New ambulance for Alsip (more)

Here are some photos taken by Larry Shapiro of Alsip's newest ambulance.

Alsip Ambulance 2042 – A 2017 Ford E450 chassis equipped with a 2018 Road Rescue Type III ambulance, unit number 251215.

This new ambulance is a significant upgrade for the Alsip Fire Department, offering enhanced safety and comfort for both patients and crew. The sleek design includes modern lighting and reflective striping, making it highly visible on the road. The lighted rub rail adds an extra layer of safety during emergency response. These images give a great view of the vehicle's features and how it stands out from previous models.

Piston Ring

Piston ring is used to insert the piston groove inside the metal ring, piston ring is divided into two types: compression ring and oil ring.

The compression ring can be used to seal the combustible mixture gas in the combustion chamber; The oil ring is used to scrape excess oil from the cylinder.

Commonly used car engines have two kinds of diesel and gasoline engines, because of their different fuel performance, the use of piston rings are not the same.

Early piston rings were formed by casting, but with the progress of technology, high-power steel piston rings were born, and with the continuous improvement of engine functions and environmental requirements, a variety of advanced surface treatment applications, such as thermal spraying, electroplating, chromium plating, gas nitriding, physical deposition, surface coating, zinc-manganese phosphating treatment, etc., the function of the piston ring is greatly improved.

Piston ring function includes sealing, regulating oil (oil control), heat conduction (heat transfer), guidance (support) four roles.

Sealing: refers to sealing gas, do not let the combustion chamber gas leakage to the crankcase, the gas leakage is controlled at a minimum, improve thermal efficiency.

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