Doc inlet temp during regen
Since these high temperatures generally fo not occur during normal engine operation, a number of strategies are used to actively increase the exhaust temperature [4]. Active regeneration systems may include the use of a diesel burner to directly heat the exhaust entering the DPF or the use of a diesel oxidation catalyst (DOC) to oxidize diesel ...If your psi sensor is cleared and your temps still don’t come up, you’ll need to pull the DPF’s back out and Blow or out the DOC’s. Remove the 1-box inlet and rig a good vacuum cleaner to or all that soot will settle in front of the DOC and plug at least part of them again!During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. 11. Perform High Idle Regeneration. 12. When regeneration is complete, clear all fault codes. 13. Road test the vehicle. a. If no fault codes appear, testing is complete. Verify ...
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Right away I noticed that the DOC inlet temperature reading was at 662 F (default max value as I found out) @ 1.7V, yet the outlet temperature was 419 F @ 1V . These thermo-couples run on 5V and generally have a much larger spread between temperature/voltage correlation. Now it was time to let the data talk.11/5/2020 Regeneration - DOC Inlet Temperature Unable to Reach HC Dosing Temperature ... • SPN 3713/FMI 14 High Idle Regen (aborted) - Low Regen Temp • SPN 4077/FMI ALL Hydrocarbon (HC) Doser Fuel Line Pressure 2.a Yes; perform the troubleshooting for the fault code.2021年7月13日 ... A blocked doser can prevent the temperature increase necessary for an effective regen. ... If the DOC's inlet face gets clogged with an excessive ...May 4, 2021 · Hey Nick, I got a 2014 KW T800 with a paccar mx13. Got some fuel dosing regen issues.VIN: *****Unit will get up to 500 degrees at DOC inlet during regen and begin to dose fuel. DOC outlet … read more Right away I noticed that the DOC inlet temperature reading was at 662 F (default max value as I found out) @ 1.7V, yet the outlet temperature was 419 F @ 1V . These thermo-couples run on 5V and generally have a much larger spread between temperature/voltage correlation. Now it was time to let the data talk.Active regeneration is usually not noticeable to the driver. The vehicle needs to be driven at speeds above 30 mph for approximately 20 to 30 minutes to complete a full regeneration. During regeneration, the exhaust gases reach temperatures above 1,000°F (550°C). Active regeneration is usually not noticeable to the driver. Ash Loading During a proper regen, DOC inlet temp, or temp #1, should be about 550-600. DOC outlet temp, or temp #2, should be 1000-1200 degrees. DPF outlet temp should be 950 to 1200. In a healthy system, the engine injects fuel into the exhaust during a regen that the DOC burns to create the heat. The heat is used to BAKE down the collected soot in the DPF.2015年2月2日 ... I replaced the DOC inlet and outlet temp sensors along with the DPF outlet sensor and all are reading within 3 degrees of each other when the ...The calibration results of (a) DPF outlet temperature and (b) DPF pressure drop during active regeneration. DPF regeneration conditions: DPF SV = 20,000 h-1 , DPF soot loading = 4 g/L, DPF inlet ...Once the nozzle was cleaned out it would do the regen and the high soot level code went inactive. I'm working on an 08 Western Star with a 60 series Detroit with EGR and DPF. It is a 06R0998711 engine. It has an active 3719 High Soot Level code. The engine runs for about 2 minutes and then shuts down.... DOC-boosted temp of 1100 deg. , we would have ... There WAS distinct mention of a "post" injection, which operated only during active regen,...Tractor was towed in with engine warnings on, and in shutdown mode.Active faults for soot level high, and failed regen. due to temp. Inlet DOC temp only at 425, wont go high enough to start dosing fuel. Intake throttle valve is working. Will continue on diag tomorrow. Any thoughts? Thanks.During a parked regen on a DD15, the SCR Inlet NOx sensor should be around 200-300ppm. DD13 SCR Inlet NOx sensor is slightly higher around 400-500ppm. The SCR Outlet NOx should be somewhere in the neighborhood of 5-25ppm for all DD Platforms. The other true method in testing the NOx sensors is to perform a regular parked regen, then perform ...You can tell by watching your temperatures during a regen. If your DPF intake is lower then your DPF outlet, and theyre both above 800F, it's called 'inverted temps'which indicate your DOC ...more ...Nov 7, 2014 · Here's the "normal" values for all of the Aftertreatment Parameters during a Parked Regen. *Note* On a DD13, there are 3 important parameters that will have higher values than the DD15 or DD16. -Turbo Speed 38,000-42,000 rpm. -SCR Inlet NOx Sensor 400-500 ppm. -Actual DEF Dosing Quantity 900-1100 g/h. May 5, 2021 · Introduction. During the thermal regeneration process of the diesel particulate filter (DPF), the exhaust temperature at the DPF inlet needs to be heated up to above 500 °C to oxidize the accumulated soot particles in an efficient way [1], [2], [3].
