Diesel exhaust brakes

[HickoryFarms]

Hick,

I suggest you take up your argument with Cummins. They will be delighted to learn how their own turbos are designed and what they should be called.

Holset provides the chargers to cummins.

 

[Raspy]

Holset provides the chargers to cummins.

Cummins manufactures the turbos and calls them Holset VGT turbos. Holset has been owned by Cummins for 30 years and Cummins has numerous patents on this design. The engine computer is programmed to operate them in conjunction with the transmission. I'm sure they would be interested in your theories about what is inside and what the parts are called. If you do a bit of reading, you'll see how they are designed, how the brake works, what the parts are called and why they are called VGT. Ram was very proud of these new turbos when they first came out on the 6.7. A simple way of varying exhaust velocity to the turbine at different throttle positions that reduces lag but doesn't limit horsepower at higher throttle settings. The design also allowed for an engine brake by simply moving the vane ring beyond the low throttle setting to create high back pressure. Ooops, I forgot, "there is no ring". Hmmmm. Maybe you should take another look. All you have to do is go look at an exploded view.

Here's a video that shows the fixed vanes and the sliding ring that you say don't exist:
HE341VE HE351VE HE3VG Nozzle Ring Replacement - YouTube

Here's a video that shows the sliding ring in action and the fixed vanes.:

Cummins Turbo Technologies HE4VG - Animation - YouTube

 

[HickoryFarms]

Cummins manufactures the turbos and calls them Holset VGT turbos. Holset has been owned by Cummins for 30 years and Cummins has numerous patents on this design. The engine computer is programmed to operate them in conjunction with the transmission. I'm sure they would be interested in your theories about what is inside and what the parts are called. If you do a bit of reading, you'll see how they are designed, how the brake works, what the parts are called and why they are called VGT. Ram was very proud of these new turbos when they first came out on the 6.7. A simple way of varying exhaust velocity to the turbine at different throttle positions that reduces lag but doesn't limit horsepower at higher throttle settings. The design also allowed for an engine brake by simply moving the vane ring beyond the low throttle setting to create high back pressure. Ooops, I forgot, "there is no ring". Hmmmm. Maybe you should take another look. All you have to do is go look at an exploded view.

Here's a video that shows the fixed vanes and the sliding ring that you say don't exist:
HE341VE HE351VE HE3VG Nozzle Ring Replacement - YouTube

Here's a video that shows the sliding ring in action and the fixed vanes.:

Cummins Turbo Technologies HE4VG - Animation - YouTube

Ok, so you are correct in that the holset VGT does indeed have a sliding nozzle and ring controlling the vanes. They still differ from VVT and VNT turbochargers. I’d still like to know where you are getting 140 pounds of drive pressure at, or, retarding HP?

 

[Raspy]

Hick,

I never said anything about 140 PSI drive pressure or that it was the same as horsepower. I only talked about the retarding horsepower as listed in the evic. The gauge goes up to 230 HP, but I've only seen about 140. The evic displays the value in a graph and numerically, in horsepower.