Results 1,061 to 1,070 of 2348
-
Verified Tsikot Member
- Join Date
- Sep 2004
- Posts
- 161
August 17th, 2010 08:51 AM #1061
-
Verified Tsikot Member
- Join Date
- Sep 2004
- Posts
- 161
August 17th, 2010 04:09 PM #1062mukhang nakuha ko na solution sa problem ko sir. galing ako sa mekaniko malapit lang dito sa amin, tinanggal nya lang yung vacuum hose sa egr ata yun, not really sure about the part pero nakamount lang dun sa may engine. ok na ang pick up ng power nya tuloy tuloy kahit steady lang paa mo sa accelerator at wala ng white smoke dahil di na sya nabibitin. by the way, pag nirev nyo po ba engines nyo sa full throttle umaabot ba ng 6k ang rpm? akin kasi halos 5 lang e. is this normal? thanks
-
Verified Tsikot Member
- Join Date
- Dec 2009
- Posts
- 16
August 17th, 2010 08:15 PM #1063
-
Tsikot Member Rank 2
- Join Date
- Sep 2006
- Posts
- 1,335
August 18th, 2010 01:53 PM #1064
-
August 24th, 2010 12:39 AM #1065
Sir Dieseldude:
I was able to download a copy of the BOSCH training manual for the VE-series of injection pumps, licensed versions of which are installed on our Toyota HiLux and my Mazda B2500.
Naturally I was curious to see how they worked.
I understand that the pump advances injection timing using a hydraulic piston driven by fuel pressure to turn the rollers against pump rotation.
As the engine speeds up, fuel pressure as delivered by the vane-type supply pump rises, so more pressure is available to advance the injection timing.
Internal fuel pressure is controlled by a valve connected to the pump's output and a matching bleed orifice.
Now the manual says that the system also advances timing on increase of load - but how does it do that?
There doesn't seem to be a connection between the governor and the advance mechanism.
Thanks a bunch in advance.
Sincerely,
Dusky Lim
-
Tsikot Member Rank 2
- Join Date
- Sep 2006
- Posts
- 1,335
August 26th, 2010 02:11 AM #1066Sir Dieseldude:
I was able to download a copy of the BOSCH training manual for the VE-series of injection pumps, licensed versions of which are installed on our Toyota HiLux and my Mazda B2500. Naturally I was curious to see how they worked.
I understand that the pump advances injection timing using a hydraulic piston driven by fuel pressure to turn the rollers against pump rotation. As the engine speeds up, fuel pressure as delivered by the vane-type supply pump rises, so more pressure is available to advance the injection timing.
Internal fuel pressure is controlled by a valve connected to the pump's output and a matching bleed orifice.
Now the manual says that the system also advances timing on increase of load - but how does it do that? Timing normally advances when rpm increases without load. Timing slightly retards when the engine is loaded because fuel output to the injectors increases, therefore reducing pressure on the timing advance piston. Some VE pumps may have an electronic timing control valve to control pressure on the timing piston. It can alter timing as needed by the engine.
There doesn't seem to be a connection between the governor and the advance mechanism.
Thanks a bunch in advance.
Sincerely,
Dusky Lim
-
August 28th, 2010 11:50 PM #1067
Sir Dieseldude:
So just to confirm - on the BOSCH Mechanical Governor VE pumps, there seems to be NO control of the injection timing advance for LOAD - just for SPEED.
Is there a provision for injection timing advance on Electronically-governed BOSCH VE pumps?
You also mentioned that during large increases of load injection timing RETARDS due to loss of fuel pressure.
If that is so, can it be compensated for by placing a pressure-sensitive valve on the pump restriction/outlet so that losses in pressure are compensated for?
You know on old-model gasoline cars, there is usually a tap to the carburetor's venturi's that connects to a vacuum-advance diaphragm on the distributor.
This serves to advance ignition timing with load - as higher engine airflows result in higher vacuum/depression.
Thus even with engine RPM's low, if you step hard on the accelerator, the high initial airflow causes ignition timing to advance.
If you remove or disconnect this advance line the car's performance is severely affected.
Is this lack of timing advance under load one of the reasons older diesel engines don't perform as well as their gasoline counterparts?
Thanks again.
Dusky Lim
-
Verified Tsikot Member
- Join Date
- Oct 2007
- Posts
- 56
August 31st, 2010 02:58 PM #1068Hi Sir Dieseldude,
My ride is a JDM Pajero, 4d56 TDIC engine and A/T.
Problem is when I go on a full stop, o kahit slow down lang na almost stop na, parang nasasakal/nabubulunan yung makina. Kahit anong rev mo ayaw umusad. Maghihintay ka ng mga 3-4 seconds bago mo maramdaman na magaan na ulit sya saka ako aapak ulit sa accelerator tapos aandar na sya. Di naman namamatay ang makina. Ramdam ko din na kahit nasa D ang A/T setting pag binitawan mo yung accelerator habang umaandar parang nakaapak ako slightly sa brake.
Dinala ko sya sa isang shop this weekend. Ang ginawa nila to test ni-rev ng ni-rev ang makina while A/T is at P. Sabi baka calibration kailangan kaya lang ang laki ng quote kaya di ko pinaayos. Pag-alis ko sa shop pakiramdam ko mas nakahinga makina. Di na lumalabas yung problema pag slow down lang pero pag full stop ganun pa din. Somehow, I guess, nakatulong yung pag-rev nila paulit ulit ng todo sa makina.
Air filter is two weeks old, changed fuel filter January this year, change oil and oil filter last month.
What could be the problem here, sir?
Salamat po.
-
Verified Tsikot Member
- Join Date
- Sep 2004
- Posts
- 161
September 1st, 2010 12:07 AM #1069
-
Verified Tsikot Member
- Join Date
- Mar 2010
- Posts
- 13
September 1st, 2010 09:27 PM #1070Good day to all,
We have opened a new Denso Service Dealer. Our mainly line is servicing Fuel Injection pump. We are able to fix Electronic and mechanical pumps using only original Denso parts making it good as new and Common rail injection pumps for all car manufacturers. We also have other Denso products having affordable prices. E.g. Horns, Wipers and etc.
Hope you can support us.
Thanks!
Diesel Mack Werkes Corporation
81 Mayor Gil Fernando Ave., Brgy. San Roque, Marikina City
Tel no: 369-9199/ 0932-328-7778/ 0915-313-7117
Be careful with channels like "China Observer" on YouTube. There is a clear bias in their posts and...
Xiaomi E-Car