HögtrycksEGR

HögtrycksEGR, or high‑pressure exhaust gas recirculation, is an advanced variant of the conventional EGR system used in internal combustion engines. In this system, exhaust gases are recirculated back into the intake manifold under pressures that are significantly higher than those encountered in standard EGR setups. The higher compression of the recirculated gases improves mixing with the incoming charge, which helps to lower peak combustion temperatures and consequently reduces the formation of nitrogen oxides (NOx).

By maintaining a higher pressure on the EGR stream, engines can operate with a more efficient combustion process while still achieving low emissions. The system typically includes a dedicated high‑pressure recovery valve, a heat‑shielded piping network, and a pre‑filter to remove particulates before the gases re‑enter the intake manifold. The high‑pressure line also allows for greater flexibility in controlling the mass of recirculated gas, enabling more precise tuning of combustion characteristics across different engine load and speed ranges.

The benefits of högtrycksEGR include tighter NOx enforcement compliance, improved fuel economy, and reduced need for after‑treatment devices such as selective catalytic reduction (SCR) units. However, the added complexity can increase manufacturing cost and maintenance requirements. High‑pressure EGR is increasingly employed in modern automotive and heavy‑duty diesel engines as regulators worldwide push for stricter emission standards.