Development of Intercooler Hose for Future Engine
Turbocharged diesel engines with an intercooler are widely used in modern heavy-duty commercial vehicles to achieve both cost performance and durability. These engines have low CO2 emissions due to their high thermal efficiency, and are essential to the movement of people and goods. Given the high compression ratio and supercharging requirements of diesel engines, further improvements in thermal efficiency require enhancing the performance of existing intercooler hoses. Intercooler hoses made of fluororubber (FKM) and silicone rubber (VMQ) have high heat resistance and durability. However, future diesel engines will be subject to more severe operating conditions. This research identified the deterioration in the mechanical properties of FKM in hot environments as an issue to resolve for intercooler hoses in future engines. Specific improvement efforts focused on the low heat resistance of crosslinking points inside FKM.