Engine Based Measures Overview. It has been long recognized that increased exhaust gas temperature levels can be achieved through a number of engine management measures [379].While engine based options to thermally manage exhaust gas are inefficient due to the engine and exhaust system mass upstream of the exhaust catalysts and the …Inspect the intake pressure/temperature sensor and wiring connector for signs of damaged, bent, spread, corroded or ... During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. 3. Start the engine; using DiagnosticLink start the NOx Sensor ...During the DESA NOX sensor test, mine never went above 275ppm inlet and 200 outlet at 1700 rpm. Remember the outlet should always be lower than the inlet due to the DEF being injected into the exhaust prior to the SCR catalyst and passes the outlet sensor on the way out the exhaust pipe. My DPF inlet temp will reach 1250, outlet temp 1200.SUBJECT: Modified Parked Regeneration Concerns ISSUE The call center has received a number of calls regarding concerns about the modified parked ... modified parked regeneration utilizes increased DOC inlet temperature to clean the DOC inlet face. Excessive torque loads can cause parked regenerations to abort. In some cases the . 19 TS-6 - 4 -
Just an FYI there will be no HC dosing for the first 12 ish minutes of the regen. The doc inlet temp will raise around that 700-800 degrees mark in that first 12 min to burn Soot …During vehicle operation, active regeneration is performed when the accumulated soot and ash reach boundary limits. In this operation, the particulate soot is ...In active DPF systems, HCs are introduced into the exhaust gas (via engine post-injection or exhaust injection) and oxidized over the DOC in order to increase the DPF inlet temperature. This functionality is typically combined with NO 2 generation for passive DPF regeneration.…
Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. During testing, temperature of exhaust gas can become 1500°F . Possible cause: If DPF outlet temp stays above the inlet temp then the DOC isn't working probably. L.
Had a forced Regen done and off I went. 150 miles later the same code came back again. so I ignored it for another 250 miles and then second alert saying Air Intake system problem. Had a second Regen done and noticed Inlet manifold pressure was very high but as the regen was going on this issue reduced to normal levels.If your psi sensor is cleared and your temps still don’t come up, you’ll need to pull the DPF’s back out and Blow or out the DOC’s. Remove the 1-box inlet and rig a good vacuum cleaner to or all that soot will settle in front of the DOC and plug at least part of them again!During a regen the boost psi should be under 10 psi for engines with out a recirculation valve, with the recirculation valve it will be slightly lower. If boost psi is too high remove the sra and verify the turbo sector shaft sweep. It should be smooth and feel a solid stop both ways (there is a tool for verifying full sweep).
