The Bajulaz engine
The Bajulaz engine
(OP)
Makes the usual claims for prototype novel engines, 50% efficiency in particular. So, who understands it? What is its weakness?
http://www.bajulazsa.com/Site/sixstroke.html
http://www.bajulazsa.com/Site/sixstroke.html
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.





RE: The Bajulaz engine
RE: The Bajulaz engine
RE: The Bajulaz engine
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: The Bajulaz engine
RE: The Bajulaz engine
Franz
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: The Bajulaz engine
I’m sure the high temperature valve and guide would have to be special in order to live 150,000 miles without increasing pollution levels as will be required in the upcoming regulations.
Ed Danzer
www.danzcoinc.com
www.dehyds.com
RE: The Bajulaz engine
I see a regular intake and exhaust valve on the right. That much I understand.
The unique part of the hardware is an annular air gap around the prechamber/remote chanber, with the connections between the cylinder and the annulus and between the cylinder and the chamber individually valved.
But I'm not understanding all of the valve timing/ injection timing and gas dynamics.
Mike Halloran
Pembroke Pines, FL, USA
RE: The Bajulaz engine
One other issue is that the dead space in the system is large, and the poppet valves will need further dead space in which to operate. This gives you permanent EGR.
Obviously power for a given bore stroke and rpm will at best be 2/3 that of a 4 stroke.
fmep will be higher by 50% as well.
My guess is that it would show better sfc at part load than a 4 stroke, if anywhere, but that at full load (ie 66%) it would not.
The valve life is the killer.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.