Balanced binary pump for CVT transmission
AssigneeGM Global Technology Operations LLC
InventorsJohn C. Schultz, Daryl A. Wilton, Philip C. Lundberg
Life of this patent
Estimating the term…
Abstract
A flexible binary pump system for a motor vehicle transmission includes a shaft, a first vane pump mounted on the shaft and having a first rotor with a first diameter and a first width and a second vane pump mounted on the shaft and having a second rotor with a second diameter and a second width. The first vane pump provides hydraulic fluid to the transmission at a first pressure, and the second vane pump provides hydraulic fluid to the transmission at a second pressure. The first diameter, first width, second diameter, and second width are selected to optimize power consumption of the binary pump system and hydraulic fluid budget for the transmission.
Claims19
A flexible binary pump system for a motor vehicle transmission comprising:
- a shaft;
- a first vane pump mounted on the shaft, the first vane pump having a first rotor with a first diameter and a first width, the first vane pump providing hydraulic fluid to the transmission at a first pressure;
- and
- a second vane pump mounted on the shaft, the second vane pump having a second rotor with a second diameter and a second width, the second vane pump providing hydraulic fluid to the transmission at a second pressure, the first diameter, first width, second diameter and second width being selected to optimize power consumption of the binary pump system and hydraulic fluid budget for the transmission;
- a first pressure regulator valve that receives hydraulic fluid from the first pump or a combination of hydraulic fluid from the first pump and from the second pump, the first pressure regulator valve providing the hydraulic fluid from the first pump to a first portion of the transmission or the combination of hydraulic fluid from the first pump and the second pump to the first portion and to a second portion of the transmission;
- and
- a second pressure regulator valve that receives hydraulic fluid from the second pump and provides the hydraulic fluid from the second pump to the second portion of the transmission.
A hydraulic control system of a motor vehicle transmission comprising:
- a binary pump including a first pump and a second pump;
- a first pressure regulator valve that receives hydraulic fluid from the first pump or a combination of hydraulic fluid from the first pump and from the second pump, the first pressure regulator valve providing the hydraulic fluid from the first pump to a first portion of the transmission or the combination of hydraulic fluid from the first pump and the second pump to the first portion and to a second portion of the transmission;
- and
- a second pressure regulator valve that receives hydraulic fluid from the second pump and provides the hydraulic fluid from the second pump to the second portion of the transmission.
Dependencies are inferred from the claim text.