Measurement of Real-Time Lubricant Oil Consumption
Using the Da Vinci DALOC™ Analyzer
Da Vinci Emissions, Ltd.
By Dr. Kent Froelund, CEO & President
--Your Partner for Perfecting Oil Emissions--
Outline
1. Motivation for oil consumption reduction
2. Description of the DALOC™ measurement system
3. Sample data:
•
•
•
•
Real-time steady-state engine oil consumption data
Real-time steady-state cylinder oil consumption data
Real-time transient engine oil consumption data
Power-cylinder, crankcase ventilation, and turbocharger oil
consumption
4. Conclusions
Motivation for Reducing Oil Consumption – To
Reduce Exhaust Treatment System Cost and Size
Oil Consuming
Engine Components
Soot and Ash Loading of
Catalyzed-DPF
Mission Statement
We offer specialized testing equipment for
engine R&D testing, including:
1.
2.
3.
4.
Real-Time Engine Oil Consumption measurement system (DALOC™)
Real-Time Cylinder Sampling Train (DAST™)
Real-Time Lubricant Oil Consumption measurement of Turbochargers on
Engines (DALOC-ENG-TC™) and on Gas Stands (DALOC-GAS-TC™)
Real-Time Fuel-In-Oil measurement system (DAFIO™)
We strive to excel in flexibility, customer support,
and technical competence in the areas
we choose to compete in
Customer Reference
“The Da Vinci DALOC system is an easy-to-use and powerful tool for
performing real-time engine oil consumption measurements. The
sensitivity and accuracy of this instrument is outstanding providing
unmatched diagnostic capability during engine development. The
instrument is well packaged and leaves the impression of a mature
product.”
Customer testament by:
Dr. Michael Wahl, VP Research
Achates Power
San Diego, California
Email: [email protected]
http://www.achatespower.com/about.html
DALOC Analyzer
DALOC Working Principle
 Theory of Operation:
 Mass-balance of Sulfur Over
Engine Control Volume
 Testing assumptions:
 Ultra-low-sulfur fuel (<3 ppm/w)
 Stock lubricant (~4,000 ppm/w)
 Stock engine
 Sampling
 Sample Conditioning:
 Add O2
 Convert sulfur-species to SO2
 Eliminate H2O
 Eliminate NO
 Detection by UVF
 Ultra-Violet excitation
 Fluorescence detection
 Data processing
m OC 




m fuel S exh  S  fuel  m air  S exh  S air
S 
oil
 S exh

Repeatability
Achates Power Opposing-Piston Diesel Engine MY2011
Real-Time Steady-State OC - Diesel
Diesel Truck Engine MY 2007
140
24_100
Baseline Rings
24_75
120
24_50
24_MOT
Oil Consumption (g/hr)
100
80
60
40
20
0
0
60
120
180
240
300
Time (Seconds)
Real-time steady-state oil consumption useful in that it
points at the root cause for oil consumption issues!
Real-Time Transient OC - Gasoline
Published data from 3.8 L Gasoline Engine
120
Cycle #5
Cycle #6
Baseline Rings
80
60
40
120
20
100
Cycle #4
0
0
900
1800
Time (s)
2700
Oil Consumption (g/hr)
Oil Consumption (g/hr)
Cycle #4
100
Cycle #5
Cycle #6
Low-Tension Rings
80
60
40
20
0
0
900
1800
Time (s)
5-10 Transient cycles generated in a few hours
Repeatability of transient data noteworthy!
2700
Impact of OCR Ring-Tension
Diesel Truck Engine MY2007
0:00
0:03
0:06
0:09
0:12
0:15
0:18
0:21
0:24
Time (hr:min)
0:27
0:30
0:33
0:36
0:39
0:42
Higher OCR Tension
Cylinder Oil Consumption (g/hr)
Cylinder Oil Consumption (g/hr)
Baseline OCR Tension
0:00
0:03
0:06
0:09
0:12
0:15
0:18
0:21
0:24
Time (hr:min)
Higher tension oil control ring (OCR) dangerous approach – higher
fuel consumption, wear rate, and oil consumption can result!
0:27
Real-Time Cylinder Oil Consumption
Three MY2007 Truck Engines, One MY2000 Gasoline Engine
CYL-OC @ 1,800 rpm/100% load
C7 Engine at 2400 rpm/100% load
25
Cylinder Oil Consumption (g/hr)
Cylinder Oil Consumption (g/hr)
30
25
20
15
10
5
15
10
5
0
0
0:03:00 0:06:00 0:09:00 0:12:00 0:15:00 0:18:00 0:21:00 0:24:00 0:27:00 0:30:00 0:33:00 0:36:00
Time (min:sec)
1
2
3
4
0
120
240
360
480
600
5
720
840
Time (seconds)
0:00:0 0:03:0 0:06:0 0:09:0 0:12:0 0:15:0 0:18:0 0:21:0 0:24:0 0:27:0 0:30:0 0:33:0 0:36:0 0:39:0 0:42:0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
CYL#
6
Real-Time CYL-OC (g/hr-cyl)
CYL#
20
960
1080
1200
1320
1440
1
2
Time (hr:min:sec)
3
4
5
6
Real-Time Transient OC - Diesel
SO2 Concentration During Tier 4 US EPA Non-Road Transient Cycle
0.500
0.400
0.300
0.200
0.100
0.000
1201802403003604204805406006607207808409009601020
1080
1140
1200
1260
1320
1380
1440
Design Component Group Oil Consumption
Two MY2007 Truck Engines
CCV-OC
TC-OC
PRL-OC
Oil Consumption (g/hr)
Valve Seals
Crankcase
Turbocharger
Powercylinder
Operating Condition
CCV-OC
TC-OC
Oil Consumption
RPL-OC
Operating Condition
Conclusions
1. Motivation for oil consumption reduction
 HC, CO, PM, PM size distribution, exhaust treatment system
2. Description of the DALOC™ measurement technology
 Sulfur-trace and UVF detection
 Da Vinci DALOC services and sales on three continents
 ~10 analyzers in the field, 50 customers, USD 10M revenue
3. Sample data:




Real-time steady-state engine oil consumption data
Real-time transient engine oil consumption data
Real-time steady-state cylinder oil consumption data
Power-cylinder, crankcase ventilation, and turbocharger oil
consumption
4. Thank you for your attention!

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