The function of piston cooling fuel injector
When the engine is running, the top of the piston is directly subjected to the impact of high-temperature gas above 2000 ℃ in the combustion chamber.
1. Efficient heat dissipation and suppression of thermal deformation
When the engine is running, the top of the piston is directly subjected to the impact of high-temperature gas above 2000 ℃ in the combustion chamber. If the heat cannot be dissipated in time, it is easy to cause the thermal expansion of the piston to exceed the standard, leading to cylinder pulling or piston ring jamming. The cooling nozzle atomizes the oil through a high-pressure oil pump and sprays it into the piston cavity or bottom, using the fluidity of the oil to remove more than 60% of the heat from the piston surface, keeping the piston temperature within a reasonable range and avoiding mechanical failure caused by thermal stress.
2. Strengthen lubrication and reduce friction loss
The sprayed oil will form a continuous oil film between the piston ring and the cylinder wall, filling the micro gaps of the friction pair, converting dry friction into fluid lubrication, significantly reducing the frictional resistance of the piston components. Data shows that engines equipped with cooling nozzles can reduce the wear rate of piston rings and cylinder liners by more than 30%, effectively extending the service life of core components.
3. Dynamic adaptation, optimizing working condition performance
The cooling nozzles of some high-end engines have intelligent adjustment functions. The ECU will adjust the oil injection amount and pressure in real time based on the engine speed, load, and water temperature signals: reduce the injection amount during idle or low-speed cruising to reduce the energy consumption of the oil pump; Increase the spray volume during high-speed or high load conditions to enhance the heat dissipation effect. This dynamic control mechanism not only improves fuel economy but also ensures reliability under extreme working conditions.
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