Electronic fuel injection system and method for engines

Patent metadata

Field	Value
Publication number	US-11614047-B2
Application number	US-202117456671-A
Country	US
Kind code	B2
Filing date	Nov 29, 2021
Priority date	Feb 25, 2016
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

A system includes an electronic fuel injection system of an engine, the electronic fuel injection system including an electronic governor control unit for controlling various functions of the engine.

First claim

We claim:

1. A method for automatically learning throttle position, comprising:
monitoring a throttle position sensor voltage signal sent by a throttle position sensor to an electronic governor control unit, the throttle position sensor voltage signal representing a position of a throttle;
measuring a run time of an engine via a timer;
filtering the throttle position sensor voltage signal based on a value of the timer; and
saving a lowest measured value of the throttle position sensor voltage signal and assigning the lowest measured value to a zero percent throttle.

2. The method of claim 1 , further comprising monitoring the throttle position sensor voltage signal continuously.

3. The method of claim 1 , further comprising monitoring the throttle position sensor voltage signal periodically.

4. The method of claim 1 , further comprising monitoring the throttle position sensor voltage signal every calculation loop.

5. The method of claim 1 , wherein the step of measuring further comprises monitoring an age of the engine with the timer; and the step of filtering further comprises increasing a filter attenuation based on the age of the engine.

6. The method of claim 1 , wherein the step of measuring further comprises monitoring an age of the engine and wherein the step of filtering comprises monitoring the throttle position sensor voltage signal over a longer period with increasing age.

7. The method of claim 1 , further comprising resetting the timer when the throttle position sensor is replaced or when a throttle position is adjusted during maintenance.

8. The method of claim 1 , wherein when a system reset is done on the engine, the lowest measured value is reset to a reference value stored in a calibration layer of the electronic governor control unit.

9. The method of claim 1 , wherein the step of filtering comprises removing unwanted voltage spikes with a digital or analog filter.

10. A method for automatically learning throttle position, comprising:
monitoring a throttle position sensor voltage signal, the throttle position sensor voltage signal representing a position of a throttle;
measuring a run time of an engine via a timer;
filtering the throttle position sensor voltage signal based on a value of the timer; and
saving a lowest measured value of the throttle position sensor voltage signal and assigning the lowest measured value to a zero percent throttle.

11. The method of claim 10 , further comprising monitoring the throttle position sensor voltage signal continuously.

12. The method of claim 10 , further comprising monitoring the throttle position sensor voltage signal periodically.

13. The method of claim 10 , further comprising monitoring the throttle position sensor voltage signal every calculation loop.

14. The method of claim 10 , wherein the step of measuring further comprises monitoring an age of an engine with the timer; and
The step of filtering further comprises increasing a filter attenuation based on the age of the engine.

15. The method of claim 10 , wherein the step of measuring further comprises monitoring an age of the engine and wherein the step of filtering comprises monitoring the throttle position sensor voltage signal over a longer period with increasing age.

16. The method of claim 10 , further comprising resetting the timer when a throttle position sensor is replaced or when a throttle position is adjusted during maintenance.

17. The method of claim 10 , wherein when a system reset is done on the engine, the lowest measured value is reset to a reference value stored in a calibration layer of an electronic governor control unit.

18. The method of claim 10 , wherein the step of filtering comprises removing unwanted voltage spikes with a digital or analog filter.

19. A method for automatically learning throttle position, comprising:
monitoring an age of an engine with a timer;
monitoring a throttle position sensor voltage signal sent by a throttle position sensor to an electronic governor control unit, the throttle position sensor voltage signal representing a position of a throttle;
removing unwanted voltage spikes with a digital or analog filter, the digital or analog filter having an attenuation which increases with increasing age of the engine; and
saving a lowest measured value of the throttle position sensor voltage signal and assigning the lowest measured value to a zero percent throttle.

20. The method of claim 19 , wherein the step of removing further comprises monitoring the throttle position sensor voltage signal over a longer period with increasing age.

Assignees

• Kohler Co

Inventors

• Radue Martin L
• Kleczewski Michael

Classifications

• F02M35/09

  Clogging indicators {; Diagnosis or testing of air cleaners (sensors therefore F02M35/10373)} · CPC title

• F02D2250/18

  Control of the engine output torque · CPC title

• F02D2250/16

  End position calibration, i.e. calculation or measurement of actuator end positions, e.g. for throttle or its driving actuator · CPC title

• F02D2009/0235

  Throttle control functions · CPC title

• F01M2011/1473

  by considering temperature · CPC title