Monotube active suspension system having different system layouts for controlling pump flow distribution

An hydraulic actuator circuit for use with first and second shock absorbers, wherein said first and second shock absorbers each include a piston disposed within a housing, and wherein the piston helps define upper and lower working chambers within the housing, the hydraulic actuator circuit comprising:

• a motor;
• a first pump, driven by the motor, and operably associated with the first shock absorber and with the motor;
• a second pump, driven by the motor, and operably associated with the second shock absorber and with the motor;
• a first accumulator in communication with both of the first and second pumps;
• a second accumulator in communication with the first accumulator, and the upper and lower working chambers of the first shock absorber;
• a first switch valve operably associated with the upper and lower working chambers of the first shock absorber, and with the first pump, for assisting in controlling fluid flow into the upper and lower chambers of the first shock absorber;
• and
• a second switch valve operably associated with the upper and lower working chambers of the second shock absorber, and with the second pump, for assisting in controlling fluid flow into the upper and lower chambers of the second shock absorber.