The intake pressure and exhaust back pressure of the engine air-path are controlled through two EPRs. An Original Equipment Manufacturer (OEM) EGR valve is used to govern the conduction of the EGR loop on the engine system through CAN communication.
Pressure, air mass flow rate, and temperature are monitored on the intake side of the engine air-path. Temperature and the pressure are watched over at the exhaust side of the engine air-path.
- CAN: Controller Area Network
- USB: Universal Serial Bus
- DAQ: Data AQuisition card
- BPV: Back Pressure Valve
- EPR: Electro-Pneumatic Regulator
- EGR: Exhaust Gas Recirculation
- PC: Personal Computer
In-house developed LabVIEW programs are used to monitor and control the engine air-path. These include the:
- Air flow control program, which control's the opening of the intake EPR, the backpressure valve and the EGR valve.
- Air-monitor program, which provides the information of the intake mass air flow rate, intake pressure, intake temperature and estimated EGR rate.
