Aiming at the problems of difficult adjustment and maintenance of diesel engine valve clearance and high cost,taking a four-cylinder diesel engine non-road China IV emission upgrade project as an example,simulation and design improvement of the diesel engine's gas distribution mechanism were carried out.The mechanical rocker arm was changed to a hydraulic rocker arm,and the performance test and durability test were used to verify.The results show that after the design improvement,the valve lash of this diesel engine can be maintenance-free,which not only meets the requirements of customers,but also reduces the production and maintenance costs and improves the reliability and stability of the whole engine.
diesel enginevalve distribution mechanismvalve clearancehydraulic rocker armdesign improvement
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