Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hydraulic supply arrangement and control method

A technology of hydraulic supply and hydraulic circuit, applied in transmission control, transmission parts, components with teeth, etc., can solve problems such as single working point, increased wear of transmission components, and increased fuel consumption

Active Publication Date: 2017-08-01
ZF FRIEDRICHSHAFEN AG
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been found that in the known hydraulic supply devices there is the disadvantage that, by operating the regulating pump sufficiently stably, a single operating point can be determined in the best case
This increases the fuel consumption of the vehicle or causes increased wear on transmission components

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydraulic supply arrangement and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The supply device comprises a primary hydraulic circuit I for supplying the transmission components, for example shift elements A, B, C, D, E and the hydrodynamic coupling WK, as well as the parking lock PS.

[0022] The shifting elements A to E are supplied with hydraulic pressure via the primary hydraulic circuit I so that they can be engaged or disengaged. Furthermore, the fluid coupling and the parking lock PS are supplied with hydraulic medium in order to be engaged or disengaged by means of the engagement pressure Pein and the disengagement pressure Paus.

[0023] Furthermore, the supply device comprises a secondary hydraulic circuit II, which is supplied with hydraulic medium for lubricating and cooling the transmission components. A cooling device K is provided in the secondary hydraulic circuit II, from which it is supplied with a pressure p_zK, which is measured upstream of the cooler in the direction of flow. The hydraulic medium with the pressure p_vK measu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A hydraulic supply arrangement in an automatic gearbox of a vehicle, having a primary hydraulic circuit (I) for providing a supply to gearbox components, having a secondary hydraulic circuit (II) for lubricating and cooling gearbox components, and having at least one pump (P) for generating a delivery volume flow in the hydraulic circuits (I, II) is proposed, wherein a detection device (E) is provided for detecting the present hydraulic medium volume flow in the secondary hydraulic circuit (II) for the purposes of adjustment of a required delivery volume flow of the pump (P). Also proposed is a method for controlling a pump of a hydraulic supply arrangement in an automatic gearbox of a vehicle, wherein the respectively present hydraulic medium volume flow in a secondary hydraulic circuit (II) for lubricating and cooling gearbox components is detected, wherein a volume flow demand is determined from a characteristic map relating to the present working range of the automatic gearbox, and wherein the delivery volume flow of the pump (P) is controlled in a manner dependent on the determined volume flow demand.

Description

technical field [0001] The invention relates to a hydraulic supply device in an automatic transmission of a vehicle according to the type defined in detail in the preamble of claim 1 . Background technique [0002] For example, document US Pat. No. 4,693,081 discloses a method and an actuation system for actuating a hydraulic pump of an automatic transmission. By correspondingly evaluating the throttle valve sensor, the wheel speed sensor and the engine speed sensor, the pump supplying the automatic transmission with hydraulic medium is actuated as a function of the power of the internal combustion engine. The power of the hydraulic pump is essentially predetermined by the engine speed. [0003] The use of a regulating pump as a hydraulic pump for hydraulically supplying an automatic transmission is also disclosed. It has been found that in the known hydraulic supply devices there is the disadvantage that a single operating point can be determined in the best case by suffi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/00F16H57/04
CPCF16H57/0435F16H61/00F16H2061/0037F16H61/0009F16H61/0025F16H57/0436
Inventor A·汉德里希R·布劳恩T·罗泽T·施密特P·席勒F·迈尔
Owner ZF FRIEDRICHSHAFEN AG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com