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Springless valve system

a valve system and springless technology, applied in valve arrangements, machines/engines, mechanical equipment, etc., can solve the problems of robbing horsepower, removing the camshaft, and more work for the engine, so as to improve the engine performance, prevent damage, and manufacture and adjust simple

Inactive Publication Date: 2008-03-06
PIT BULL PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is a poppet valve actuation system for internal combustion engines that is simple and easy to adjust. It uses separate opening and closing cam lobes that actuate their respective cam followers by pressing on them, resulting in a linear path of valve movement. The system has minimal reciprocating mass and is not hampered by heavy springs, which should improve engine performance and allow for higher revolutions without valve float. The invention can be incorporated into any internal combustion engine design and requires less force to operate than previous systems, making it ideal for weight reduction."

Problems solved by technology

Disadvantages of the heavy spring system are: i) heavy spring loading creates more work for the engine thus robbing horsepower, ii) valves are able to “float” (i.e., not follow the valve profile closely) at high RPM, and iii) if the cam is situated directly over the valve, the heavy spring system generally requires removal of the camshaft for valve adjustment.

Method used

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Embodiment Construction

[0015]While the invention is susceptible to embodiments in many different forms, there are shown in the drawings and will be described herein, in detail, the preferred embodiments of the present invention. It should be understood, however, that the present disclosure is to be considered an exemplification of the principles of the invention and is not intended to limit the spirit or scope of the invention and / or claims of the embodiments illustrated.

[0016]The present invention is for use in internal combustion, four-stroke piston engines. Referring now to FIGS. 1-3, there is shown a springless valve system 10, which includes a conventional poppet valve 20 with an opening cam 30 to open the valve 20 and a closing cam 40 to close the valve 20. The opening and closing cams, 30 and 40 respectively, are mounted on a cam shaft 50 that is driven to rotate such that the cams rotate.

[0017]Two cam followers, an opening cam follower 32 and a closing cam follower 42, are directly linked to each ...

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PUM

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Abstract

A poppet valve actuation system utilizing separate opening and closing cams that press against opening and closing cam followers, respectively. The opening and closing cam followers are linked to each other directly by a tension member so they move in unison. The valve is firmly connected to the opening cam follower. The opening and closing cam followers and valve are all collinear when viewed from the end of the cam shaft.

Description

FIELD OF THE INVENTION[0001]The present invention relates generally to valve systems for internal combustion engines. More particularly, this invention pertains to a poppet valve actuation system for internal combustion engines.BACKGROUND OF THE INVENTION[0002]Most prior internal combustion, such as a four-stroke piston engines, use an opening cam to open the valve, but use heavy spring(s) to close the valve. Though there are many detailed variations to how prior systems are implemented, the cam and valve are generally either linked directly whereby the cam presses directly on the valve or via rocker arms where the cam is generally not situated directly over the valve.[0003]Disadvantages of the heavy spring system are: i) heavy spring loading creates more work for the engine thus robbing horsepower, ii) valves are able to “float” (i.e., not follow the valve profile closely) at high RPM, and iii) if the cam is situated directly over the valve, the heavy spring system generally requir...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01L1/30
CPCF01L1/30F01L2101/00F01L1/462F01L2301/00
Inventor VANVALKENBURGH, CHARLES N.
Owner PIT BULL PRODS