Arrangement structure of exhaust gas sensor
US-2019301341-A1 · Oct 3, 2019 · US
System and method for low co emission engine
US2022010716A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022010716-A1 |
| Application number | US-202117486092-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 27, 2021 |
| Priority date | Aug 19, 2016 |
| Publication date | Jan 13, 2022 |
| Grant date | — |
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Abstract
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In one aspect, a system is provided and includes an engine including an exhaust valve, an exhaust manifold downstream of the exhaust valve and a muffler downstream of the exhaust manifold. The system also includes a catalyst positioned downstream of the exhaust valve.
First claim
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1 . A system, comprising: an engine including an exhaust valve, an exhaust manifold downstream of the exhaust valve and a muffler downstream of the exhaust manifold; a catalyst positioned downstream of the exhaust valve; a fuel injector; and a controller connected with the fuel injector, the controller comprising a processor connected to a memory device storing instructions which cause the processor to perform dithering to run the engine rich/lean for a period of seconds allowing the catalyst to re-oxgenate and control chemical pollutants in exhaust, wherein the dithering is used to find a stoichiometric point of the engine, and the controller is used to control the rich/lean run of the engine along with the dithering speed and amplitude. 2 . The system of claim 1 , wherein the engine is a four-stroke gasoline engine. 3 . The system of claim 1 , further comprising a portable generator configured to be powered by the engine. 4 . The system of claim 3 , wherein the portable generator includes a frame at least partially supporting the engine and at least one wheel coupled to the frame. 5 . The system of claim 3 , wherein the portable generator provides power less than or equal to 10 kilowatts. 6 . The system of claim 3 , wherein the engine is between 80 cubic-centimeters and 224 cubic centimeters. 7 . The system of claim 3 , wherein the engine is between 224 cubic-centimeters and 999 cubic centimeters. 8 . The system of claim 3 , wherein the engine is less than 80 cubic-centimeters. 9 . The system of claim 1 , wherein the catalyst is positioned in the muffler. 10 . The system of claim 9 , wherein a cross-section of the muffler is oval shaped. 11 . The system of claim 9 , wherein the muffler includes an entrance cone for the catalyst. 12 . The system of claim 1 , wherein the catalyst is positioned in the exhaust manifold. 13 . The system of claim 1 , further including an oxygen sensor positioned upstream of the catalyst. 14 . The system of claim 13 , wherein the catalyst and the oxygen sensor are positioned in the exhaust manifold. 15 . The system of claim 14 , wherein the oxygen sensor is positioned about 1 inch from the exhaust valve. 16 . The system of claim 1 , wherein the catalyst is positioned between about 4 inches to about 10 inches from the exhaust valve. 17 . The system of claim 1 , wherein the catalyst is positioned about 6 inches from the exhaust valve. 18 . The system of claim 1 , wherein the catalyst is one of a plurality of catalysts. 19 . The system of claim 1 , wherein the engine includes a plurality of cylinders and the exhaust manifold includes a first portion associated with one of the plurality of cylinders and a second portion associated with another one of the plurality of cylinders, wherein the catalyst is a first catalyst positioned in the first portion of the exhaust manifold, the system further comprising a second catalyst positioned in the second portion of the exhaust manifold. 20 . The system of claim 19 , further comprising a plurality of oxygen sensors, wherein one of the plurality of oxygen sensors is positioned in the first portion of the exhaust manifold and another one of the plurality of oxygen sensors is positioned in the second portion of the exhaust manifold.
Assignees
Inventors
Classifications
Improving ICE efficiencies · CPC title
specially adapted for catalytic conversion (F01N3/22 takes precedence) · CPC title
by varying fuel-air ratio, e.g. by enriching fuel-air mixture · CPC title
Structure or shape of exhaust gas passages, pipes or tubes · CPC title
Mounting or arrangement of exhaust sensors in or on exhaust apparatus (sensor arrangements for engine control F02D41/1439) · CPC title
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Frequently asked questions
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- What does patent US2022010716A1 cover?
- In one aspect, a system is provided and includes an engine including an exhaust valve, an exhaust manifold downstream of the exhaust valve and a muffler downstream of the exhaust manifold. The system also includes a catalyst positioned downstream of the exhaust valve.
- Who is the assignee on this patent?
- Kohler Co
- What technology area does this patent fall under?
- Primary CPC classification F01N1/006. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Jan 13 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).