Motor Vehicle Turbo or Supercharger Diverter Valve System

Abstract

Turbo or super charged intake tract diverter valve system, upstream of a throttle valve, includes a closure means (10) for a diversion aperture (4.1) in the intake tract (3) to vent pressurised gases within to a bypass path or atmosphere; the closure means having a transfer aperture (12) facilitating a net three due to a pressure differential on its opposite sides of the closure means (10) so as to close or keep closed the diversion aperture (4.1). When gas pressure on opposite sides of the closure means is equal, and when an upstream side (10.1) of the closure means (10) has a pressure greater than a downstream side (5.1), then it will open the diversion aperture (4.1). An actuation means opens a control aperture (6) to create the necessary pressure differential on the closure means (10) to thereby cause same to open the diversion aperture (4.1).

1 - 29 . (canceled) 
     
     
         30 . A method of improving a turbo or super charged intake tract diverter valve system, said method comprising the steps of:
 providing a piston to open and close a diversion aperture of a bypass path, said piston having at least one transfer aperture through it, and an upstream surface area adapted to be in contact with a pressurised gas on an upstream side of said transfer aperture, which upstream surface area is less than a downstream surface area which will act under pressure of gas passing through said transfer aperture,   providing a chamber to cooperate with said piston which has a control aperture therein, said method including the step of closing or opening said control aperture by means of an actuatable valve member, to allow said piston to open or close said diversion aperture.   
     
     
         31 . A method as claimed in  claim 30 , wherein said piston includes a face which closes said diversion aperture. 
     
     
         32 . A method as claimed in  claim 30 , wherein said actuatable valve member is actuatable by a solenoid. 
     
     
         33 . A method as claimed in  claim 32 , wherein said method includes the step of utilising a vehicle's original factory fitted solenoid coil and/or valve mounting flange. 
     
     
         34 . A method as claimed in  claim 30 , wherein said face includes said transfer aperture. 
     
     
         35 . A method as claimed in  claim 30 , including the step of providing a return spring between a portion of said chamber and said piston so that said piston will have its stroke length dependent upon the amount of pressure located in said intake tract. 
     
     
         36 . A method as claimed in  claim 30 , wherein said diversion aperture remains fully closed if the pressure is not sufficient to open even if the vehicle's engine control unit is energising or actuating the means which opens said control aperture. 
     
     
         37 . A method as claimed in  claim 30 , including the step of remotely locating said actuation means from said body having said valve member. 
     
     
         38 . A method as claimed in  claim 37 , including the step of interconnecting respective ports by means of flexible tubing. 
     
     
         39 . A method as claimed in  claim 32 , including the step of actuating said solenoid by a vehicle's engine control unit or ECU. 
     
     
         40 . A kit of parts for use in a method as claimed in claim  1 , said kit including:
 a valve body adapted to be sealingly mounted to an intake tract upstream of a throttle valve associated with said intake tract,   a closure means for fitting to said valve body to operatively close off a diversion aperture in said intake tract so as to vent pressurised gases in said intake tract to a bypass path or atmosphere at predetermined times, said closure means including a chamber to be associated with said valve body and a valve member which cooperates with said chamber to close said diversion aperture, said valve member including at least one transfer aperture through it, said valve member being configured so that by means of said pressurised gases, when installed and in use, said valve member has a net force provided from a surface area differential with respect to opposite sides of said valve member so as to close said diversion aperture or keep it closed, when gas pressure on opposite sides of said valve member is equal, and when a pressure differential is created so that an upstream side of said valve member has pressure greater than a downstream side, then said valve member will move to open said diversion aperture.   
     
     
         41 . A kit of parts as claimed in  claim 40 , wherein said actuation means is included in said kit of parts, so as to interact with said chamber or said valve member, whereby when controlled to do so once installed and in use, said actuation means will open a control aperture associated with said chamber or said valve, to thereby create said pressure differential on the valve member to thereby cause same to open said diversion aperture. 
     
     
         42 . A kit of parts as claimed in  claim 40 , wherein said actuation means is a vehicle's original factory fitted solenoid coil and/or valve mounting flange and/or solenoid return spring. 
     
     
         43 . A kit of parts as claimed in  claim 42 , including a length of flexible tubing to allow connection between respective parts of said system when assembled remotely from each other.