1.2L REVOTRON ENGINE 33 Description The exhaust system consists of an Exhaust manifold, Close Coupled Catcon Assy (CCC) Presilencer and Rear Silencer. The exhaust pipes are supported using rubber hangers. The Close Coupled Catcon (CCC) is provided to reduce the exhaust emission, whereas the presilencer and rear silencer is provided to dampen the sound of the exhaust gases coming out of the engine. The exhaust system consist of the following components 1. Exhaust Manifold 2. Upstream Lambda Sensor 3. Close Coupled Catalytic Convertor (CCC) 4. Downstream Lambda Sensor 5. Front Pipe with Pre-silencer 6. Exhaust Pipe Assy, Rear 7. Rubber Hanger COMPONENTS 1. Exhaust Manifold The exhaust manifold is connected to the cylinder head. The exhaust gases are trapped out from the engine through the exhaust manifold. 2. Lambda Sensor The oxygen sensor operates on the principle of galvanic oxygen concentration cell (Nernst cell) with solid electrolyte (Nernst's principle). The ceramic sensing element is a conductor of oxygen ions from a temperature of 350 °C. A heater is integrated on the sensing element. It is placed into the exhaust manifold. The sensing element compares the residual oxygen content in the exhaust gas with the oxygen content in the reference atmosphere (air surrounding the sensing element). This gives an output voltage between 100mV (lean exhaust gas) to 800mV (rich exhaust gas), depending on whether the exhaust gas is lean or rich.
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