Exhaust gas aftertreatment systems
All diesel models have a crankcase aftertreatment system. In addition, some models can be equipped with a catalytic converter and an exhaust gas recirculation system to reduce harmful emissions.
Crankcase emission control system
To reduce the release of unburned hydrocarbons from the crankcase to the atmosphere, the engine is hermetically sealed, crankcase gases and oil vapors are drawn from the inside of the crankcase through the oil separator to the air filter, and then burned in the engine combustion chamber. Pressure control valve (on the distributor cap) controls the flow of gases from the crankcase.
If the engine is worn, reduced crankcase pressure (due to increased gas breakthrough) may be the reason that part of the stream will be returned on all states of the collector.
Exhaust aftertreatment system
The catalyst is installed in the exhaust system. It is designed to reduce the amount of gaseous hydrocarbons, CO and other harmful impurities in the exhaust gas.
Some models may be equipped with an exhaust gas recirculation system. It reduces the level of nitrogen oxides produced by combustion under certain engine operating conditions by returning some of the exhaust gas back to the intake manifold through a special valve.
Exhaust systems
The exhaust system includes an exhaust manifold, a muffler block, a catalytic converter, a plurality of mounting brackets, and a number of connecting pipes.
On DE, NC and 1T engines, a turbogenerator is installed on the exhaust manifold.
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