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I owe Bill Dog continuation, Prius Hack ideas

Posted by Marxist Hacker 42 on Tuesday March 03, 2015 @11:45AM (#2183929)
10 Comments
User Journal

Bill's last set of answers, and my answers to his answers
 
>>1. The only reason to run the gas engine under 25 miles an hour [â Typical residential speed limit] should be for recharging and generating, period. EV mode only at low speed.

>And Toyota may have started out planning on along those lines, but may have gotten focus group research that indicated people preferred a little more acceleration.

Which is weird, because when you put the two electric motors working together, you have MORE acceleration than the gas engine alone. 104 HP vs 70 HP.

>>2. An expert mode should be available wherein "creep ahead at stop" is disabled

>Having switched to owning only manual transmission cars, I only miss that on a metered freeway onramp, that's uphill. I imagine it's added behavior when in electric-only mode, to simulate a slush box, so not sure how it could be universally defeatable. There's no "neutral" on those smug little cars?

There is, it just doesn't auto-engage. The default is creep ahead (and yes, it's electric- it is quite obvious that your gas engine has stopped and it's in stealth mode- which makes it even more dangerous for say, a pedestrian in the cross walk in front of you, no warning roar of the engine as the car speeds up to 8mph slowly).

>>3. Cruise control should also be able to be set by a numeric keypad, and should be able to handle values lower than 23.

>That's an awesome idea, rather than having to bring the car up to the desired speed manually. But I wouldn't be surprised if it's the government disallowing the latter.

It certainly gets them more speeding ticket revenue in 20mph and 15 mph zones. That, and thanks to the "delayed reaction" in the CAN of the prius, I can never seem to hit the correct speed. Always 1mph off, either above or below. And why does slowing down below 23 erase the register, forcing a manual reset, instead of disengaging alone?

>>4. Sport mode should be available that disengages the traction control and enables all three motors for acceleration (you can get the second half of this in a gen2 by angrily stomping on the accelerator, it takes a second to engage, but you suddenly go from 34 HP to 174 HP as the second electric and the gas motor kick in).

>Why would a Prius owner want this?

Ice, sand, and mud. Thanks to the traction control the way it is, and the standard modes, it is impossible to get more than 34hp to the wheels in the first second of travel; and in addition to that, if there is any wheelspin at all, that 34 goes to 0 hp real quick and a little light blinks on to tell you that your transmission is disengaged. A sport mode would enable both drag racing and off road abilities that the prius currently lacks.

>>5. Finer resolution than 5 minutes on the average MPG consumption graph.

>>6. Ability to download trip data onto an SD card.

>Likely never, directly. Companies want your personal info to go to "the cloud" first, so that they can mine it and monetize you further.

I'd even accept an upload to the cloud if I could get fine resolution consumption and the ability to diagnose my driving habits after the fact. The big change in driving a prius isn't so much the technology, it's the feedback given about your fuel consumption, and it occurs to me more feedback is better.

>>7. If gas tank 20% full and battery 20% full, hibernate mode on computer if accidentally left on and wheels are not moving. Right now if you tried to use a Gen2 prius as a backup house generator, you run the risk of bricking the system, unable to boot computer, unable to add more gas, must drag onto a flatbed and tow to Toyota to use their fancy charging system to bring the car back to life.

>I guess you're saying these cars have no under-hood starter battery like ICE vehicles, that's user-swappable with a replacement from any auto parts shop. And I guess neither can these cars be jump-started, simply by using another vehicle (with a battery of equal or greater cold cranking amps). Wow.

More of an in-the-trunk starter battery that is only good for booting the computer system. If you run out of gas *and* the high voltage battery goes totally flat the most you will be able to do is boot the computer, the high voltage battery is needed to spin M1 to be the starter motor (M1 does triple duty- it's a 34 HP electric motor that does the initial acceleration, serves as a generator, and also serves as the starter motor for the gas engine- and it runs off the high voltage battery; M2 is a 70 HP electric engine that can also double as a generator, and then E1 is the gas engine that can send power to the wheels, to M1, to M2, or to all three- quite a complex computerized transmission runs it all). So there would be good reason to provide a hibernate mode that would allow a Prius to be parked for more than three weeks.
I suspect that a plug-in conversion and/or a Gen4 plug in prius is the answer to that last problem- if you're feeding off the grid regularly, there's no need for the gas engine to generate power to begin with.

Five years...

Posted by jawtheshark on Monday March 02, 2015 @04:44AM (#2180401)
5 Comments

Web Dev on the Mac

Posted by stoolpigeon on Friday February 27, 2015 @07:10PM (#2173521)
1 Comment
User Journal

I've been working on a little side project. I would like to have an app where people can read updates that I send out. It seemed like a fun way to learn more about programming mobile apps and it's something I could actually use if I can get it to a decent state.
 
I'm keeping it simple. I decided the app would just be an rss feed reader. And that meant I need a feed. I want it to be very specific to my app so I decided the way to go would be to just create my own back end for creating the feed. I decided to use php and I wrote a simple set up using the codeigniter framework. That gave me a quick way to set up authorization and it was easy to tie in styling from bootstrap so that things can look decent without any effort.
 
I've been doing all the work at my office, on my desktop running Fedora. I have two nice big lcd monitors and developing on Linux is just so easy. I had the environment up and running in no time.
 
Then this week my son got sick. Nothing serious - but enough for him to stay home from school for a few days. I worked from home to keep an eye on him. I've been putting off getting my Macbook set up to do this kind of stuff but now I really needed to tackle it. Ugh - what a pain. The machine itself has grown on me. The hardware is decent and works pretty well. The software isn't horrible. But oh my word - when I want to do anything 'out of the ordinary' and by that I mean any kind of meaningful work with the system, it is pretty bad. I know lots of professional developers use Macs but I'm stunned at what a pain it is to do things that are trivially easy in Linux.
 
Getting Mysql installed and running with Apache was a lot more work. Getting PHP working the way I want took more time than it ever has before. Things are far from ideal even now, but I've got it to a point where it works.
 
And now I have my code in 3 places. So I'll be using github to keep code in sync between them. It's a little more of a challenge because I have the production environment set up a little differently than the dev environment. But not so differently that it is a huge deal. I have ssh access to my hosting environment (Bluehost) so that makes it pretty easy. - Oh and that is the one thing that saves the mac - having bash. If it didn't I'd have given up on it long ago.

Update on the Debian kernel bug

Posted by jawtheshark on Saturday February 14, 2015 @04:15PM (#2154709)
0 Comments

I wonder if I should file a bug with the Debian kernel team

Posted by jawtheshark on Thursday February 12, 2015 @06:46PM (#2153273)
3 Comments

Don't be irreplaceable, if you can't be replaced, you can't be promoted.

 



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