IP Library Granted Patent US 12686246
Granted Patent B2
US 12686246 · App. 18/050,165 · Granted Jul 21, 2026

System and method for regulating environment within operator cabin of machine

Inventors: Elakhya Nedumaran (Chennai, IN); Liang Fan (Wuxi, CN); Jiawei Sheng (Wuxi, CN); Tao Meng (Wuxi, CN); Bahman Gozloo (Peoria, IL); Dennis Lee Kroeger (Washington, IL); Weixiu Wang (Wuxi, CN); Yosabath Samraj M (Sholinganallur, IN); Thanjavur Nagarajan Sriraam (Thanjavur, IN)
Assignee: Caterpillar Inc.
B60H1/008B60H1/00378B60H1/00814B60H3/0608
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Quick Facts
Patent No.
US 12686246
App. No.
18/050,165
Granted
Jul 21, 2026
Kind
B2
Abstract

A system for regulating an environment within an operator cabin of a machine via a heating, ventilation, and air conditioning (HVAC) system includes a first sensor that generates a first signal of an amount of air pressure within the operator cabin, a second sensor that generates a second signal of an amount of carbon dioxide within the operator cabin, an air filtration element to direct pre-cleaned air into the operator cabin, an inlet valve disposed between the air filtration element and the HVAC system for controlling a flowrate of the pre-cleaned air to the HVAC system, and a controller. The controller actuates dynamic auto-control of the inlet valve to direct an optimally varying flowrate of the pre-cleaned air from the air filtration element to the HVAC system via the inlet valve to maximize a service life of the air filtration element.

Claims (54)

1 . A system for regulating an environment within an operator cabin of a machine via a heating, ventilation, and air conditioning (HVAC) system of the operator cabin, the system comprising:

a first sensor configured to generate a first signal indicative of an amount of air pressure within the operator cabin;

a second sensor configured to generate a second signal indicative of an amount of carbon dioxide (CO 2 ) within the operator cabin;

an air filtration element configured to direct pre-cleaned air into the operator cabin;

an inlet valve disposed between the air filtration element and the HVAC system, wherein the inlet valve is configured to control a flowrate of the pre-cleaned air to the HVAC system; and

a controller coupled in communication with the first sensor, the second sensor, and the inlet valve, wherein the controller is configured to:

receive the first signal indicative of the amount of air pressure within the operator cabin from the first sensor;

receive the second signal indicative of the amount of CO 2 within the operator cabin from the second sensor;

compare each of the amount of air pressure within the operator cabin with a predefined allowable pressure range upon receipt of the first signal and the amount of CO 2 within the operator cabin with a predefined maximum allowable value upon receipt of the second signal;

determine if the environment within the operator cabin requires regulation, from the comparisons, if at least one of:

the amount of air pressure within the operator cabin is outside of the predefined allowable pressure range, and

the amount of CO 2 within the operator cabin is greater than the predefined maximum allowable value;

actuate dynamic auto-control of the inlet valve to direct a varying flowrate of the pre-cleaned air from the air filtration element to the HVAC system via the inlet valve to maximize a service life of the air filtration element;

determine, based on the amount of air pressure within the operator cabin and the amount of CO 2 within the operator cabin, an anomaly with one or more sealing elements associated with the operator cabin; and

generate an alert notification in response to the determined anomaly.

2 . The system of claim 1 , wherein the alert notification is a first alert notification, and wherein the controller is configured to generate a second alert notification if at least one of:

the amount of air pressure within the operator cabin is outside of the predefined allowable pressure range; and

the amount of CO 2 within the operator cabin is greater than the predefined maximum allowable value.

3 . The system of claim 2 further comprising an alarm present within the operator cabin and coupled in communication with the controller, wherein the controller is configured to activate the alarm based on a generation of the second alert notification.

4 . The system of claim 2 , wherein the controller is configured to transmit each of the second alert notification, the amount of air pressure within the operator cabin, and the amount of CO 2 within the operator cabin to a remotely located back-office computing system.

5 . The system of claim 2 , wherein the controller is configured to transmit each of the second alert notification, the amount of air pressure within the operator cabin, and the amount of CO 2 within the operator cabin to one or more personnel remotely located relative to the machine.

6 . The system of claim 2 , wherein the amount of air pressure within the operator cabin and the amount of CO 2 within the operator cabin are further used to determine at least one of:

a remaining useful life of the air filtration element;

an efficiency of the air filtration element; and

the efficiency of the HVAC system.

