Camshaft variable timing unlocking device, method of assembly, and uses thereof

Abstract

A camshaft variable timing unlocking device for mounting to a camshaft variable timing mechanism which has internal passages in which compressed air is introduced to unlock a spring loaded lock pin. The camshaft variable timing device is than rotated counterclockwise/retard by mechanical means to any position relative to the crankshaft centerline. Accurate piston to valve clearance of both intake and exhaust valves can be checked and verified for racing and/or other high performance applications. The camshaft variable timing mechanism can be unlocked without any damage to the internal spring loaded lock pin mechanism allowing it to be reused.

What is claimed is: 
     
         1 . A variable timing unlocking device for mounting to a camshaft variable timing mechanism, comprising: a flange having a central opening a flange with a hex head whereas the central opening passes a body extending from the flange having intersecting openings to the central opening a threaded section extending from the body for securing the variable unlocking device to the camshaft variable timing mechanism. 
     
     
         2 . The variable timing unlocking device of  claim 1 , wherein the threaded section mates with the engine camshaft threads. 
     
     
         3 . The variable timing unlocking device of  claim 1 , wherein the body of the variable timing unlocking device replaces the engine variable valve timing solenoid valve. 
     
     
         4 . The variable timing unlocking device of  claim 1 , wherein the body of the variable timing unlocking device replaces the engine variable valve timing actuator valve. 
     
     
         5 . The method of using air pressure to unlock the variable timing mechanism. 
     
     
         6 . The method of using any mechanical means to turn the camshaft variable timing mechanism to the retard position relative to any crankshaft position. 
     
     
         7 . The variable timing unlocking device of  claim 1 , wherein the intersecting openings of the central opening align with the internal passages of the camshaft variable timing mechanism. 
     
     
         8 . The variable timing unlocking device of  claim 1 , wherein the intersecting openings of the central opening align with the internal passages of the camshaft variable timing mechanism. 
     
     
         9 . The variable timing unlocking device of  claim 1 , wherein the intersecting openings of the central opening back feed the internal passages of the camshaft variable timing mechanism. 
     
     
         10 . The variable timing unlocking device of  claim 1 , wherein the intersecting openings of the central opening allow compressed air to flow into the internal rotational passages of the camshaft variable timing mechanism. 
     
     
         11 . The method of unseating and unlocking the spring loaded lock pin of the variable timing mechanism. 
     
     
         12 . The method of assembling a camshaft variable timing mechanism variable timing unlocking device.