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1. Household-Level Durable Craftsmanship, Outstanding Cost-Effectiveness

The valve core is made of martensitic stainless steel (material: 4Cr13), treated by "ordinary quenching + precision grinding", with a surface roughness of ≤ Ra0.03μm and a surface hardness of over HV900. Its wear resistance meets the annual driving demand of 15,000-20,000 kilometers for family vehicles and can resist long-term scouring by hydraulic oil (ATF WS oil service life ≥ 60,000 kilometers); the coil uses polyester enameled copper wire resistant to 180℃ high temperature, covered with a nitrile rubber insulation layer, which has basic oil resistance and anti-aging properties to prevent short circuits caused by oil penetration in daily use. Through 1 million cycles of action testing (simulating a 10-year/150,000-kilometer household usage scenario), the failure rate is ≤ 0.8%, and the service life can reach more than 150,000 kilometers under normal use, meeting the "long-term durability" demand of family vehicles.

2. Adaptation to All Household Scenarios, No Usage Restrictions

Targeting scenarios such as "urban areas, suburbs, short-distance trips" for family vehicles, it optimizes environmental adaptability: in low-temperature environments (-35℃ to -10℃), the coil adopts a "low-resistance design" and can heat up to the working temperature (≥ 45℃) within 5 seconds after being energized, avoiding shifting jamming during cold startup in winter; in high-temperature environments (above 40℃), the valve body shell is equipped with simple heat dissipation ribs, which cooperate with the transmission cooling system to stabilize the working temperature of the solenoid valve within the r