In the automatic wave box repair industry, controlling the renovation rate is always one of the factors that people care about, because it is directly related to the profit of the enterprise, the brand of the company and the development prospect of the business. However, this is a difficult problem to solve. If the repair is limited to the surface and the root cause of the internal fault of the transmission is not found, the repair rate is very difficult to control, especially when the transmission enters the normal maintenance period and the internal fault begins to appear.

要做到正確的故障分析和成功的變速箱翻新，理解變速箱內的一個重要的油路循環是尤其關鍵的：油泵-主調壓閥-變扭器-散熱器潤滑回路。從圖1可以看到，油泵/調壓閥和變て鶻?潤滑油路實際上處于串聯關系，按先后次序聯系在一起的。

In order to achieve correct fault analysis and successful gearbox renovation, it is particularly critical to understand an important oil circuit cycle in the gearbox: oil pump - main pressure regulating valve - torque converter - radiator lubrication circuit. As can be seen from Figure 1, the oil pump / pressure regulating valve and the transformer are connected? In fact, the lubricating oil circuit is in series and connected in sequence.

這其中的任一部分出現變化，都會直接影響到其它的部分。這里我們將要深入探討這些系統是如何相互聯系在一起的，以及如何用流量計（SonnaFlow®）來幫助監測它們的運行，同時也更容易理解索奈克斯的閥體零件是如何修復變速箱內的液力回路使其正常工作的。

If any part of this changes, it will directly affect other parts. Here we are going to explore how these systems are interconnected and how to use the Sonna flow meter ®） To help monitor their operation, and at the same time, it's easier to understand how Sonex's valve body parts repair the hydraulic circuit in the gearbox to make it work properly.

調壓閥（以下稱“PR閥”）是這個油路循環中的核心部件。液力泵可以產生非常大的油壓，PR閥能將油壓限 制或調節在變速箱中通常的50-250psi（磅/平方英寸，美制壓力單位）的范圍內。受調制的主油路壓力的變化范圍是由分別位于PR閥兩端的彈簧和油路壓力共同決定的。

Pressure regulating valve (hereinafter referred to as "PR valve") is the core component of the oil circuit cycle. The hydraulic pump can produce very large oil pressure, and the PR valve can limit or regulate the oil pressure within the range of 50-250psi (pounds per square inch, American pressure unit) in the transmission. The variation range of the modulated main oil pressure is determined by the spring and oil pressure at both ends of the PR valve.

在通常情況下，PR彈簧和增壓閥推動PR閥向一個方向運動，而閥另一端的平衡壓力阻止或方向推動PR閥，從而使PR閥處于一個平衡調節位置。在啟動時，當PR閥平衡端的油壓達到后，PR閥會克服彈簧（以及增壓閥）的壓力，朝它的平衡調節位置移動。一旦油泵產生了足夠大的油路壓力將PR閥推入它的平衡調節位置，PR閥會將多余的油泵容量導入泄油孔，或導回油泵的吸入端

Under normal circumstances, the PR spring and the booster valve push the PR valve to move in one direction, while the balance pressure at the other end of the valve prevents or pushes the PR valve in the other direction, so that the PR valve is in a balance adjustment position. During start-up, when the oil pressure at the balance end of PR valve reaches, PR valve will overcome the pressure of spring (and booster valve) and move towards its balance adjustment position. Once the oil pump generates enough oil pressure to push the PR valve into its balance adjustment position, the PR valve will lead the excess oil pump capacity into the drain hole or back to the suction end of the oil pump