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A C8 Motor Patent?

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  • A C8 Motor Patent?

    Might this also be part of the mid engine Corvette’s motor enhancements? Even in the upcoming LT2 that is widely believed to be in the entry, first year C8?

    For the complete, nine page, full-size patent pictures, and patent language, please see post # 2.

    Originally posted by gmauthority
    GM Patents Innovative New Integrated Oil Separator AssemblyGeneral Motors has just patented a passive two-stage oil separation assembly for crankcase ventilation, GM Authority has uncovered.


    Assigned serial number 10,151,225 at the United States Patent and Trademark Office (USPTO), the GM patent was filed on October 26th, 2016 and granted on December 11th, 2018. Titled “integrated oil separator assembly for crankcase ventilation”, the patent lists Ko-Jen Wu and Jason C. Melecosky as its inventors.

    The patent is comprised of two primary parts – an explanation of the claims made in regard to the oil separator assembly’s abilities, and a collection of six images that illustrate the actual parts as well as their locations on a hypothetical engine.

    The Engineering


    The proposed two-stage oil separation system is comprised of the first oil separator, which is mounted to the wall of the crankcase, and a second oil separator mounted to the first oil separator. This second separator provides further filtration.

    The location of the first oil separator is dependent on the location of the first blow-by flow passage of the crankcase ventilation system as well as the first drain passage. The first oil separator’s internal baffling acts as a second blow-by flow and third drain passage, with the third drain passage flowing to the second drain passage of the crankcase ventilation system. A second oil separator is then mounted to the first oil separator, aligning with the third drain passage. The design of the second oil passage can then be altered to include a plurality of internal baffles or a filter. In Plain English


    If all that engineering jargon is too much, here’s an explanation in simpler terms: the crankcase ventilation system will vent air out through a first oil separator, and – through the use of check-valves – it may continue to a second oil separator. The direction of the air is dictated by blow-by flow passages, and the separated oil is returned through drain passages.

    The air vented from the crankcase can go to one or more openings, including an air intake system which can include a turbocharger. The second oil separator can include a pressure regulator valve that can regulate the system’s pressure via check-valves.

    The Benefits


    An improved oil separation process can alleviate pre-ignition due to oil in the combustion chamber, which is a common symptom of small-displacement, turbo-charged engines.

    In addition, the presence of oil in the combustion chamber can lead to particulates in the exhaust as a byproduct, which raises health concerns. Where To From Here?


    As emissions regulations continue to become ever more stringent, General Motors will be forced to deliver innovative ways to deliver cleaner and more efficient engines for its vehicles. In that regard, this two-stage oil separation system can certainly assist in doing so. The idea makes even more sense when one considers the fact that GM is beginning to use a highly-boosted, four-cylinder engine in full-size pickup truck applications – as it’s doing with the 2.7L I4 L3B engine in the 2019 Chevrolet Silverado 1500 and 2019 GMC Sierra 1500.



    Considering the patent was originally filed over two years ago (in October of 2016), we believe that GM is looking to implement the proposed oil separation technology on a production engine at some point in the near future. In short, we expect to see a system like this one implemented in the near future as GM continues to improve and refine its technology while also meeting the demands of emissions regulations. Patent Document


    Check out the complete patent application in its nine-page glory right here (PDF file format). GM Oil Separator Patent October 2016 004GM Oil Separator Patent October 2016 003GM Oil Separator Patent October 2016 002GM Oil Separator Patent October 2016 001
    Last edited by John; 01-30-2019, 01:00 PM.
    GBA Black; HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5VM visible carbon fiber package; 5ZZ high wing; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards; RCC Edge Red engine cover; VJR illuminated sill plates. Lifetime, annual contributors, and 23 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.

  • #2
    Complete patent application thanks to gmauthority and USPTO:

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    Last edited by John; 01-30-2019, 12:55 PM.
    GBA Black; HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5VM visible carbon fiber package; 5ZZ high wing; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards; RCC Edge Red engine cover; VJR illuminated sill plates. Lifetime, annual contributors, and 23 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.

    Comment


    • #3
      Complete C8 patent potential list:

      https://www.midenginecorvetteforum.c...-c8-me-patents
      GBA Black; HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5VM visible carbon fiber package; 5ZZ high wing; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards; RCC Edge Red engine cover; VJR illuminated sill plates. Lifetime, annual contributors, and 23 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.

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      • #4
        So, essentially admitted that catch cans were necessary on the LT1 and LT4 engines....
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        • #5
          GM did not. If you re-read the patents in first paragraphs in page 7, GM is describing why they are doing more for the future.
          GBA Black; HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5VM visible carbon fiber package; 5ZZ high wing; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards; RCC Edge Red engine cover; VJR illuminated sill plates. Lifetime, annual contributors, and 23 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.

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          • #6
            I agree that we could well see this upgrade on the LT2.

            Comment


            • #7
              "Even in the upcoming LT2 that is widely believed to be in the entry, first year C8?"

              Glad we settled on a name for it...LT2...will be fun to see the changes.

              Comment


              • #8
                Originally posted by John View Post
                GM did not. If you re-read the patents in first paragraphs in page 7, GM is describing why they are doing more for the future.
                But the issues this addresses clearly exist in the C7 engines. The amount of oil I get in my catch can is proof of that.
                Delivered 5/29!: Scarlet Fever 2021 2LT HTC, Red Mist Metallic Tintcoat, two-tone Natural w/ suede inserts, Mag Ride, Performance Exhaust

                Gone but not forgotten: SunKissed, 2015 2LT, 7MT, Black over Daytona Sunrise Orange Metallic, Stingray convertible

                Proud member of the Old Dominion Corvette Club: https://www.olddominioncorvetteclub.org/

                Never grow up - It's a trap.

                Comment


                • #9
                  Turbo engines are worse in this regard than NA or SC. This might be for one of their cadillac TT V8 engines.

                  Edit - Don't the illustrations look like a 4cyl engine? This just may be for one of their small car turbo I4 engines too.
                  Last edited by Biltmore; 02-08-2019, 01:03 AM.

                  Comment


                  • #10
                    I’ve got to agree with Meyerweb on this one. The patented oil recovery/separation system should go a long way to the mitigation of oil vapors in the intake system and resulting “coking” of intake valves, in direct injection engines. Yes, turbocharging exacerbates the issue and this new “process” seems to finally take positive steps in correcting the oil separating need. Hooray GM?

                    Comment


                    • #11
                      Click image for larger version

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                      GBA Black; HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5VM visible carbon fiber package; 5ZZ high wing; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards; RCC Edge Red engine cover; VJR illuminated sill plates. Lifetime, annual contributors, and 23 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.

                      Comment

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