Methods and systems for improving the operation of transmissions for motor vehicles

A pressure regulator valve for an automotive transmission, said pressure regulator valve comprising separate first and second valve components, said first valve component having a protuberance defining a fulcrum extending from one end thereof in a direction towards an adjacent end of said second valve component, said first and second valve components being arranged such that the fulcrum of said first valve component directly contacts the adjacent end of said second valve component as said first and second valve components reciprocally move in a valve bore, wherein the first and second valve components are of equal length.

An hydraulic circuit for an automotive transmission, said hydraulic circuit having a pressure regulator valve, said pressure regulator valve comprising separate first and second valve components, said first valve component having a protuberance defining a fulcrum extending from one end thereof in a direction towards an adjacent end of said second valve component, said first and second valve components being arranged such that the fulcrum of said first valve component directly contacts the adjacent end of said second valve component as said first and second valve components reciprocally move in a valve bore ,wherein at least one of said first and second valve components of said pressure regulator valve defines a vent opening , wherein said vent opening is defined in a land of said at least one valve component of said pressure regulator valve, wherein the size of said vent opening is selected such that fluid pressure in said at least one valve component does not exceed a predetermined fluid pressure so as to prevent said first and second valve components frown disengaging from each other during reciprocal movement of said first and second valve components in said valve bore.

An hydraulic circuit for an automotive transmission, said hydraulic circuit having ,a pressure regulator valve, said pressure regulator valve comprising separate first and second valve components, said first valve component having a protuberance defining a fulcrum extending from one end thereof in a direction towards an adjacent end of said second valve component, said first and second valve components being arranged such that the fulcrum of said first valve component directly contacts the adjacent end of said second valve component as said first and second valve components reciprocally move in a valve bore, wherein the first and second valve components of said pressure regulator valve are of equal length.

A method of modifying an automotive transmission having a pressure regulator valve formed from a single valve component, said method comprising the steps of:

• replacing said single valve component pressure regulator valve with a replacement pressure regulator valve having separate first and second valve components, said first valve component having a protuberance defining a fulcrum extending from one end thereof in a direction towards an adjacent end of said second valve component,
• arranging said first and second valve components such that the fulcrum of said first valve component directly contacts the adjacent end of said second valve component as said first and second valve components reciprocally move in a valve bore, and
• defining a vent opening in a land of at least one of said first and second valve components.

A pressure regulator valve for an automotive transmission, said pressure regulator valve comprising separate first and second valve components, said first valve component having a protuberance defining a fulcrum extending from one end thereof in a direction towards an adjacent end of said second valve component, said first and second valve components being arranged such that the fulcrum of said first valve component directly and continuously contacts the adjacent end of said second valve component as said first and second valve components reciprocally move in a valve bore during operation of the pressure regulator valve, wherein a space between the outer surfaces of said first and second valve components and the inner surface of said valve bore surrounding said first and second valve components is sufficiently wide so as to enable relative pivoting of said first and second valve components on said fulcrum of said first valve component when said first and second valve components move through a distorted section of said valve bore.

A pressure regulator valve for an automotive transmission, said pressure regulator valve comprising separate first and second valve components, said first valve component having a protuberance defining a fulcrum extending from one end thereof in a direction towards an adjacent end of said second valve component, said first and second valve components being arranged such that the fulcrum of said first valve component directly and continuously contacts the adjacent end of said second valve component as said first and second valve components reciprocally move in a valve bore during operation of the pressure regulator valve, wherein at least one of said first and second valve components defines a vent opening , wherein said vent opening is defined in a land of said at least one valve component, wherein the size of said vent opening is selected such that fluid pressure in said at least one valve component does not exceed a predetermined fluid pressure so as to prevent said first and second valve components from disengaging from each other during reciprocal movement of said first and second valve components in said bore.