NEF 4 Cylinder engine New Holland T5 Case IHVestrum
- The exhaust brake is an electrically controlled throttling valve located in the exhaust plumbing at the outlet of the turbocharger.
- This valve is operated by the Engine Control Unit (ECU) based upon the temperature in the exhaust stream at the Diesel Oxidation Catalyst (DOC) and the Selective Catalytic Reduction (SCR).
- The exhaust flap helps the SCR to reach optimal temperature by increasing the exhaust gas back pressure, and consequently exhaust gas temperature.
- The exhaust flap restricts the exhaust flow, and places a load on the engine. The load causes the engine to inject more fuel to maintain desired rpm. The result will elevate exhaust temperatures, and will maintain proper exhaust temperature for NOx reduction.
- Engine coolant cools the exhaust flap actuator.
