تبلیغات
مهندسی کشتی - Variable Injection Timing (VIT) control
پنجشنبه 7 مرداد 1389

Variable Injection Timing (VIT) control

   نوشته شده توسط: علی بنوتی    





This allows for ideal matching of load to injection timing

for various qualities of fuel. The Barrel insert can be moved up and down by action of the Nut. This has the effect of altering the position of the spill port relative to the plunger stroke.

Therefore the beginning of injection is altered. The end of injection is varied by its normal way of rotating the plunger.

 

The Nut, which moves linearly, is controlled by the VIT rack, this is altered- continuously by the engine management.

Pump adjustment-Individual pumps may be adjusted in order to account for wear in the pump itself or the entire range of pumps can be adjusted to suit particular loads or fuel ignition quality. Individual pumps are adjusted by means of the screwed links from the auxiliary rack to the nut, just as the main rack adjustment is carried out. Adjustment of all pumps is simply by movement of the auxiliary fuel rack.

Problems associated with jerk pumps-the main problem with pumps of this type is that sharp edges on the plunger and around the spill port become rounded. As injection commences when the spill port is covered by the plunger, this means that later injection takes place. With the variable injection pump this can be accounted for by lowering the barrel insert and hence the spill port, so that it is covered at the required point. In older type pumps, adjustment required washes and shims to be placed between the plunger foot and cam follower or shims removed from below the pump body in order to lower it and the spill port relative to the plunger. Wear also causes leakage between the plunger and barrel but the only solution is replacement. Original timings must be restored.






برچسب ها: Variable Injection Timing (VIT) control ،

How do you treat Achilles tendonitis?
پنجشنبه 23 شهریور 1396 10:21 ق.ظ
I love it when people get together and share views. Great website, keep it up!
foot pain exercises
چهارشنبه 7 تیر 1396 08:12 ب.ظ
My brother suggested I might like this web site.

He was once totally right. This submit actually made my day.
You cann't imagine simply how so much time I had spent for this information! Thanks!
http://vernitakibbey.weebly.com/blog/hammer-toe-repair-recovery
دوشنبه 5 تیر 1396 07:59 ب.ظ
Hello my family member! I want to say that this article is
amazing, great written and include almost all significant infos.
I would like to peer extra posts like this.
joshualearned.hatenablog.com
شنبه 9 اردیبهشت 1396 02:40 ب.ظ
Glad to be one of the visitors on this awesome web site :
D.
BHW
دوشنبه 28 فروردین 1396 03:53 ب.ظ
Fabulous, what a weblog it is! This blog provides helpful information to us, keep it up.
manicure
سه شنبه 22 فروردین 1396 08:59 ب.ظ
Generally I don't read article on blogs, but I would like to say that this write-up very compelled
me to take a look at and do so! Your writing style has
been amazed me. Thanks, very nice post.
manicure
پنجشنبه 17 فروردین 1396 05:43 ب.ظ
Hi there I am so grateful I found your weblog,
I really found you by accident, while I was searching on Yahoo for
something else, Anyhow I am here now and would just like to say thanks a lot for a tremendous post
and a all round exciting blog (I also love the theme/design), I don't have time to look over it all at the minute but I have saved it and also included your
RSS feeds, so when I have time I will be back to read a great deal more, Please
do keep up the superb job.
manicure
چهارشنبه 16 فروردین 1396 10:42 ق.ظ
Hi colleagues, good post and fastidious urging commented here, I am actually enjoying by these.
 
لبخندناراحتچشمک
نیشخندبغلسوال
قلبخجالتزبان
ماچتعجبعصبانی
عینکشیطانگریه
خندهقهقههخداحافظ
سبزقهرهورا
دستگلتفکر