Pilot-controlled coolant valve

US11822357B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventor

• Sebastian Hurst · Bubenreuth, DE

Key dates

• Filing date: Mar 12, 2020
• Grant date: Nov 21, 2023
• Expiry date: Jul 6, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01P2007/146
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pilot-controlled coolant valve is provided that includes a pressure chamber, a pressure release chamber, a control opening, a pressure release channel, an actuator having a plunger, a control piston stroke-actuated by the plunger, a closing piston moving in the pressure chamber, and a valve seat. The pressure chamber has an in-flow and an out-flow for coolant. The control opening connects the pressure release chamber to the pressure chamber. The control piston closes the control opening during the stroke actuation by the plunger, except for a radial sealing gap between the control piston and the control opening. When the control opening is closed, the closing piston sealingly rests on the valve seat and interrupts the connection of the through-flow chamber with the in-flow. Axial end sides of the closing piston delimit a stagnation pressure chamber on one side and a through-flow chamber on the other side.