QR025CHA

1. Exclusive Adaptation for Chery CVT Models, OEM-Level Precise Compatibility

As a core control component for specific CVT (Continuously Variable Transmission) systems in Chery models (such as Arrizo 5, Tiggo 7, etc.), the QR025CHA transmission valve body is developed in strict compliance with Chery's original equipment manufacturer (OEM) technical specifications. The oil passage diameter of the valve plate and spool stroke are perfectly matched with the torque converter and steel belt drive mechanism of the CVT, and its interface specifications achieve seamless connection with the Transmission Control Unit (TCU).

It can be directly installed without additional cutting or modification, effectively avoiding common issues of non-adaptive valve bodies such as oil leakage and speed ratio adjustment deviation, and ensuring the CVT regains its original smooth transmission efficiency. It is particularly suitable for scenarios such as replacing old valve bodies and troubleshooting repairs. After installation, it can operate stably without repeated debugging, meeting the after-sales maintenance and OEM replacement needs of Chery models.

2. Linear Hydraulic Regulation, Enhanced Smoothness of CVT Speed Ratio Adjustment

Targeting the characteristic of "no fixed gears, continuous speed ratio switching" of CVTs, it adopts a combined design of 8 sets of high-precision solenoid valves and linear pressure regulating valves. It can real-time capture dynamic parameters such as engine load, vehicle speed, and throttle opening, and fine-tune the hydraulic oil pressure with an accuracy of ±0.12MPa.

Compared with ordinary valve bodies, the speed ratio adjustment response speed is increased by 28%, and it can complete speed ratio switching within 60-160 milliseconds, completely eliminating the "jitter" of CVTs during low-speed driving. At the same time, by optimizing the hydraulic control logic of the steel belt clamping force, slipping during transmission is avoided. Whether it is frequent start-stops in urban congested road conditions or stable acceleration during high-speed cruising, a "gap-free" smooth driving experience can be maintained, meeting the core comfort needs of household vehicles.

3. Weather-Resistant Materials and Precision Craftsmanship, Extended CVT Service Life

The core valve plate is made of high-strength ZL109 aluminum alloy, undergoing T6 heat treatment (solution temperature: 540℃, aging temperature: 170℃) and surface hard anodization (anodized layer thickness: 12-16μm). Its hardness is increased to over HV720, enabling it to withstand high-frequency oil pressure impacts (maximum pressure resistance: 28MPa) during CVT operation, effectively resisting valve body deformation and oil passage wear.

The internal spool uses a SUS316L stainless steel substrate with a titanium nitride (TiN) coating, reducing the friction coefficient by 40% and minimizing the risk of spool jamming during long-term use. The sealing components are made of perfluoroelastomer (FFKM) that is oil-resistant, high-temperature-resistant, and low-temperature-resistant (-40℃~145℃), with a compression set rate of less than 10%, preventing transmission oil leakage and avoiding severe wear of core CVT components such as the steel belt and planetary gears due to oil shortage. According to third-party testing, the service life of this valve body is 48% longer than that of ordinary similar products, making it suitable for long-term and high-frequency use of CVTs.