ELECTROMAGNETIC DRIVE OF PISTON ENGINE GAS CONTROL VALVE Russian patent published in 2009 - IPC F01L9/04 

FIELD: engines and pumps.

SUBSTANCE: proposed drive incorporates non-magnetic housing accommodating first and second driving electromagnets representing opening and closing electromagnetic solenoids (OES and CES) with their appropriate ferromagnetic armatures, stators, current-conducting coils, and third locking electromagnet with its ferromagnetic armature and current-conducting coil. The aforesaid electromagnets are connected to control system. Electric drive working member is coupled with valve and represents movable core made up of three armatures fastened on the non-magnetic rod to interact with appropriate electromagnet. The aforesaid OES is mounted at the housing top to reciprocate in the working chamber due to alternate feed of working fluid into its top and bottom parts. The aforesaid CES is fitted at the housing centre at preset distance h from OES corresponding to the valve complete opening state and is rigidly fixed relative to the housing. The third locking electromagnet is mounted on the housing bottom with its disk armature being attached onto the non-magnetic rod lower end. The ES ferromagnetic armatures are seated with a preset radial pilot gap A relative to appropriate stators. The proposed drive is arranged on the piston engine outer side surface. The mechanism coupling the working member with the valve represents an outer mechanical transfer link made up of rod and valve rocker with pivoting links between its all movable elements. The third locking electromagnet is furnished with adjusting screw, while non-magnetic tight housing features outer cooling.

EFFECT: lower thermal loads on drive at minimum dynamic loads on gas control valve in its closing, lower power consumption from automotive onboard power supply circuit, control over valve stroke using no throttle valve, plus possibility to increase electromagnetic drive vertical size without increasing that of piston engine.

4 cl, 6 dwg