TRACTOR WITH TWO ENGINE SETTINGS

• US 20080047245A1
• Filed: 08/03/2007
• Published: 02/28/2008
• Est. Priority Date: 08/24/2006
• Status: Active Grant

• Current Assignee: Macdon Industries Ltd (Linamar Corporation)
• Original Assignee: Macdon Industries Ltd (Linamar Corporation)
• Inventors: Gabriel, Brent, MacGregor, Don, Dunn, James Thomas, Bergman, Leonard
• Granted Patent: US 7,849,952 B2
• Time in Patent Office: Days
• US Class Current: 56/10.8
• CPC Class Codes: A01D 69/00 Driving mechanisms or parts thereof for harvesters or mowers driving mechanisms for the cutters of mowers or harvesters A01D34/00
• CPC Class Codes: A01D 69/03 fluid
• CPC Class Codes: B60K 6/12 by means of a chargeable fluidic accumulator
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/103 of fluid type
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/15 Control strategies specially adapted for achieving a particular effect
• CPC Class Codes: B60W 2300/158 Harvesters
• CPC Class Codes: B60W 2710/0644 Engine speed
• CPC Class Codes: B60W 2710/0677 Engine power
• CPC Class Codes: B60W 30/18009 related to particular drive situations
• CPC Class Codes: B60Y 2200/222 Harvesters
• CPC Class Codes: F02D 29/02 peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
• CPC Class Codes: F02D 31/007 controlling fuel supply
• CPC Class Codes: F02D 41/021 Introducing corrections for particular conditions exterior to the engine conjoint control of vehicle sub-units for propelling the vehicle B60W30/18
• CPC Class Codes: F02D 41/406 Electrically controlling a diesel injection pump F02D41/401 takes precedence
• CPC Class Codes: Y02P 60/14 Measures for saving energy, e.g. in green houses
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A tractor has hydraulically driven wheels at a cab end and castor wheels at an engine end. It can be driven cab forward in a working mode with a header on the forward end. It is rotated to engine forward in the transport position for more stable higher speed travel. The driver'"'"'s console is rotated in the cab with the steering and speed control elements moved with the seat for the driver to face forwards and its position is detected by switches. In the engine forward position for transportation, the control system detects the seat position and operates the controls for higher speed drive and to prevent operation of the header. The engine has a series of ratings which can be selected depending upon whether the header motor is engaged so that a highest engine speed is used only when the header is disengaged and the lower speed is used for higher fuel efficiency when the header is operating.

Claims

1. A crop harvesting machine comprising:

a tractor frame;

a crop harvesting header mounted on the tractor frame for movement across the ground to harvest a standing crop;

the header having at least one header hydraulic motor for driving components of the header in the harvesting action;

the tractor having a first driven ground wheel driven by a first hydraulic motor and a second driven ground wheel driven by a second hydraulic motor;

a header control actuable by the driver to provide a control signal indicative of a requirement for supply of driving fluid to the at least one header hydraulic motor to drive the components thereof;

a first pump for generating a flow in a first pressurized hydraulic fluid for driving the first and second hydraulic motors;

a second pump for generating a flow in a second pressurized hydraulic fluid for driving the at least one header hydraulic motor;

an internal combustion engine on the tractor frame for driving the first and second pumps;

the second pump having a flow rate control system for supplying a constant rate of the second pressurized hydraulic fluid for driving the at least one header hydraulic motor at a constant rate regardless of changes of rpm of the engine;

the engine having a fuel injection pump;

an engine control system for controlling the fuel injection pump so as to control an amount of fuel injected and a timing of the injection;

a driver control system including a throttle control actuable by the driver to move between a minimum engine speed position and a maximum engine speed position to provide a control signal to the engine control system;

the engine control system being arranged to control fuel supply and injection timing so as to maintain engine power output at or below an allowable power output curve;

the engine control system being arranged to provide at least two selectable settings for engine rpm where a first one of the settings is at a higher engine rpm and a second one of the settings is at a reduced engine rpm;

the first of the settings being selected when the header components are not driven;

the second of the settings being selected when the header components are driven;

the first setting being arranged such that, when selected, movement of the throttle control to the maximum engine speed position causes the engine control system to drive the engine at the higher engine rpm; and

the second setting being arranged such that, when selected, movement of the throttle control to the maximum engine speed position causes the engine control system to drive the engine at the reduced engine rpm.

2. The machine according to claim 1 wherein the engine control system is arranged such that the allowable power output curve provides a power output at the higher engine rpm which is less than a power output at the reduced engine rpm.

3. The machine according to claim 1 wherein the higher engine rpm is a maximum allowable engine rpm.

4. The machine according to claim 1 wherein the second of the settings is selected in response to actuation of the header control by the driver to drive the header components and the first of the settings is selected in response to actuation of the header control by the driver to halt drive to the header components.

5. The machine according to claim 1 wherein the first pump is arranged such that a rate of the first pressurized hydraulic fluid varies as the rpm of the engine changes.

6. The machine according to claim 1 wherein the first pump is arranged at a maximum stroke for maximum flow rate such that a rate of the first pressurized hydraulic fluid varies as the rpm of the engine changes.

7. The machine according to claim 1 wherein the first and second settings are selected by a manually operable switch operable by the driver.

8. The machine according to claim 1 wherein the engine control system is arranged such that the allowable power output curve provides a fuel usage of the engine at the second setting which is less than the fuel usage at the first setting.

9. The machine according to claim 1 wherein there is provided a cab mounted on the tractor frame, the two driven wheels being mounted at a driven end of the tractor frame and there being provided two non-driven castor wheels of the tractor mounted at a second end of the tractor, the cab being mounted on the frame at the driven end, the driven end having mounting assemblies for supporting the header at a position in front of the driven end and in front of the cab when the driven end is forwards, the engine being located between the cab and the second end of the frame, there being provided an operator'"'"'s seat on which the operator can sit which is rotatable in the cab from a cab forward position in which the operator'"'"'s seat faces the driven end of the frame to an engine forward position in which the operator'"'"'s seat faces the second end with the engine in front of the operator'"'"'s seat, wherein the first and second settings are selected by a switch operable by rotation of the seat.

10. The machine according to claim 9 wherein the operation the speed control is changed such that the driven wheels can rotate at higher speed to drive the tractor at higher ground speed when the operator'"'"'s seat is in the engine forward position.

11. The machine according to claim 1 wherein the first and second motors have a higher drive range which can be accessed only when the engine control system is in the first setting.

12. The machine according to claim 1 wherein the first and second motors have a low speed range in the second setting and the low speed range and a high speed range in first setting.

13. The machine according to claim 1 wherein the first and second motors have one low speed range and one intermediate speed range in second setting and have the low speed range, and a high speed range in the first setting.