Systems and methods for an engine

Patent metadata

Field	Value
Publication number	US-11536216-B2
Application number	US-202117446823-A
Country	US
Kind code	B2
Filing date	Sep 2, 2021
Priority date	Oct 13, 2020
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

Various systems and methods are provided for adjusting operating parameters of an internal combustion engine. In one example, a system may include adjusting an amount of advance of a fuel injection timing of a plurality of fuel injectors of an internal combustion engine relative to top dead center (TDC) responsive to engine output demand, where, as the engine output demand increases, the amount of advance first decreases and then increases. In this way, an amount of vehicle emissions may be decreased while an amount of fuel consumption is decreased.

First claim

The invention claimed is:

1. A method, comprising:
adjusting a fuel injection timing of a plurality of fuel injectors of an internal combustion engine relative to top dead center (TDC) responsive to engine output demand proportional to an engine notch, where, as the engine output demand increases, an amount of retard increases during a first notch range and then an amount of advance increases during a second notch range greater than the first.

2. The method of claim 1 , further comprising:
adjusting an upper limit for increasing the amount of advance the fuel injection timing of the plurality of fuel injectors relative to TDC responsive to the engine output demand, where, as the engine output demand increases, the upper limit for increasing the amount of advance of the plurality of fuel injectors relative to TDC decreases; and
adjusting a lower limit for decreasing the amount of advance of the fuel injection timing of the plurality of fuel injectors relative to TDC responsive to the engine output demand, where, as the engine output demand increases, the lower limit for decreasing the amount of advance of the fuel injection timing of the plurality of fuel injectors relative to TDC increases.

3. The method of claim 1 , further comprising:
adjusting a number of engine revolutions per minute (RPM) responsive to the engine output demand, where, as the engine output demand increases, the number of engine RPM increases, wherein the engine combusts diesel fuel.

4. The method of claim 1 , further comprising:
adjusting a rail pressure of a common rail fuel injection system of the internal combustion engine responsive to the engine output demand, where, as the engine output demand increases, the rail pressure of the common rail fuel injection system increases.

5. The method of claim 1 , further comprising:
responsive to transitioning from a first engine output demand to a second engine output demand, the second engine output demand higher than the first engine output demand, increasing both of a rail pressure of a common rail fuel injection system and an engine speed reference.

6. The method of claim 1 , further comprising:
responsive to a turbocharger inlet temperature of a turbocharger of the internal combustion engine above 100° F., increasing an engine speed; and
decreasing the amount of advance of the fuel injection timing of the plurality of fuel injectors relative to TDC as the turbocharger inlet temperature increases.

7. The method of claim 1 , wherein the engine output demand is determined based on a state of a user input for selecting a desired engine output demand for an engine governor of the internal combustion engine.

8. An engine system, comprising:
a plurality of cylinders;
an engine governor with a plurality of engine output demands;
a common rail fuel injection system, the common rail fuel injection system including a plurality of fuel injectors coupled to the plurality of cylinders;
a turbocharger including a nozzle ring on a turbine of the turbocharger;
a camshaft configured for an advanced intake valve closing time;
a controller including executable instructions stored in non-transitory memory that, when executed, cause the controller to:
responsive to an engine output demand increasing from a first level to a second level higher than the first level through a first engine notch range, increase an amount of retard of a fuel injection timing of the plurality of fuel injectors relative to top dead center (TDC); and
responsive to the engine output demand further increasing from the second level to a third level higher than the second level through a second engine notch range comprising higher engine notches than the first engine notch range, increase an amount of advance of the fuel injection timing of the plurality of fuel injectors relative to TDC.

9. The engine system of claim 8 , wherein the controller includes further executable instructions stored in the non-transitory memory that, when executed, cause the controller to:
decrease an upper limit for increasing the amount of advance of the fuel injection timing of the plurality of fuel injectors relative to TDC as the engine output demand increases from the second level to the third level; and
increase a lower limit for decreasing the amount of advance of the fuel injection timing of the plurality of fuel injectors relative to TDC as the engine output demand increases from the second level to the third level.

10. The engine system of claim 8 , wherein the controller includes further executable instructions stored in the non-transitory memory that, when executed, cause the controller to:
responsive to the engine output demand increasing from the first level to the second level, increase a number of engine revolutions per minute (RPM).

11. The engine system of claim 8 , wherein the controller includes further executable instructions stored in the non-transitory memory that, when executed, cause the controller to:
responsive to the engine output demand increasing from the first level to the second level, increase a rail pressure of the common rail fuel injection system.

12. The engine system of claim 11 , wherein the controller includes further executable instructions stored in the non-transitory memory that, when executed, cause the controller to:
responsive to an engine RPM at or below 580 RPM, limit the rail pressure of the common rail fuel injection system to be at or below 1000 bar; and
responsive to the engine RPM above 580 RPM, limit the rail pressure of the common rail fuel injection system to be at or below 1600 bar.

13. The engine system of claim 8 , wherein the controller includes further executable instructions stored in the non-transitory memory that, when executed, cause the controller to:
responsive to a transient condition during while transitioning from a first engine output demand to a second engine output demand, the second engine output demand higher than the first engine output demand, increase both of a rail pressure of the common rail fuel injection system and an engine speed reference.

14. The engine system of claim 8 , wherein the controller includes further instructions stored in the non-transitory memory that, when executed, cause the controller to:
responsive to barometric pressure increasing, decrease an engine speed of the engine system;
responsive to the barometric pressure increasing and the engine output demand at a mid-range engine output demand, decrease the amount of advance of the fuel injection timing relative to TDC; and
responsive to the barometric pressure increasing and the engine output demand at a high engine output demand, advance the fuel injection timing relative to TDC.

15. The engine system of claim 8 , wherein the controller includes further instructions stored in the non-transitory memory that, when executed, cause the controller to:
responsive to a turbocharger inlet temperature above 100° F., increase an engine speed; and
decrease the amount of advance of the fuel injection timing relative to TDC as the turbocharger inlet temperature increases.

16. A system, comprising:
an engine including a plurality of cylinders;
an engine governor with a plurality of engine output demand;
a common rail fuel injection system, the common rail fuel injection system including a plurality of fuel injectors coupled to the plurality of cylinders;
a turbocharger including a nozzle ring;
a camshaft configured for an advanced intake valve closing time;
a controller including executable instructions stored in non-transitory memory that, when executed, cause the

Assignees

• Transp Ip Holdings Llc

Inventors

• Hart Matthew
• Lavertu Thomas
• Felton Adam
• Vaidya Preeti
• Loringer Daniel
• Gupta Venu
• Brigden Jesse
• Brumberg Justin
• Gray Taylor
• Gallagher Shawn

Classifications

• B61C5/00

  Locomotives or motor railcars with IC engines or gas turbines (characterised by power transmission B61C9/00; engines F02) · CPC title

• F02D41/3836 Primary

  Controlling the fuel pressure · CPC title

• F02D2200/60

  said parameters being related to the driver demands or status · CPC title

• Y02T30/00

  Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance · CPC title

• F02D31/007

  controlling fuel supply · CPC title