Switch valve assembly and hydraulic control module including same

A switch valve assembly for controlling a first fluid flow and second fluid flow in a hydraulic circuit defined by a valve body and a separator plate of a valve body assembly of a transmission of a vehicle, with the valve body defining a fluid exit within the hydraulic circuit, with the valve body further defined as a first body housing defining a first fluid path in the hydraulic circuit for the first fluid flow and a second body housing defining a second fluid path in the hydraulic circuit for the second fluid flow, with the separator plate disposed between the first and second body housings for separating the first fluid path from the second fluid path, and with the first body housing defining a bore having a length with a first axis extending along the length of the bore, said switch valve assembly comprising:

• a piston disposed within the bore and moveable between a first position for allowing the first fluid flow to flow laterally within the first fluid path with respect to the first axis and into the fluid exit and for restricting the first fluid flow from entering into the second fluid path, and a second position for allowing the first and second fluid flows to flow into the fluid exit;
• a biasing member coupled to said piston, with said biasing member biasing said piston from said second position toward said first position;
• wherein
• said piston presents a regulating surface oriented with respect to the first axis such that the first fluid flow fluidly engages said regulating surface in a manner that biases said piston into said first position in conjunction with said biasing member.

A switch valve assembly for controlling a first fluid flow and second fluid flow in a hydraulic circuit defined by a valve body and a separator plate of a valve body assembly of a transmission of a vehicle, with the valve body defining a fluid exit within the hydraulic circuit, with the valve body assembly further defined as a first body housing defining a first fluid path in the hydraulic circuit for the first fluid flow and a second body housing defining a second fluid path in the hydraulic circuit for the second fluid flow, with the separator plate disposed between the first and second body housings for separating the first fluid path from the second fluid path, with the first body housing defining a bore having a length with a first axis extending along the length of the bore, and with and with the first body housing defining a cutout, said switch valve assembly comprising:

• a piston disposed within the bore and moveable between a first position for allowing the first fluid flow to flow laterally within the first fluid path with respect to the first axis and into the fluid exit and for restricting the first fluid flow from entering into the second fluid path, and a second position for allowing the first and second fluid flows to flow into the fluid exit;
• a biasing member coupled to said piston, with said biasing member biasing said piston from said second position toward said first position;
• and
• a valve seat engageable by said piston when said piston is in said first position;
• wherein
• said valve seat is disposed within the cutout defined by the first body housing to fix said valve seat with respect to the first body housing and the separator plate.