Automatic idle adjustment and shutdown of vehicle

• US 7,702,450 B2
• Filed: 03/31/2008
• Issued: 04/20/2010
• Est. Priority Date: 03/11/2008
• Status: Active Grant

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Oftedal, Teryl M., Campbell, Kevin W., Pfohl, Kevin Lee
• Primary Examiner(s): Vo; Hieu T
• Application Number:
  US12/059,750
• Publication Number:
  US 20090234563A1
• Time in Patent Office: 750 Days
• Field of Search: 701/112, 701/113, 701/102, 701/29, 701/30, 701/35, 123/198.DB
• US Class Current: 701/112
• CPC Class Codes: E02F 9/2062 Control of propulsion units for control of the prime mover depending on the load in a hydraulic or pneumatic drive E02F9/2246
• CPC Class Codes: E02F 9/2246 Control of prime movers, e.g. depending on the hydraulic load of work tools
• CPC Class Codes: F02D 29/02 peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
• CPC Class Codes: F02D 31/001 Electric control of rotation speed
• CPC Class Codes: F02D 41/0205 using an auxiliary engine speed control engine speed control per se F02D31/00
• 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 41/08 for idling F02D41/06, F02D41/16 take precedence

Abstract

A vehicle is disclosed having an automatic idle adjustment system. The vehicle may also include an automatic shutdown system. A method for utilizing the automatic idle adjustment system and the shutdown system is also disclosed.

Claims

1. A work vehicle including:

a chassis;

a ground engaging mechanism configured to support and propel the chassis;

an engine coupled to the ground engaging mechanism to power the ground engaging mechanism;

a work tool supported by the chassis to move material; and

a control system having an idle function configured to operate the engine in a first idle state for a first period of time, and to operate the engine in a second idle state after the first period of time expires, the engine operating at a lower speed in the second idle state than in the first idle state.

2. The work vehicle of claim 1, wherein the idle function of the control system is configured to be disabled by a user.

3. The work vehicle of claim 1, wherein the first period of time is adjustable.

4. The work vehicle of claim 1, wherein the engine operates between approximately 900 and 950 rpm in the first idle state and between approximately 600 and 700 rpm in the second idle state.

5. The work vehicle of claim 1, wherein the speed of the engine drops by approximately 20% to 40% from the first idle state to the second idle state.

6. The work vehicle of claim 1, further including at least one of a throttle, a parking brake, a battery, and an oil pump, the control system being configured to monitor at least one of the throttle, the parking brake, the battery, the oil pump, a vehicle ground speed, and the engine to determine when the engine is operating in the first idle state.

7. The work vehicle of claim 1, wherein the control system is configured to reset the first period of time when the engine operates in an active state.

8. The work vehicle of claim 1, wherein the control system has a shutdown function configured to shutdown the engine after a second period of time after the second idle state begins.

9. A work vehicle including:

a chassis;

a ground engaging mechanism configured to support and propel the chassis;

an engine coupled to the ground engaging mechanism to power the ground engaging mechanism;

a work tool supported by the chassis to move material;

an idle timer; and

a shutdown timer, the engine operating in a first idle state, the idle timer controlling the duration of the first idle state, the engine operating in a second idle state when the idle timer expires, the engine operating at a lower speed in the second idle state than in the first idle state, the shutdown timer controlling the duration of the second idle state, and the engine shutting down when the shutdown timer expires.

10. The work vehicle of claim 9, wherein the idle timer is configured to be disabled by a user.

11. The work vehicle of claim 9, wherein a duration of the idle timer and a duration of the shutdown timer are adjustable.

12. The work vehicle of claim 9, wherein the engine operates between approximately 900 and 950 rpm in the first idle state and between approximately 600 and 700 rpm in the second idle state.

13. The work vehicle of claim 9, wherein the speed of the engine drops by approximately 20% to 40% from the first idle state to the second idle state.

14. The work vehicle of claim 9, further including at least one of a throttle, a parking brake, a battery, and an oil pump, the control system being configured to monitor at least one of the throttle, the parking brake, the battery, the oil pump, a vehicle ground speed, and the engine to determine when the engine is operating in the first idle state.

15. The work vehicle of claim 9, wherein the control system is configured to reset the idle timer and the shutdown timer when the engine operates in an active state.

16. The work vehicle of claim 9, further including an alarm system configured to communicate the impending expiration of the shutdown timer to a user.

17. A method of automatically adjusting a speed of an engine of a work vehicle, including the steps of:

providing a work vehicle having the engine and an idle timer;

automatically starting the idle timer when the engine begins to operate in a first idle state; and

automatically reducing the speed of the engine to operate in a second idle state when the idle timer expires.

18. The method of claim 17, further including the steps of:

further providing the vehicle with a shutdown timer;

automatically starting the shutdown timer when the engine begins to operate in the second idle state; and

automatically turning the engine off when the shutdown timer expires.

19. The method of claim 18, further including the step of automatically initiating an alarm to communicate the impending shutdown of the engine to a user.

20. The method of claim 17, further including the steps of:

further providing the vehicle with at least one of a throttle, a parking brake, a battery, and an oil pump; and

monitoring at least one of the throttle, the parking brake, the battery, the oil pump, a vehicle ground speed, and the engine to determine when the engine is operating in the first idle state.

21. The method of claim 17, further including the step of selecting a duration of the idle adjustment timer.

22. The method of claim 17, further including the step of resetting the idle adjustment timer when the engine begins to operate in an active state.

23. The method of claim 17, wherein the step of automatically turning the engine off involves automatically turning off power to an ignition of the vehicle.