VALVE DRIVE SYSTEMS FOR CYLINDER SHUTDOWN WITH RECHARGING AND METHOD FOR THIS
The rocker arm arrangement with a switchable dead-pass mechanism and reload cam section addresses cylinder pressure issues in CDA, ensuring efficient engine operation and emissions control by equalizing pressure in deactivated cylinders.
DE112024003386T5Pending Publication Date: 2026-06-03EATON INTELLIGENT POWER LTD
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- EATON INTELLIGENT POWER LTD
- Filing Date
- 2024-08-19
- Publication Date
- 2026-06-03
AI Technical Summary
Technical Problem
Cylinder deactivation (CDA) in engines leads to issues such as harmful low gas temperatures, lubrication system contamination, and reduced emissions control due to inadequate cylinder pressure management.
Method used
A rocker arm arrangement with a switchable dead-pass mechanism and a reload cam section that absorbs or transfers motion from a drive cam to equalize pressure in deactivated cylinders, using a locking mechanism with locking pins and springs for selective engagement with drive and reload cams.
Benefits of technology
The solution effectively manages cylinder pressure during CDA, preventing blow-by and oil ingress, maintaining engine performance and emissions control.
✦ Generated by Eureka AI based on patent content.
Smart Images
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Abstract
A rocker arm assembly actuated in a cylinder shutdown mode comprises a valve section, a drive cam section, and a refill cam section. The valve section is configured to interact with one or more valves of a cylinder. The drive cam section has a switchable dead-of-motion mechanism configured to selectively transmit or absorb motion from a drive cam to the valve section. The refill cam section is configured to couple with the valve section.
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Citation Information
Patent Citations
US-PATENTANMELDUNGNR.63/520,540
US63520540B1