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Oil system for active fuel management on four valve engines

A technology of oil system and valve, applied in the direction of engine control, engine components, machine/engine, etc., can solve problems such as cracking and complex casting cores

Active Publication Date: 2009-08-26
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As additional valves and hydraulic controls are added to the head, the casting cores used to make the head become more complex and more likely to break during casting

Method used

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  • Oil system for active fuel management on four valve engines
  • Oil system for active fuel management on four valve engines
  • Oil system for active fuel management on four valve engines

Examples

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Embodiment Construction

[0020] The following description is merely exemplary in nature and is not intended to limit the invention, its application or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

[0021] refer to figure 1 , schematically illustrates an exemplary engine assembly 10 . The engine assembly 10 may include an engine 12 in communication with an intake system 14 and an exhaust system 16 . In the example shown, the intake system 14 may include an intake manifold 20 . In some applications, intake system 14 may additionally include a throttle valve (not shown). An air intake system 14 may provide airflow (indicated by arrow 23 ) into the engine 12 . Exhaust system 16 may include an exhaust manifold 24 secured to engine 12 and in communication with exhaust gases produced by combustion of the air / fuel mixture. Exhaust manifold 24 may direct exhaust gas flow (indicated by arrow 25 ) from engine ...

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PUM

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Abstract

The invention relates to oil system for active type fuel management for four-valve engine. The oil system for selectively deactivating valves for specified cylinders of an internal combustion engine includes a cylinder head having a lash adjuster oil passage and a cylinder deactivation oil passage. Plugs are coupled to the cylinder head separating the cylinder deactivation oil passage into separate portions. A clearance between a portion of each plug and the head allows a controlled flow of oil to pass from the lash adjuster oil passage to the cylinder deactivation oil passage to purge air from the cylinder deactivation oil passage. A valve is operable to selectively supply pressurized oil to the cylinder deactivation oil passage to deactivate the specified cylinders.

Description

technical field [0001] The present invention generally relates to internal combustion engines. More specifically, an oil system for cylinder valve operation is disclosed. Background technique [0002] Internal combustion engine cylinder heads are typically constructed using a casting process. In engines with multiple valves per cylinder, relatively complex passages may be formed through the head casting to provide proper cleaning, lubrication and control of the components. As additional valves and hydraulic controls are added to the cylinder head, the casting cores used to make the cylinder head become more complex and more likely to break during casting. The consequences of a core fracture can include rejecting the casting or performing extensive machining operations that typically do not form part of the production process. [0003] Additionally, some casting designs include blind holes that can allow air pockets to form within the hydraulic passages of the cylinder hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L9/02F01L1/24F02D17/02F01L9/10F01L9/40
CPCF01L1/053F01L1/185F01L13/0005F01L1/24
Inventor R·E·巴克
Owner GM GLOBAL TECH OPERATIONS LLC