. In some embodiments, the inverting DC / DC converter uses capacitors to store the energy that drives the inverting current. In some embodiments, the inverting DC / DC converters serve multiple different groups of electromagnets.

Description

technical field [0001] The present teachings relate to valve trains, in particular valve trains that provide variable valve lift (VVL) or cylinder deactivation (CDA). Background technique [0002] A hydraulically actuated latch is used on some rocker arm assemblies to achieve variable valve lift (VVL) or cylinder deactivation (CDA). For example, some switch roller finger followers (SRFF) use hydraulically actuated latches. In these systems, pressurized oil from an oil pump can be used for latch actuation. Under the supervision of the Internal Combustion Engine Control Unit (ECU), the flow of pressurized oil is regulated by the Oil Control Valve (OCV). A separate feed from the same source provides oil for hydraulic lash adjustment. In these systems, each rocker arm assembly has two hydraulic feeds, which requires a certain level of complexity and equipment cost. The oil requirements of these hydraulic feeds can be close to the limits of the existing supply system. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/18F01L13/00F01L1/46
CPCF01L1/185F01L13/0005F01L2001/186F01L2001/467F01L2013/001F01L2800/08F01L2820/031F01L2301/00F01L2305/00F01L9/21F01L2009/2163F01L2009/2148F01L9/26
Inventor 帕维尔·库塞拉彼得·莱斯卡尔帕维尔·福吉蒂克
Owner EATON INTELLIGENT POWER LTD