# US 11,028,804 B2 · Exhaust gas recirculation element cleaner and method of use

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- Number: US 11,028,804 B2
- Document ID: US11028804B2
- Status: Granted
- Kind: B2
- Application number: 16/279,808
- Filed: 2019-02-19
- Published: 2019-08-22
- Granted: 2021-06-08
- Earliest claimed: 2018-02-20
- Assignees: Fleet Emission Solutions Inc.
- Applicants: Fleet Emission Solutions, Inc.
- Inventors: Scott Storey
- Web page: https://patentgrep.com/patent/US11028804B2

## CPC

- F02M 26/35: with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
- B08B 9/00: Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B 9/0321: {using pressurised, pulsating or purging fluid (E04F17/126 takes precedence)}
- B08B 13/00: Accessories or details of general applicability for machines or apparatus for cleaning
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL

## Abstract

The present invention provides an EGR cleaning station and method of use for efficiently cleaning EGR from soot and debris. The gas recirculation cleaning station is primarily comprised of: a cleaning tank; a water tank; a heating system; a pump; an inlet hose; an outlet hose; and, exterior housing. The EGR cleaning station isolates the EGR while mounted onto the internal combustion engine. The method of cleaning the EGR through the use EGR cleaning station in a stepwise manner, first cleaning the EGR by circulating the cleaning solution, then rinsing the EGR with circulating water. The cleaning of the EGR occurs without the need to remove the EGR from the internal combustion engine.

## Claims

### Claim 1

A method of removing engine deposits and soot from an exhaust gas recirculation (EGR) element of an internal combustion engine using an EGR cleaning station comprising of steps: Increasing from an ambient temperature, the temperature of a cleaning solution and water housed within the EGR cleaning station; increasing from an ambient temperature, the temperature of the EGR; setting sealing adaptors of the EGR cleaning station within terminal ends of the EGR; forming a complete loop between the EGR cleaning station and the EGR; forming
a fluid connection between the EGR and the cleaning solution within the EGR cleaning station; circulating the cleaning solution under pressure of 15 psi through the EGR for a fixed time period or until pressure drops to a preset value; forming a fluid connection between the EGR and the water within the EGR cleaning station; circulating the water through the EGR for one hour; removal of excess cleaning solution and water remaining within the EGR; and, removal of the sealing adaptors of the EGR cleaning station from the terminal ends of the EGR and connecting the EGR to the internal combustion engine; wherein the method of removing engine deposits isolates the EGR without requiring physical removal of the EGR.

### Claim 2 (depends on 1)

The method of claim 1 wherein said EGR cleaning station is primed by connecting said EGR cleaning station to a chemical tank containing the cleaning solution.

### Claim 3 (depends on 1)

The method of claim 1 wherein prior to initiating the method, determining whether cleaning is safe to perform on the engine.

### Claim 4 (depends on 1)

The method of claim 1 further comprising selecting an inlet adaptor to prevent leaks from the terminal ends of the EGR.

### Claim 5 (depends on 1)

The method of claim 1 wherein the cleaning solution temperature is increased from ambient temperature to a temperature exceeding 100° F.

### Claim 6 (depends on 1)

The method of claim 1 wherein the water temperature is increased from ambient temperature to a temperature exceeding 100° F.

### Claim 7 (depends on 1)

The method of claim 1 wherein the circulating the cleaning solution through an inlet hose through the EGR and back to the EGR cleaning station through an outlet hose for three hours followed by the circulating the water through the EGR for one hour.

### Claim 8 (depends on 1)

The method of claim 1 wherein said forming of a fluid connection uses a seal wherein said seal comprises a V band flange connection.

### Claim 9 (depends on 1)

The method of claim 1 wherein the EGR is heated from ambient temperature to a temperature between 50° F. to 100° F.

### Claim 10 (depends on 9)

The method of claim 9 wherein, the EGR temperature is increased by operating the internal combustion engine at idle for 30 to 45 min prior to setting the sealing adaptors of the EGR cleaning station within terminal ends of the EGR.