CONSTRUCTION MACHINE WITH AUTOMATIC FAN ROTATIONAL SPEED REGULATION

• US 20130089375A1
• Filed: 10/09/2012
• Published: 04/11/2013
• Est. Priority Date: 10/07/2011
• Status: Active Grant

• Current Assignee: Joseph Vã¶Gele AG (Deere & Company)
• Original Assignee: Joseph Vã¶Gele AG (Deere & Company)
• Inventors: Weiser, Ralf, Riedl, Thomas, Noll, Tobias
• Granted Patent: US 9,670,930 B2
• Time in Patent Office: Days
• US Class Current: 404/84.05
• CPC Class Codes: E01C 19/00 Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving surface stabilisation E01C21/00; apparatus specially adapted for reconditioning or repairing paving E01C23/00
• CPC Class Codes: E01C 19/48 for laying-down the materials and consolidating them, or finishing the surface , e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ E01C19/002, E01C23/065 take precedence; devices for guiding or controlling the machines along a predetermined path E01C19/004
• CPC Class Codes: F04D 15/0066 by changing the speed, e.g. of the driving engine
• CPC Class Codes: F04D 27/004 by varying driving speed
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The present invention relates to a construction machine with automatic fan rotational speed regulation. The construction machine includes at least one electric motor that is connected functionally to a respective fan and a control unit formed for the purpose of registering operation-specific data. The control unit is configured for the purpose of regulating, depending on the operation-specific data, an electric output of the respective electric motor in order to adjust a desired target fan rotational speed on the fan.

Claims

1. Construction machine with automatic fan rotational speed regulation comprising a drive unit, a control unit configured for the purpose of registering operation-specific data and, a cooling unit that comprises at least one fan in order to produce a cooling airflow wherein

the cooling unit comprises at least one regulatable electric motor) that is functionally connected to the respective fan and

the control unit being configured for the purpose of regulating based on specific operating data of the construction machine an electric output of the respective electric motor in order to adjust a desired target fan rotational speed on the fan.

2. Construction machine according to claim 1, wherein the control unit is configured for the purpose of registering a load factor and/or a rotational speed of the drive unit by means of the operation-specific data.

3. Construction machine according to claim 1, wherein the control unit is configured for the purpose of registering an intake temperature and/or an ambient temperature of the construction machine by means of the operation-specific data.

4. Construction machine according to claim 1, wherein the control unit is configured for the purpose of registering at least one of a charge air temperature, cooling air temperature and/or hydraulic oil temperature in response to receipt of the operation-specific data.

5. Construction machine according to claim 1, wherein the control unit comprises at least one mapping which is provided for determining the target fan rotational speed.

6. Construction machine according to claim 5, wherein based on the rotational speed of the drive unit, the control unit is configured for the purpose of activating a predetermined mapping in order to determine the target fan rotational speed.

7. Construction machine according to claim 6, wherein the control unit is configured to determine the target fan rotational speed based on the predetermined mapping in light of particular operation-specific data particularly in light of the load factor of the drive unit and in light of the ambient temperature.

8. Construction machine according to claim 6, wherein the control unit determines the target fan rotational speed by means of the predetermined mapping in light of the charge air temperature, cooling air temperature and/or hydraulic oil temperature.

9. Construction machine according to claim 1, wherein the control unit comprises power electronics that supply the electric motor with a predetermined voltage in light of the determined target fan rotational speed.

10. Construction machine according to claim 1, wherein the control unit comprises an instrument that is formed for the purpose of subjecting the operation-specific data registered by means of the control unit to averaging.

11. Construction machine according to claim 10, wherein the instrument is formed for the purpose of registering at least ten, preferably at least twenty, operation-specific data in order from them to form an average.

12. Construction machine according to claim 1 wherein the control unit comprises an instrument for attenuation that is formed for the purpose of adjusting the target fan rotational speed smoothly, without steps.

13. Construction machine according to claim 1, that the control unit comprises a memory that is formed for the purpose of storing particular operation-specific data during the operation of the construction machine.

14. Construction machine according to claim 2, wherein the cooling unit comprises a sensor that is formed for the purpose of registering the actual fan rotational speed and forwarding this to the control unit.

15. Method for the automatic regulation and control of a cooling system of a construction machine which comprises providing a control unit that registers operation-specific data of the construction machine and, determines based on the registered data a desired target fan rotational speed, and supplying from the control unit an electric motor that is provided for the cooling system with a regulatable voltage in order to achieve the desired target fan rotational speed on a fan connected to the electric motor.

16. A road paving machine comprising:

a plurality of operational components for depositing a paving layer on the road surface,

a drive unit,

a control unit that collects and registers operation specific data on the performance of the road paving machine, and

a cooling unit comprising at least one adjustable speed electric motor connected to at least one fan for cooling the operational components of the road paving machine,

the control unit regulating the electric output of the respective electric motor in response to operation specific data collected and registered by the control unit to set the rotational speed of the fan to a speed corresponding to the operation specific data on the performance of the road paving machine.