EGR valves and coolers from VEMO
Less emissions, more power: Why VEMO EGR valves and EGR coolers are the best solution for the workshop!
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Emission control and the optimisation of engine performance play a central role in modern vehicles. The exhaust gas recirculation system (EGR system) makes a decisive contribution to reducing harmful nitrogen oxides (NOx) and lowering the combustion temperature. Exhaust gas recirculation (EGR) directs already burnt exhaust gases back into the combustion chamber, which means that less oxygen is available and the combustion temperature drops – an important measure to fulfil current emissions standards.
VEMO offers a wide range of high-quality EGR valves and EGR coolers. They are characterised by high quality standards and broad vehicle compatibility, making them the ideal choice for independent workshops. In this article, you will find out how the EGR system works, why it often makes more sense to replace an EGR valve than to clean it and how VEMO products can make everyday life in the workshop easier.
What is the EGR system and how does it work?
The exhaust gas recirculation system (EGR system) is an essential element of modern vehicle technology that contributes to the reduction of emissions. Its task is to return some of the exhaust gases that are normally expelled via the exhaust system back into the combustion chamber. This process has several advantages:
Reduction of nitrogen oxides (NOx)
Exhaust gas recirculation reduces the oxygen content in the combustion chamber. This leads to a lower combustion temperature, which significantly reduces the formation of nitrogen oxides. Nitrogen oxides are harmful emissions that are released into the environment and contribute to air pollution.
Improving fuel consumption
An optimally functioning EGR system can increase the efficiency of the engine by optimising the combustion temperature and reducing fuel consumption. This is particularly important in times of rising fuel prices and increasing environmental regulations.
Reduction of pollutant emissions
In addition to reducing NOx emissions, the EGR system also helps to minimise other pollutants produced during the combustion process.
The EGR system consists of several components, including the EGR valve, which controls the amount of recirculated exhaust gases, and the EGR cooler, which cools the exhaust gases before they are returned to the engine. The EGR valve opens and closes electrically or pneumatically to regulate the amount of exhaust gas according to the engine conditions. At low engine speeds or load conditions, the valve is usually open to recirculate the exhaust gases. At high engine speeds, on the other hand, it often remains closed in order to maximise engine performance. By combining these processes, the EGR system plays a key role in reducing a vehicle’s emissions while improving performance and efficiency.
Reasons for failure of EGR valves and heat exchangers
Unfortunately, EGR systems can fail for various reasons. The most common causes are
❌ Contamination: Soot and carbon deposits can clog the valve and lead to malfunctions.
❌ Defective seals: Wear or damage to the seals can lead to leaks that impair the performance of the system.
❌ Electrical problems: Defective sensors or electrical connections can impair the function of the valve and lead to malfunctions.
❌ Mechanical damage: Physical damage due to overheating or other mechanical influences can impair the EGR valve and the heat exchanger.
❌ Faulty control system: Problems in the engine control system can result in the EGR valve not being controlled correctly, which reduces the efficiency of the overall system.
EGR valve and heat exchanger – technical advantages
The EGR valve in conjunction with a heat exchanger offers numerous technical advantages. This combination not only optimises the performance of the EGR system, but also improves the efficiency and reliability of the entire engine. The most important advantages are:
✅ Efficient flue gas cooling
The heat exchanger ensures that the recirculated exhaust gases are effectively cooled before being returned to the combustion chamber. This leads to a further reduction in combustion temperatures, which further minimises the formation of nitrogen oxides (NOx). Cooler exhaust gases contribute to more stable and controllable combustion.
✅ Longer service life of the components
Constant cooling of the exhaust gases reduces the risk of overheating and therefore damage to engine components. This can extend the service life of the EGR system and the engine as a whole and reduce expensive repairs.
✅ Improved engine performance
The EGR valve with heat exchanger optimises exhaust gas recirculation depending on the current operating conditions of the engine. This leads to more efficient combustion, which improves the engine’s performance and response behaviour. A well-tuned EGR system can therefore also have a positive effect on driving dynamics.
✅ Reduction of deposits
The cooling properties of the heat exchanger minimise the formation of deposits in the EGR system. This is particularly important, as deposits can impair the function of the EGR valve and lead to poor performance or even failure.
Installation instructions for the EGR valve
Fitting a new EGR valve can be relatively straightforward if you follow the correct steps.
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Remove the old EGR valve: Locate the EGR valve in the engine compartment (near the intake manifold or exhaust system). Undo the screws or clamps and remove it carefully to avoid contaminating the system.
Clean the connections: Thoroughly clean the connections and sealing surfaces. Remove old gaskets or residues to ensure a tight connection.
Insert new EGR valve: Insert the new VEMO EGR valve correctly and use the new gaskets. Tighten the screws to the recommended torque without overtightening them.
Check electrical connections: Check all electrical connections for tightness and corrosion. A secure connection is important for the function of the valve.
EGR valves, EGR coolers and EGR modules from VEMO – the best choice for the workshop
Choosing the right EGR valve and cooler is crucial for vehicle efficiency and compliance with emissions standards.
EGR valves and coolers from VEMO offer many advantages for independent workshops.
✅ EGR valves including gaskets
Many of our EGR valves are supplied as Expert Kits+, which include all the necessary seals. This not only ensures an optimum fit, but also makes installation easier, as all the necessary parts are included in one kit.
✅ Also available as an EGR module
The VEMO EGR modules offer a combination of valve and cooler in practical Expert Kits+ – ideal for comprehensive repairs where the EGR system needs to be completely replaced.
✅ High quality standards
VEMO EGR valves and EGR coolers are manufactured to the highest quality standards and fulfil the strict requirements of the automotive industry. VEMO products undergo extensive testing to ensure that they fulfil the specific requirements for functionality and durability.
✅ Wide vehicle coverage
VEMO offers EGR valves and EGR coolers that are suitable for a wide range of vehicle makes and models.
The EGR system plays a very important role in modern vehicles in order to reduce emissions and minimise environmental pollution. With the high-quality EGR valves and EGR coolers from VEMO, you can offer your customers the best possible solutions for their vehicles. By replacing old or defective EGR valves, you not only ensure the efficiency of the engine, but also contribute to a more sustainable driving style. VEMO products offer you high quality, broad vehicle coverage and easy installation. Discover the extensive range.