Check the diesel particulate filter (DPF) assembly and check for any exhaust leaks, cracks, signs of melting or excessive deposits. Check the diesel oxidation catalyst (DOC) filter assembly and check for any exhaust leaks. Check the exhaust brake valve for full functionality. Check for any excessive ash accumulation in the DPF filter assembly.CM871 High DOC temp during regen - tariqzai - 04-12-2020. Hi everyone, I have regen issue with my 2009 Volvo with CM871. During Regen instead of DOC temp staying steady and DFP temps going up, this engine shows DPF outlet temp staying steady while DPF intake and DOC temps keep going up (1000+). I have this truck for 3 years and every forced ...
1 NUMBER: 2 ATS 07 S.M. REF.: Listed in Table 1 EN During regen the temp doesn't get over 305. I thought it had to hit over 500 to kick on injector 7. ... We removed the DPF and DOC and got them baked and blew out. ... Constant regens. Two obd codes. Inlet trap pressure and particulate trap 1 ... 2015年2月2日 ... I replaced the DOC inlet anIt's still in regen mode, but the current step After cleaning the doc it was reinstalled on the truck, reset doc/dpf counters. Performed manual stationary regen, the truck kicks up to 1200-1300 to start regen, the turbo speed starts at around 42k and turbo actuator 92%, egr valve position consistently stays at 0%, exhaust gas pressure about 140, intake manifold pressure about 12.5.6. Stay relaxed in a pair of jeans and a windbreaker. Grab your favorite pair of jeans, which will keep your outfit comfortably casual. Slide on a breathable top, along with a windbreaker. Pick out a colorful windbreaker for a more dynamic look, or play around with neutral tones if you'd prefer to be subtle. ... inlet temperature sensor. Source: Cummins Quickse 2022年2月16日 ... An engine oil consumption problem will be hard on a DPF. As Otto explained, the additives in engine oil cannot be oxidized away during a regen, ...May 5, 2021 · The DPF thermal regeneration began at the experimental time of about 30 s, from which the target regeneration temperature and the DPF-inlet temperature started to increase gradually. As soon as the DPF-inlet temperature reached the target temperature of 575 °C, the throttle position was quickly reset and the engine dropped to idle. NOTE: Normal DOC pressure is less than 10 kPThe T2 sensor, at the DOC outlet, providesRegen Temperature- Out Of Range Low Table 1. SPN 3 Jan 18, 2020 · Mack MP8 regen issues. 2012 CXU613 with 2012 fault codes so it's not a 2013. Truck arrived at the shop at the beginning of the week. Soot load was level 5. performed a parked regen. DOC inlet temp was bias. DPF outlet temp stayed above inlet temp during regen. Posts: 28. Joined: Jul 2016. CM871 High DOC temp during regen. Hi eve 1 12-12-2015, 07:37 AM. cm871 low DOC temp won't reg to clear last code. Prostar ISX CM871 low DOC temp won't regen to clear last code. New turbo. New DOC. Cleaned DPF. Remove EGR and cleaned, no exhaust leaks. Engine temp 200 drg. Fan cycles.Engine Speed 1100 rpm (1275 rpm during first 12 minutes of regen then 1100 rpm for fuelmap ending in ZGS 999) Turbo Speed 45,000 – 60,000 (turbo is used to create pressure in the DD13 and DD15AT only) Fuel Cut Off Valve 100% (once DOC inlet temp reaches 536° F) Engine Torque Around 5% Actual Torque Load 15 – 18% (greater than 20% may ... DOC is likely fuckered, you can never really visually see i[The AFI wont kick in tell the DOC and DPF inlet 120–pin MCM connector and the Turbo Compressor Inlet, DOC I 11. After the low temp ATD regeneration has run for 20 minutes, monitor the DOC outlet temperature sensor reading. Is the DOC outlet temperature sensor reading within 25°C (45°F) of the DOC inlet temperature sensor? a. Yes; replace the HC doser block. Refer to section "Removal of the Hydrocarbon Doser Block ". Verify repair. b.Oct 6, 2023 · How to spot a failed DOC.You can tell by watching your temperatures during a regen. If your DPF intake is lower then your DPF outlet, and theyre both above 8...