Tractor control/display systems

Patent metadata

Field	Value
Publication number	US-2016016470-A1
Application number	US-201514747959-A
Country	US
Kind code	A1
Filing date	Jun 23, 2015
Priority date	Mar 25, 2014
Publication date	Jan 21, 2016
Grant date	—

Abstract

A tractor control/display system includes a display means for displaying to a tractor operator tractor performance parameters and receiving operator's inputs. Sensors are also provided to determine various operating conditions of the tractor, and a processing unit for receiving the sensor signals and operator's inputs and processing these signals and inputs to provide selected performance parameters for display on the display means. The processing means also provides a simulation mode in which the operator can enter proposed changes in operating conditions of the tractor and the processing means can indicate on the display means the effect of these proposed changes on selected tractor performance parameters.

First claim

What is claimed is:

1 . A tractor control and display system for a tractor with two or more axles which carry wheels having pneumatic tires, the system including a display terminal for displaying to a tractor operator tractor performance parameters and receiving operator's inputs, sensors to determine various operating conditions of the tractor, and a processing unit for receiving the sensor signals and operator's inputs and processing these signals and inputs to provide selected performance parameters for display on the display terminal, the processing unit also providing a simulation mode in which the operator can enter proposed changes in operating conditions of the tractor and the processing unit can indicate on the display terminal the effect of these proposed changes on selected tractor performance parameters.

2 . The system according to claim 1 in which the display terminal advises the operator on changes which can be made to the operating conditions of the tractor to improve operating efficiency.

3 . The system according to claim 2 in which the display terminal differentiates between measured values of displayed parameters, advised values of the displayed parameters, values of the displayed parameters changed by the operator and simulated values of the displayed parameters.

4 . The system according to claim 3 in which the system differentiates between the different types of displayed parameters by using at least one of different display pages, separate pop-up menus, and different colors for the different types of displayed values.

5 . The system according to claim 1 in which the processing unit can be set up to issue output signals to automatically change certain operating conditions of the tractor to improve operating efficiency.

6 . The system according to claim 1 in which the processing unit recognizes when certain facilities or functions are not available on the tractor and advises the operator accordingly via the display terminal.

7 . The system according to claim 1 in which the display terminal indicates the current axle and wheel loading of the tractor.

8 . The system according to claim 1 for a tractor with a rigid unsprung axle in which the wheel load is measured by a strain gauge type sensor which measures the deflection of part of the rigid axle which supports a wheel.

9 . The system according to claim 1 for a tractor having an axle suspended by fluid pressure in which the wheel load is determined by measuring the fluid pressure which is suspending the axle and the position of the axle.

10 . The system according to claim 1 for a tractor with two or more axles which carry wheels having pneumatic tires in which sensors are provided for determining the current pull force applied to an implement or trailer pulled by the tractor, the current wheel load and the current tractor ground speed, the processing unit determining and advising the tractor operator via the display means as to the optimum weight of the tractor using a predetermined relationship between pull force and tractor weight and also the required load on each axle to achieve a predetermined optimum axle load ratio.

11 . The system according to claim 10 in which the system also advises the operator via the display terminal as to the appropriate tire pressure for the current wheel load and tractor ground speed using a look-up table.

12 . The system according to claim 11 in which the look-up table provides the lowest equal tire pressure appropriate for the current wheel load, ground speed and tire size fitted to the tractor to give minimum ground pressure to carry the load.

13 . The system according to claim 10 in which the optimum axle load ratio applied is a 40/60 ratio between the front to rear axle load.

14 . The system according to claim 10 in which the predetermined ratio of pull force to tractor weight is 0.4.

15 . The system according to claim 10 in which the processing unit calculates a real time value for the current ratio of pull force to tractor weight.

16 . The system according to claim 15 in which the real time value of the current ratio of pull force to tractor weight is displayed on the display terminal.

17 . The system according to claim 1 in which the processing unit calculates and the display terminal displays tank to hitch efficiency which is equal to the pull force applied to the implement or trailer divided by output provided by the fuel consumed.

18 . The system according to claim 10 in which pull force is measured using sensing pins which attach the lower implement attachment links to the tractor.

19 . The system according to claim 18 in which the display terminal displays the current pull force applied to the implement or trailer.

20 . The system according to claim 10 for a tractor which includes a transmission with a hydraulic circuit in which a hydraulic pump supplies pressure to a hydraulic motor, the pull force being determined by sensing the pressure in the hydraulic circuit, whereby the pressure in the hydraulic circuit is a measure of the wheel or axle torque, the wheel or axle torque divided by the dynamic wheel radius being a measure of the wheel circumference force, consisting of rolling resistance force and pull force thus giving a rough estimation of pull force.

21 . The system according to claim 10 in which the proportion of the weight of the implement or trailer which is supported by the tractor can be varied, the display terminal indicating the weight of the implement or trailer supported by the tractor to assist the operator in varying the axle load distribution towards the required figure determined by the system.

22 . The system according to claim 21 in which a rear hitch which allows the attachment point of the implement or trailer to be moved in fore, aft, downwards and upwards sense relative to the tractor to change the axle load distribution towards the required figure determined by the system.

23 . The system according to claim 21 in which the vertical load applied by the implement or trailer to the tractor is measured using pressure sensors in hydraulic cylinders driving lower implement attachment links or top link.

24 . The system according to claim 10 for a tractor provided with a weight which is moveable in a fore and aft sense relative to the tractor, the display terminal indicating the change in axle load resulting from the movement of the weight to assist the operator in varying the axle load distribution towards the required figure determined by the system.

25 . The system according to claim 1 for a tractor having driven front and rear axles and provided with a drive transmission which can vary the proportion of engine output torque which is directed to each axle, the display terminal displaying the output torque delivered to each axle.

26 . The system according to claim 25 in which the processing unit proportions the engine torque between the axles so that each wheel operates at substantially the same level of slip relative to the contacting ground.

27 . The system according to claim 26 in which the display terminal displays the wheel slip of each axle.

28 . The system according to claim 1 in which the processing unit calculates and the display terminal displays engine efficiency which is equal to the engine output performance at the crank shaft divided by output provid

Assignees

• Agco Int Gmbh

Inventors

• Pichlmaier Benno

Classifications

• G07C5/0816 Primary

  Indicating performance data, e.g. occurrence of a malfunction · CPC title

• G07C5/0808

  Diagnosing performance data (testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005) · CPC title

• B60K35/29

  Instruments characterised by the way in which information is handled, e.g. showing information on plural displays or prioritising information according to driving conditions · CPC title

• B60K35/28

  characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver · CPC title

• B60K35/60

  Instruments characterised by their location or relative disposition in or on vehicles (arrangements of lighting devices on dashboards B60Q3/10) · CPC title