Unlock instant, AI-driven research and patent intelligence for your innovation.

Pneumatic Control Scheme

A technology for control equipment and control systems, which is applied in the direction of transmission control, fluid pressure actuation device, fluid pressure actuation system components, etc.

Active Publication Date: 2020-06-05
ZF FRIEDRICHSHAFEN AG
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such sensors are costly and can fail
Known techniques for controlling steering forces without sensors have never been good enough
Furthermore, the actuation times of the valves must frequently be determined empirically for such methods, thus necessitating time-consuming calibrations of the methods

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
  • Pneumatic Control Scheme
  • Pneumatic Control Scheme
  • Pneumatic Control Scheme

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] figure 1 A control system 100 is shown for a shift transmission 105 . In particular, shift transmission 105 can be arranged in a drive train of a motor vehicle. For example, shift transmission 105 includes a main transmission 110 and a range group 115 and is configured for use in a commercial vehicle. For shifting in or out of a gear in the main transmission 110 or in the range group 115 , an actuating device 120 is provided in each case, which includes a cylinder 125 and a piston 130 . Basically any operating device 120 can be used for the technique described here and not only one of the operating devices shown as an example here. The design of the shift transmission 105 can differ from the design described.

[0024] In the illustrated embodiment, the actuating device 120 assigned to the main transmission 110 includes, in addition to the piston 130 , a traction piston 135 . The piston 130 acts on the corresponding transmission part 110 , 115 , for example via a pis...

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

The invention relates to a pneumatic control concept in which the actuating device (120) comprises a cylinder (125) and a piston (130), which closes the cylinder (125) in a displaceable manner. The mass flow of air at a predetermined pressure into the cylinder (125) can be controlled by means of the valve (155). A method (200) for controlling an actuation force (F_act) provided by means of a pneumatic actuation device (120), the method comprising the steps of: scanning (205) the movement of a piston (130) in a cylinder (125) position; determine (210) air mass flow into cylinder (125); determine (220) pneumatic pressure in cylinder (125) based on mass flow and position (150); determine (220) air pressure in cylinder (125) based on pressure and active piston surface providing an actuating force (F_act) on the piston (130); and controlling (225) the actuation of the valve (155) depending on the provided actuating force (F_act) and the desired actuating force (F_soll).

Description

technical field [0001] The invention relates to a pneumatic control scheme. In particular, the invention relates to a concept for the pneumatic control of processes in a shift transmission. Background technique [0002] In mechanically shifted transmissions, for example in the drive train of a motor vehicle, different gear stages can be engaged. Engaging or disengaging a gear can be realized by means of a pneumatic actuating device comprising a cylinder and a piston movably accommodated in the cylinder. In this case, the piston acts via the piston rod on the actuating element, the position of which determines whether a gear is engaged or disengaged. A compressed air source provides air at a predetermined constant pressure. Air can be released from the compressed air source into the cylinder by means of the valve, so that the pressure in the cylinder increases and a force is exerted on the piston, which is transmitted to the actuating element. [0003] The actuation of th...

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 Patents(China)
IPC IPC(8): F16H61/30F16H61/00
CPCF16H61/0009F16H61/0021F16H61/30F16H61/28F15B11/028F16H2061/2823F16H2061/0093F16H61/2807F16H2059/683F15B19/007F15B21/087F15B2211/3057F15B2211/327F15B2211/328F15B2211/50554F15B2211/6309F15B2211/6313F15B2211/6336F15B2211/6653F15B2211/6656F15B2211/7053F15B2211/7055F15B2211/76F15B2211/8855
Inventor 阿兰·蒂尔里·查马肯坎德威廉·莫泽
Owner ZF FRIEDRICHSHAFEN AG