How about you look up the public schedules for passenger trains, then go to a big, tall bridge and pry up some tracks? Don't forget to jumper a fat wire across the break, as many trains use electric track monitoring systems.
Not only will a train full of passengers plummet to their death, but now countries like the US will panic, and install thousands of monitoring stations covering every mile of track. The economic cost will be staggering and passed onto the train companies, in turn, raising prices dramatically. Shipments and rail travel will grind to a halt, crippling the economy even further.
Terrorist WIN!
Just like china bankrupt itself building the great wall (only to be taken down by one poorly paid, inept guard), the US will spend so much time and money being paranoid it will crumble and fall.
(yes, i know Australia has next to no rail service)
Quick, some nerd out there can figure out in no time what the grand canyon can hold. Solve the water problems of the mid west. Moisture that evaporates from this new water mass in the hot sun there will bring moisture to the entire region
Honda's 'oil actuation system' engages a second rocker arm that hits a higher camshaft via a pin that locks the secondary arm to the primary arm. Remember that a camshaft is one shape. Not variable, it just has a second lobe for higher rpm. I have had Honda factory training and am quite familiar with the system.
The whole point of true electronic acutation is to create a complex map of valve operation that varies in relation to engine load, rpm, throttle, fuel octane, air temperature and a million other variables. Camshafts have a million profile combinations including the amount of overlap (both open at the same time), lift, duration, lift speed, but are limited to a profile that is 'one size fits all' and a compromise, a second if it has a second higher lift cam, and maybe total cam timing if your lucky. By allowing a computer to control all the aspects you can do a lot in performance and economy work that is physically impossible with a mechanical drivetrain. Just like modern fuel management does so much more than a simple mechanical carb.
The ability to run different profiles with software will allow for simple custom tuning of the 'personality. of the motor.
Someone said the new C-class has it. WRONG. It has camshafts with variable valve timing. Allows 1-2 parameters of control for the valves. True electronic actuation allows infinite control. All I have seen is prototypes, like fuel cell cars (race cars don't count).
But it's such a nice dream.
Changing cam timing and/or having a second cam lobe is one thing, but there is a huge advantage to infinitely variable valve timing, right down to the fact that you can eliminate the throttle plate altogether, and the turbulence that it causes.
BMW has been messing with these systems for years . This is not new news. I heard rumors of one of their higher end cars using a throttleless setup, but I am yet to see one. Can anyone correct me? http://tinyurl.com/2flnp6
The main problem is reliability and noise. BMW got fed up because it was almost impossible to make it quiet and reliable. Think: your cam, like a crank accelerates the valve to full velocity then slows it back down to a gentle stop in microseconds. An electric actuator tends to slam on and off. Try that at high rpm. Things break. Anyone got any unobtanium valves? You still have to make it affordable to build, purchase, run and repair, right?
Don't get me wrong, I'm all over an engine that will idle like Aunt Bea's Cadillac and rev like an indy car. Think dashboard selectable engine personality, from mild mannered, economizer, green mode, towing mode, formula 1. Especially if coupled with an electronically controlled turbo. You can also have a multi fuel capable, 13:1 (or higher) compression ratio and boost your efficiency without running your NOx readings thru the roof.
-Lummox (ASE master technician, Canadian journeyman mechanic, millwright)
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How about you look up the public schedules for passenger trains, then go to a big, tall bridge and pry up some tracks? Don't forget to jumper a fat wire across the break, as many trains use electric track monitoring systems. Not only will a train full of passengers plummet to their death, but now countries like the US will panic, and install thousands of monitoring stations covering every mile of track. The economic cost will be staggering and passed onto the train companies, in turn, raising prices dramatically. Shipments and rail travel will grind to a halt, crippling the economy even further. Terrorist WIN! Just like china bankrupt itself building the great wall (only to be taken down by one poorly paid, inept guard), the US will spend so much time and money being paranoid it will crumble and fall. (yes, i know Australia has next to no rail service)
Quick, some nerd out there can figure out in no time what the grand canyon can hold. Solve the water problems of the mid west. Moisture that evaporates from this new water mass in the hot sun there will bring moisture to the entire region
Honda's 'oil actuation system' engages a second rocker arm that hits a higher camshaft via a pin that locks the secondary arm to the primary arm. Remember that a camshaft is one shape. Not variable, it just has a second lobe for higher rpm. I have had Honda factory training and am quite familiar with the system. The whole point of true electronic acutation is to create a complex map of valve operation that varies in relation to engine load, rpm, throttle, fuel octane, air temperature and a million other variables. Camshafts have a million profile combinations including the amount of overlap (both open at the same time), lift, duration, lift speed, but are limited to a profile that is 'one size fits all' and a compromise, a second if it has a second higher lift cam, and maybe total cam timing if your lucky. By allowing a computer to control all the aspects you can do a lot in performance and economy work that is physically impossible with a mechanical drivetrain. Just like modern fuel management does so much more than a simple mechanical carb. The ability to run different profiles with software will allow for simple custom tuning of the 'personality. of the motor. Someone said the new C-class has it. WRONG. It has camshafts with variable valve timing. Allows 1-2 parameters of control for the valves. True electronic actuation allows infinite control. All I have seen is prototypes, like fuel cell cars (race cars don't count). But it's such a nice dream.
Changing cam timing and/or having a second cam lobe is one thing, but there is a huge advantage to infinitely variable valve timing, right down to the fact that you can eliminate the throttle plate altogether, and the turbulence that it causes.
BMW has been messing with these systems for years . This is not new news. I heard rumors of one of their higher end cars using a throttleless setup, but I am yet to see one. Can anyone correct me? http://tinyurl.com/2flnp6
The main problem is reliability and noise. BMW got fed up because it was almost impossible to make it quiet and reliable. Think: your cam, like a crank accelerates the valve to full velocity then slows it back down to a gentle stop in microseconds. An electric actuator tends to slam on and off. Try that at high rpm. Things break. Anyone got any unobtanium valves? You still have to make it affordable to build, purchase, run and repair, right?
Don't get me wrong, I'm all over an engine that will idle like Aunt Bea's Cadillac and rev like an indy car. Think dashboard selectable engine personality, from mild mannered, economizer, green mode, towing mode, formula 1. Especially if coupled with an electronically controlled turbo. You can also have a multi fuel capable, 13:1 (or higher) compression ratio and boost your efficiency without running your NOx readings thru the roof.
-Lummox (ASE master technician, Canadian journeyman mechanic, millwright)
"And no animal shall run red lights" ..except pigs..