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this is what our diesels need , no more timing belts
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=75746		 Page 1 of 1
Author:  ibedonc [ Wed Jun 26, 2013 11:08 am ]
Post subject:  this is what our diesels need , no more timing belts
this is what our diesels need , no more timing belts

http://www.wimp.com/combustionengine/
Author:  dieseldoesit [ Wed Jun 26, 2013 11:29 am ]
Post subject:  Re: this is what our diesels need , no more timing belts
or go full boogy and just use an electric motor and batteries...
Author:  geordi [ Wed Jun 26, 2013 1:04 pm ]
Post subject:  Re: this is what our diesels need , no more timing belts
Very interesting, but didn't GM already develop variable valve timing? I thought their system might have been based on an electric actuator rather than this air pressure system. They don't say where they get the air from, but a diesel has more than enough power to add a small continuous compressor and take-up air tank. Bigger truck diesels already have the air system built in.

Durability will be the real question, but I like the thought that this completely removes the need for camshafts from the timing system. No more lifters, no more rockers, no more mechanical losses from driving all that mechanical mess. All you need to drive then is the water pump and the fuel pump. That could lead to a big jump in economy!
Author:  dieseldoesit [ Wed Jun 26, 2013 1:17 pm ]
Post subject:  Re: this is what our diesels need , no more timing belts
geordi wrote:
Very interesting, but didn't GM already develop variable valve timing? I thought their system might have been based on an electric actuator rather than this air pressure system. They don't say where they get the air from, but a diesel has more than enough power to add a small continuous compressor and take-up air tank. Bigger truck diesels already have the air system built in.

Durability will be the real question, but I like the thought that this completely removes the need for camshafts from the timing system. No more lifters, no more rockers, no more mechanical losses from driving all that mechanical mess. All you need to drive then is the water pump and the fuel pump. That could lead to a big jump in economy!


I think GM just rotated the cams with respect to their sprockets based on engine RPM.
Author:  geordi [ Wed Jun 26, 2013 1:28 pm ]
Post subject:  Re: this is what our diesels need , no more timing belts
dieseldoesit wrote:
I think GM just rotated the cams with respect to their sprockets based on engine RPM.


I don't know exactly how their system works, but just rotating the lobes wouldn't (I don't think) give you the ability to shut the cylinder off completely and not still generate SOME compressive resistance. The video mentioned Audi and "sliding" the lobes along the length of the cam, so there must be some way that doing that wouldn't affect the lifter itself. In our CRD system, moving the lobe would just knock the rocker off the valve, and the whole thing would fall apart! :shock:

Interesting times, for certain.
Author:  flash7210 [ Wed Jun 26, 2013 1:44 pm ]
Post subject:  Re: this is what our diesels need , no more timing belts
Cam-less engine with electric solenoid valves.

Image
Author:  Sir Sam [ Thu Jun 27, 2013 8:39 pm ]
Post subject:  Re: this is what our diesels need , no more timing belts
This concept is not new and different iterations have been around awhile, but like any new technology it takes many years of development before it reaches a point where it is feasible for large scale practical implementation.
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