Hydraulic Hybrid Vehicle - Simscape

Hello,

I am wanting to create a complete powersplit hydraulic hybrid vehicle within Simulink. The attached image is the progress I have made so far. I am having issues getting a postive flow rate going through my variable displacement pump. Any help with this issue?

I have my pipe ID set to 0.5", the initial reservior pressure at 100psi, and my Pump Displacement at 250 cc/rev.

Also any recommendations on where/how to implement a Planetary Gear Set within the system to have the "power splitting" capablilty within the system?

Thank You.