Cat Marine Flexible Camshaft Technology

[Squarerig]

Thank you also,whorayful.I now understand.I am aware that one picture can say more than a thousand words but,sometimes a written explanation helps as well.Thank you all and a Happy Christmas

[wiseman7862000]

best design for mechanical engine to reduce emission.however the introduction of electronic engines with unit injectors solve the problem of emission. the software inside ecm will control the injection timing and duration by checking certain inputs like boost pressure, temp etc this will reduce emission,

[sinclairopaline]

Compleatly brilliant,the person who thought this up must be proud and I hope he got so rich from it. Ah Capitolism is great, But Obama nigger is going to take away capitolism.

[nch8]

@sinclairopaline capitalism with an A not an O. Maybe if you pulled your finger out of your sister and learned to spell you might not have this problem.

[sinclairopaline]

@nch8 So I misspelled, is that really your problem with my comment? No, you must be a bearded little have nothing own nothing , property(land) socialist. Little basterd...go ride yor bike, I like my bike but I like to smoke up the air with my diesel also.

[cotedoug1988]

@nch8 you sir, are a fuckin tool bag

[nch8]

@cotedoug1988 You mad?

[Squarerig]

SS Thank you for the explanation ;all is light where formerly I wandered in the gloom.For one brief moment I visualised a camshaft out of rubber but immediately ,"That can't be right"

[Squarerig]

I am no engineer.Could someone please explain to me what a flexible camschaft is and what its advantages over a rigid camschaft are?

[Swiggityswagger]

@Squarerig Its not flexible in the sense that it bends. Its flexible in that the rotating speed of the cam can be adjusted independent of engine speed. So the timing of the valves (opening, open duration, closing) can be adjusted for different load conditions. One cam profile cannot give max efficiency in all engine loads so flexible cams allow for cam timings to be adjusted to provide better efficiency across the engine load spectrum

[whorayful]

@Squarerig In simple terms the camshaft timing can be advanced or retarded relative to the crankshaft. Car makers usually call it VCT, or DVCT for twin cam motors. As Swiggityswagger correctly said, one cam timing position means the engine breathes best at only one speed range, the 'power/torque band', having Variable cam timing widens the power/torque band making the engine more efficient and flexible.

[sertox12345]

dont show the f japs nothing they are going to copy this like they copy every thing in this world i f hate them cat fired 12000 workers

[dx80cruiser]

@sertox12345 And the world copied the Germans when it came to the Diesel engine, so no whining

[kenny10rendon]

heck yeah thats whats up



[ArcticRenegade]

a diesel Vtec... that's amazing.

[teamlaguna]

CAT ROCKS !

[maxhauler]

My own direct experience with variable valve timing is with the legendary Honda H22A but I've noted the details of other designs as well. Of all I have seen, this CAT system is the most elegant solution IMO and potentially I would think also the most reliable because it appears to use the simplest mechanical method, involving minimal adverse forces/wear.

[clatterpillar]

wow thats so simple ...@ 1:50 the rocker arm shaft moves closer to the cam.... making the rocker arm travel farther ... there for moving the valves more ... that is too cool

[absmonkeyracing]

Looks like MVT re invented lol.

[paintycanjay]

Can someone explain how FCT works? What actuates the fct drive -- is it based off load or RPM or whaaa? Trying to find a place online that goes over this but no luck so far

[whorayful]

@paintycanjay Usually FCT is based on engine speed in diesels. The air moving into the cylinders only moves as fast as the atmosphere or the turbo pushes it. To get the maximum air in at high engine speeds the inlet valve is opened earlier so the incoming charge is already moving before the piston begins the down stroke, the vaccum created by the exiting exhaust gas during 'valve overlap' helps get the flow moving, that's the secret behind well designed headers by the way.

[discountbrains]

I wonder if you could make a nice video for me of my engine at: "high performance engine discountbrains". A video of my engine would be nowhere near as elaborate, but you sure make a nice videos. Oh I see you are caterpillar. Just the same maybe you could put me in touch with who did this video. Maybe you would also be interested in my engine.

[XELA2T]

exellent animation, but without sound it is difficult for none professionals to see the clou of it. The clou is shown at the end of the animation where the lifting levers of the push rods are displayed. They are variable due to excentrical bearing. This allowes to variate the stoke length and with this the whole timing of the valves in accordance to slow or high revs. of the running engine.