Catalytic converters in diesel engines: features and differences from gasoline

Exhaust gas neutralizers for diesel and gasoline engines perform similar tasks, but differ significantly in design. Such differences are caused by the different composition of exhaust gases and the nature of fuel combustion in these types of power units.

It is useful for owners of diesel cars to understand the features of their cleaning systems for proper maintenance. If it is time to replace a used spera part, find out how to sell catalytic converter on the Autocatalyst site – they offer good prices for old devices. Due to the content of platinum and palladium, you can get back part of the costs of a new element.

Specifics of the operation of a diesel neutralizer

Neutralizers for diesel engines are more complex than gasoline counterparts. This is explained by the features of the diesel engine itself, which runs on a lean mixture and emits more nitrogen oxides and soot particles.

Unlike gasoline engines, diesel engines are often equipped with a multi-stage cleaning system, including an oxidation neutralizer, a particulate filter, and a selective neutralization system (SCR). Each component is responsible for neutralizing certain harmful substances, which makes the system more efficient, but complicates maintenance.

Main differences from gasoline analogues

Diesel cleaning devices have several important features:

• The operating temperature range is significantly different from gasoline systems – diesel neutralizers begin to work effectively at lower temperatures due to the specifics of diesel combustion. However, this same feature makes them vulnerable to contamination, especially during short trips when the system does not reach the optimal temperature.
• The composition of the working layer in a diesel neutralizer contains more platinum and less rhodium compared to gasoline systems. This is due to the need to more actively oxidize unburned hydrocarbons, which are less in diesel exhaust, but they are more difficult to clean.

If problems arise, it is better to contact specialists who specialize in diesel systems, since their diagnostics have their own nuances.

Service life and signs of wear

Neutralizers for diesel engines usually last longer – about 150-200 thousand kilometers versus 100-150 for gasoline ones. The reason is lower operating temperatures and less thermal stress on materials.

However, diesel systems are more often affected by contamination with soot and oil deposits. Signs of wear can be increased fuel consumption, decreased engine thrust at low speeds and the appearance of a characteristic knock when the engine is running.

If such symptoms are detected, it is recommended to check the cleaning system. If the neutralizer needs to be replaced, do not rush to throw it away – the Avtokatalyst service will offer an assessment and buy out of old devices taking into account the content of precious metals.

Knowing the features of diesel neutralizers will help owners of such cars to properly maintain the cleaning system and extend its service life, which will have a positive effect on both the environmental friendliness and economy of the car.