Portable generator including proximity sensor

Patent metadata

Field	Value
Publication number	US-11220964-B2
Application number	US-201916567925-A
Country	US
Kind code	B2
Filing date	Sep 11, 2019
Priority date	Sep 12, 2018
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

A generator including an internal combustion engine having an exhaust outlet, a proximity sensor structured to detect a distance value indicative of a distance between the exhaust outlet and an object, and a controller. The controller includes a proximity circuit structured to receive the distance value from the proximity sensor and a shutdown circuit. The shutdown circuit is structured to receive the distance value from the proximity circuit, determine whether to initiate at least one of an alarm and a shutdown of the generator based on the distance value and a predetermined distance value minimum, and initiate at least one of the alarm and the shutdown of the generator based on determining that the distance value is less than the predetermined distance value minimum.

First claim

What is claimed is:

1. A generator comprising:
an internal combustion engine having an exhaust outlet; and
a proximity sensor structured to detect a distance value indicative of a distance between the exhaust outlet and an object; and
a controller comprising:
a proximity circuit structured to receive the distance value from the proximity sensor; and
a shutdown circuit structured to:
receive the distance value from the proximity circuit;
determine whether to initiate at least one of an alarm and a shutdown of the generator based on the distance value and a predetermined distance value minimum; and
initiate at least one of the alarm and the shutdown of the generator based on determining that the distance value is less than the predetermined distance value minimum;

wherein the distance value comprises a first distance value and the shutdown circuit is structured to initiate the alarm based on determining that the first distance value is less than the predetermined distance value minimum;
wherein the shutdown circuit is further structured to receive a second distance value from the proximity circuit after activating the alarm and initiate the shutdown of the generator based on determining that the second distance value is less than the predetermined distance value minimum.

2. The generator of claim 1 ,
wherein the shutdown circuit is further structured to deactivate the alarm based on determining that the second distance value is more than the predetermined distance value minimum.

3. The generator of claim 1 , further comprising a carbon monoxide (CO) sensor, wherein the shutdown circuit is further structured to receive a detected level of CO from the CO sensor, determine whether to initiate at least one of the alarm and the shutdown of the generator based on the detected level of CO and a predetermined CO level threshold, and initiate at least one of the alarm and the shutdown of the generator based on determining that the detected level of CO is more than the predetermined CO level threshold.

4. The generator of claim 3 , wherein the shutdown circuit is further structured to:
determine whether to initiate the shutdown of the generator based on the detected level of CO, the second distance value, the predetermined distance value minimum, and the predetermined CO level threshold; and
initiate the shutdown of the generator based on determining that the detected level of CO is more than the predetermined CO level threshold and the second distance value is less than the predetermined distance value minimum.

5. The generator of claim 1 , wherein the controller further comprises an alert circuit structured to receive an indication from the shutdown circuit to trigger an alert on the generator; and trigger the alert on the generator.

6. The generator of claim 1 , wherein the proximity sensor comprises a first proximity sensor and the generator further comprises a second proximity sensor;
wherein the second proximity sensor is structured to determine a heat signature value of the object;
wherein the shutdown circuit is structured to initiate at least one of the alarm and the shutdown of the generator based on the heat signature value and at least one of the first and second distance values.

7. The generator of claim 6 , wherein the second proximity sensor includes an infrared sensor.

8. The generator of claim 1 , wherein the proximity sensor comprises a first proximity sensor, and the generator further comprises a second proximity sensor structured to determine a third distance value measured at an angle relative to the first distance value;
wherein the shutdown circuit is structured to initiate at least one of the alarm and the shutdown of the generator based on determining that the first distance value and the third distance value are less than the predetermined distance value minimum.

9. The generator of claim 1 , wherein the proximity sensor includes at least one of an infrared sensor and an ultrasonic sensor.

10. The generator of claim 1 , wherein the proximity sensor is further structured to determine the second distance value measured a predetermined period of time after the first distance value, wherein the controller is further structured to:
determine a transient value of the object based on a difference between the first distance value and the second distance value over the predetermined period of time;
determine that the transient value is greater than a transient value threshold; and
disregard the object from a shutdown determination or an alert determination.

11. A shutdown controller unit comprising:
a proximity sensor structured to detect a distance value indicative of a distance between the proximity sensor and an object; and
a controller comprising:
a proximity circuit structured to receive the distance value from the proximity sensor; and
a shutdown circuit structured to:
receive the distance value from the proximity circuit;
determine whether to initiate at least one of an alarm and a shutdown of a generator based on the distance value and a predetermined distance value minimum; and
initiate at least one of the alarm and the shutdown of the generator based on determining that the distance value is less than the predetermined distance value minimum;

wherein the distance value comprises a first distance value and the shutdown circuit is structured to initiate the alarm based on determining that the first distance value is less than the predetermined distance value minimum;
wherein the shutdown circuit is further structured to receive a second distance value from the proximity circuit after activating the alarm and initiate the shutdown of the generator based on determining that the second distance value is less than the predetermined distance value minimum.

12. The shutdown controller unit of claim 11 ,
wherein the shutdown circuit is further structured to deactivate the alarm based on determining that the second distance value is more than the predetermined distance value minimum.

13. The shutdown controller unit of claim 11 , further comprising a carbon monoxide (CO) sensor, wherein the shutdown circuit is further structured to receive a detected level of CO from the CO sensor, determine whether to initiate at least one of the alarm and the shutdown of the generator based on the detected level of CO and a predetermined CO level threshold, and initiate at least one of the alarm and the shutdown of the generator based on determining that the detected level of CO is more than the predetermined CO level threshold.

14. The shutdown controller unit of claim 13 , wherein the shutdown circuit is further structured to:
determine whether to initiate the shutdown of the generator based on the detected level of CO, the second distance value, the predetermined distance value minimum, and the predetermined CO level threshold; and
initiate the shutdown of the generator based on determining that the detected level of CO is more than the predetermined CO level threshold and the second distance value is less than the predetermined distance value minimum.

15. The shutdown controller unit of claim 11 , wherein the controller further comprises an alert circuit structured to receive an indication from the shutdown circuit to trigger an alert on the generator; and trigger the alert on the generator.

16. The shutdown controller unit of claim 11 , wherein the proximity sensor comprises a first proximity sensor and the generator further comprises a second proximity sensor;
wherein the second proximity sensor is structured to determine a heat signature value of the obje

Assignees

• Briggs & Stratton Llc

Inventors

• Willer Mark
• Janscha Ryan
• Nigh Brandon
• Baeten Austin

Classifications

• F02B63/047

  Movable engine-generator combinations on wheels · CPC title

• H02P9/08

  Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation · CPC title

• F02D29/06 Primary

  peculiar to engines driving electric generators · CPC title

• F02D41/22

  Safety or indicating devices for abnormal conditions {(in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809)} · CPC title

• G01N33/004 Primary

  CO or CO2 · CPC title