Device for attenuating the pitching of an engine-driven vehicle

• US 20030014167A1
• Filed: 08/19/2002
• Published: 01/16/2003
• Est. Priority Date: 03/01/2000
• Status: Active Grant

• Current Assignee: Danfoss Power Solutions ApS (Danfoss A/S)
• Original Assignee: Sauer-Danfoss Holding APS (Bitten Og Mads Clausens Fond)
• Inventors: Lindholdt, Per Nielsen, Pedersen, Soren, Flintholm, Asger, Friedrichsen, Welm
• Granted Patent: US 6,654,675 B2
• Time in Patent Office: Days
• US Class Current: 701/37
• 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. Device for damping the pitching of an engine-driven vehicle with a chassis and axles, of which at least one is mounted fixedly on the chassis, and with flexible tyres, characterised in that the torque of at least one of the wheels (4) supported on the axles (5) can be influenced in dependence of a measure of the pitching of the vehicle (21) in such a way that the pitching is damped.

2. Device according to claim 1, characterised in that one of the following entities serves as measure for the pitching:

the operating pressure of at least one hydraulic engine (6, 19) driving at least one of the axles (5),

the torque of at least one electric or combustion engine driving at least one of the axles,

the pressure or the piston position in a working cylinder (13), particularly the boom cylinder, of a working device (11) mounted on the vehicle (21),

the tyre pressure, or

the angular acceleration of a vehicle part (2, 22) around the pitching axis (23).

3. Device according to claim 1 or 2, characterised in that the torque of at least one of the wheels (4) can be influenced by a change of

the torque of a driving engine (6, 19) of at least one axle (5),

the operating voltage or the operating frequency of an electric driving engine of at least one axle (5),

the gear ratio of a gear transmission between driving engine(s) and axle(s) or

the braking power of at least one brake of a braking system of the vehicle.