Work vehicle

Patent metadata

Field	Value
Publication number	US-12055089-B2
Application number	US-202318201780-A
Country	US
Kind code	B2
Filing date	May 25, 2023
Priority date	Jun 6, 2022
Publication date	Aug 6, 2024
Grant date	Aug 6, 2024

Abstract

A work vehicle includes a diesel engine, a heater to heat a gas to be supplied to a combustion chamber of the diesel engine, and a controller to execute an afterglow routine to cause the heater to operate. The controller is configured or programmed to execute the afterglow routine in response to the diesel engine being started, an elapse of a predetermined stop time since an end of a previous execution of the afterglow routine, and the work vehicle being in a warming-up state.

First claim

What is claimed is:

1. A work vehicle comprising:
a diesel engine;
a heater to heat a gas to be supplied to a combustion chamber of the diesel engine;
a controller to execute an afterglow routine to cause the heater to operate; and
a work device; wherein
the controller is configured or programmed to execute the afterglow routine in response to (i) the diesel engine being started, (ii) an elapse of a predetermined stop time since an end of previous execution of the afterglow routine, and (iii) the work vehicle being in a warming-up state; and
the controller is configured or programmed to determine that the work vehicle is in the warming-up state in response to the work device being stopped.

2. The work vehicle according to claim 1 , further comprising:
a travel device; wherein
the controller is configured or programmed to determine that the work vehicle is in the warming-up state in response to (i) the travel device being stopped and (ii) the work device being stopped.

3. The work vehicle according to claim 1 , wherein the controller is configured or programmed to count a number of executions of the afterglow routine, and does not execute the afterglow routine after the number of executions has reached a predetermined maximum number of executions.

4. The work vehicle according to claim 3 , further comprising:
a starting switch; wherein
the controller is configured or programmed to reset the number of executions to zero in response to the starting switch being turned off, and in response to the diesel engine being stopped without operation of the starting switch.

5. The work vehicle according to claim 1 , wherein
the afterglow routine includes a predetermined number of repetitions of (i) a first process of activating the heater, and (ii) a second process of setting the heater to a lower temperature than in the first process; and
the first process is executed for a longer duration in a first execution than in a subsequent execution.

6. A work vehicle comprising:
a diesel engine;
a heater to heat a gas to be supplied to a combustion chamber of the diesel engine;
a controller to execute an afterglow routine to cause the heater to operate;
a travel device;
a work device; and
a parking brake; wherein
the controller is configured or programmed to execute the afterglow routine in response to (i) the diesel engine being started, (ii) an elapse of a predetermined stop time since an end of previous execution of the afterglow routine, and (iii) the work vehicle being in a warming-up state; and
the controller is configured or programmed to determine that the work vehicle is in the warming-up state in response to (i) the travel device being stopped, (ii) the work device being stopped, and (iii) the parking brake being activated.

7. A work vehicle comprising:
a diesel engine;
a heater to heat a gas to be supplied to a combustion chamber of the diesel engine;
a controller to execute an afterglow routine to cause the heater to operate; and
a work device; wherein
the controller is configured or programmed to execute the afterglow routine in response to (i) the diesel engine being started, (ii) an elapse of a predetermined stop time since an end of previous execution of the afterglow routine, and (iii) the work vehicle being in a warming-up state;
the controller is configured or programmed to execute a premature termination of the afterglow routine in response to a predetermined end condition being satisfied; and
the end condition includes an activation of the work device.

8. The work vehicle according to claim 7 , wherein the work device does not execute the premature termination before a time since the diesel engine was started exceeds a predetermined elapsed time.

Assignees

• Kubota Kk

Inventors

• Nakano Shota
• Takahashi Keiji
• Gono Tsuyoshi
• Ono Keita
• Tottori Norita
• Okamoto Naoya
• Tanaka Ryosuke

Classifications

• F02P19/022

  using intermittent current supply · CPC title

• F02M31/13

  Combustion air · CPC title

• F02N19/06

  by heating of combustion-air by flame generating means, e.g. flame glow-plugs · CPC title

• F02B3/06 Primary

  with compression ignition (compression ignition engines using air or gas for blowing fuel into compressed air in cylinder F02B13/02) · CPC title