Device for attenuating the pitching of an engine-driven vehicle

• US 6,654,675 B2
• Filed: 08/19/2002
• Issued: 11/25/2003
• Est. Priority Date: 03/01/2000
• Status: Expired due to Term

• Current Assignee: Danfoss Power Solutions ApS (Danfoss A/S)
• Original Assignee: Sauer-Danfoss Holding APS (Bitten Og Mads Clausens Fond)
• Inventors: Pedersen, Søren, Friedrichsen, Welm, Lindholdt, Per Nielsen, Flintholm, Asger
• Primary Examiner(s): Camby, Richard M.
• Application Number:
  US10/204,231
• Publication Number:
  US 20030014167A1
• Time in Patent Office: 463 Days
• Field of Search: 701/101, 701/36, 701/70, 701/38, 701/71, 701/99, 280/55
• US Class Current: 701/36
• CPC Class Codes: B60G 2300/09 Construction vehicles, e.g. graders, excavators
• CPC Class Codes: B60G 2400/0512 Pitch angle
• CPC Class Codes: B60G 2800/014 Pitch; Nose dive
• CPC Class Codes: B60G 2800/182 Traction
• CPC Class Codes: B60G 2800/952 Electronic driving torque distribution
• CPC Class Codes: F16F 15/00 Suppression of vibrations in systems damping of non-rotary systems using inertia effect F16F7/10; prevention or isolation of vibrations in machine tools B23Q11/0032; suppression of driveline vibrations in hybrid vehicle transmissions B60W30/20 ; vehicle seat suspension devices B60N2/50; methods or devices for protecting against, or damping of, acoustic waves, e.g. sound G10K11/16; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion vibration absorbing or balancing means for aircraft propellers B64C11/008, for rotorcraft rotors B64C27/001 ; testing static and dynamic balance of machines or structures G01M1/00
• CPC Class Codes: F16H 2057/0012 for reducing drive line oscillations
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

The invention relates to a device for damping the pitching of an engine-driven vehicle with a chassis and axles 5, at least one of which is mounted fixedly on the chassis. The aim of the invention is to provide a simplified corresponding device. To this end, the torque of at least one wheel borne on the axles (5) is influenced on the basis of the size of the pitching in such a way that the pitching. is damped.

Claims

1. A device for damping the pitching of an engine driven vehicle having a chassis with axles, of which at least one axle is mounted fixedly on the chassis, and with wheels mounted on the axles having tires comprising:

a pitch detecting device mounted to the chassis;

a control means for controlling the wheel speed operably connected to the pitch detecting device; and

said control means operably connected to the wheels of the chassis.

2. The device of claim 1 where in the pitch detecting device detects pitch from the operating pressure of at least one hydraulic engine driving at least one of the axles.

3. The device of claim 1 wherein the pitch detecting device detects pitch from the torque of an engine driving at least one of the axles.

4. The device of claim 1 wherein the pitch detecting device detects pitch from a piston position in a working boom cylinder.

5. The device of claim 1 wherein the pitch detecting device detects pitch from the pressure of at least one tire.

6. A device for damping the pitching of an engine-driven vehicle having a chassis with axles, of which at least one axle is mounted fixedly on the chassis, and with wheels mounted on the axles having tires comprising:

an electronic pitch sensing device mounted onto the chassis;

a hydraulic pump operably connected the electronic sensing device so as to receive signals from the electronic sensing device; and

a hydraulic engine operably connected and controlled by the hydraulic pump and operably connected to the wheels of the chassis.

7. A device for damping the pitching of an engine-driven vehicle having a chassis with axles, of which at least one axle is mounted fixedly on the chassis, and with wheels mounted on the axles having tires comprising:

an electronic pitch sensing device mounted onto the chassis;

a hydraulic pump operably connected the electronic sensing device so as to receive signals from the electronic sensing device;

a 2/2-way valve operably connected to the hydraulic pump;

a hydraulic engine operably connected to the 2/2-way valve so that a hydraulic circuit is formed can be opened when the pressure in the 2/2-way valve reaches a threshold value; and

said hydraulic engine operably connected to the wheels of the chassis.

8. A device for damping the pitching of an engine-driven vehicle having a chassis with axles, of which at least one axle is mounted fixedly on the chassis, and with wheels mounted on the axles having tires comprising:

an electronic pitch sensing device mounted onto the chassis;

a hydraulic pump operably connected the electronic sensing device so as to receive signals from the electronic sensing device;

a 4/2-way valve operably connected to the hydraulic pump;

a first hydraulic engine operably connected to the 4/2-way valve;

a second hydraulic engine operably connected to the 4/2-way valve;

said first hydraulic engine, second hydraulic engine, and 4/2-way valve forming a circuit so that when pressure in the 4/2-way valve reaches a threshold value the said first hydraulic engine will be disconnected from the circuit; and

said circuit operably connected to the wheels of the chassis.