Accumulator assembly

An accumulator for a hydraulic control system in a transmission of a motor vehicle, the accumulator comprising:

• a pressure canister having a closed end and an open end, the pressure canister having an inner surface that defines a first cavity and having a stop located within the first cavity;
• a piston disposed within the first cavity, the piston having a non-perforated outer surface, the piston sealed to the inner surface of the pressure canister;
• and
• an end cap disposed over the open end of the pressure canister, wherein the outer surface of the piston and the end cap define a second cavity, the end cap having an inlet/outlet port in continuous, uninterrupted communication with the second cavity for communicating unimpeded a transmission oil in and out of the second cavity;
• a pipe connected to the inlet/outlet port of the end cap;
• a biasing member disposed within the pressure canister and located axially between the closed end of the pressure canister and the piston, the biasing member configured to bias the piston towards the end cap;
• and
• a support member coupled to an outside surface of the closed end of the pressure canister,
• wherein the piston is translatable along an axis between a charged position where the piston contacts the stop and a discharged position where the piston at least partially contacts the end cap,
• wherein the piston stop is located radially outboard of the biasing member, and
• wherein the piston exerts a force at the stop of the pressure canister thereby limiting the force exerted by the compression of the biasing member on the closed end of the pressure canister when the piston is in the charged position.