7 . The system of claim 2 further comprising a display device present within the operator cabin and coupled in communication with the controller, the display device configured to display the amount of air pressure within the operator cabin and the amount of CO 2 within the operator cabin thereon.

8 . The system of claim 1 further comprising an input device coupled in communication with the controller, the input device configured to facilitate receipt of an input from an operator of the machine for manually overriding the dynamic auto-control of the inlet valve by the controller by facilitating a selection of a preset constant flowrate of the pre-cleaned air corresponding to a desired air pressure range for the operator cabin from a plurality of discrete air pressure ranges.

9 . The system of claim 8 , wherein the input to facilitate the selection of the preset constant flowrate corresponding to the desired air pressure range is based on operator preference.

10 . The system of claim 1 , wherein the air filtration element is a high efficiency particulate air (HEPA) filter.

11 . A machine comprising:

an operator cabin;

a heating, ventilation, and air conditioning (HVAC) system associated with the operator cabin; and

the system of claim 1 for regulating the environment within the operator cabin via the HVAC system.

12 . A method for regulating an environment within an operator cabin of a machine via a heating, ventilation, and air conditioning (HVAC) system of the operator cabin, the method comprising:

receiving, by a controller, a first signal indicative of an amount of air pressure within the operator cabin;

receiving, by the controller, a second signal indicative of an amount of carbon dioxide (CO 2 ) within the operator cabin;

comparing, by the controller, each of the amount of air pressure within the operator cabin with a predefined allowable pressure range upon receipt of the first signal and the amount of CO 2 within the operator cabin with a predefined maximum allowable value upon receipt of the second signal;

determining, by the controller, if the environment within the operator cabin requires regulation, from the comparisons, if at least one of the amount of air pressure within the operator cabin is outside of the predefined allowable pressure range and the amount of CO 2 within the operator cabin is greater than the predefined maximum allowable value; and

actuating, by the controller, dynamic auto-control of an inlet valve to direct a varying flowrate of pre-cleaned air from an air filtration element to the HVAC system via the inlet valve to maximize a service life of the air filtration element, wherein the air filtration element is configured to direct the pre-cleaned air into the operator cabin, and wherein the inlet valve is disposed between the air filtration element and the HVAC system;

determining, by the controller and based on the amount of air pressure within the operator cabin and the amount of CO 2 within the operator cabin, an anomaly with one or more sealing elements associated with the operator cabin; and

generating, by the controller, an alert notification in response to the determined anomaly.

13 . The method of claim 12 , wherein the alert notification is a first alert notification, and the method of claim 12 further comprising generating, by the controller, a second alert notification if at least one of:

the amount of air pressure within the operator cabin is outside of the predefined allowable pressure range; and

the amount of CO 2 within the operator cabin is greater than the predefined maximum allowable value.

14 . The method of claim 13 further comprising activating, by the controller, an alarm based on a generation of the second alert notification, wherein the alarm is present within the operator cabin and coupled in communication with the controller.

15 . The method of claim 13 further comprising transmitting, by the controller, each of the second alert notification, the amount of air pressure within the operator cabin, and the amount of CO 2 within the operator cabin to at least one of a remotely located back-office computing system and one or more personnel remotely located relative to the machine.

16 . The method of claim 13 , wherein the amount of air pressure within the operator cabin and the amount of CO 2 within the operator cabin are further used to determine at least one of:

a remaining useful life of the air filtration element;

an efficiency of the air filtration element; and

the efficiency of the HVAC system.

17 . The method of claim 12 further comprising displaying the amount of air pressure within the operator cabin and the amount of CO 2 within the operator cabin on a display device, wherein the display device is present within the operator cabin and coupled in communication with the controller.

18 . The method of claim 12 further comprising receiving, by the controller, an input from an operator of the machine for manually overriding the dynamic auto-control of the inlet valve by the controller by facilitating a selection of a preset constant flowrate of the pre-cleaned air corresponding to a desired air pressure range for the operator cabin from a plurality of discrete air pressure ranges, wherein the input is received via an input device present within the operator cabin and coupled in communication with the controller.

19 . The method of claim 18 , wherein the input to facilitate the selection of the preset constant flowrate corresponding to the desired air pressure range is based on operator preference.

20 . The method of claim 12 , wherein the air filtration element is a high efficiency particulate air (HEPA) filter.