The DLG QUALITY SEAL for operating equipment and consumables encompasses products, which are subjected to extensive testing of their value-determining and advertised characteristics.
The tested criteria and the requirements to be fulfilled are specified by independent commissions and are designed – over and above legal requirements – to prove the product’s fitness for purpose, its advertised characteristics and practical requirements.
Testing contents and requirements are developed further by the responsible specialist departments of the DLG e.V. in line with the applicable legislation, as well as with technical and scientific progress.
Successful testing is concluded with the assignment of the DLG QUALITY SEAL. The approved products are then published.
In the course of the development of diesel engines, fuel injection systems have become more and more complex, the injection pressures higher and the injection nozzle holes in the injectors are smaller, more precise and more sensitive to dirt and deposits.
These deposits affect the fuel spray pattern and subsequent combustion becomes less effective. This reduces engine performance and can also lead to a deterioration in exhaust gas behavior and, in the worst case, to engine damage.
A well-controlled industry ‘Test Fuel’ consistent with fuel used in the industry standard CEC F-098 injector coking test was used to provide an efficient and reproducible method of creating injector deposits. Injector coking deposits in market fuel arise from a range of contaminants and oxidation products that occur in fuel manufacturing, shipping, and storage. Dissolved zinc from sources such as galvanized fuel tanks or the release of tiny particles from brass connections combined with oxidation products from bio-diesel can accelerate deposit formation in the nozzle holes in a very short time.
With the HiTEC® 46600 diesel fuel additive deposits on the injector nozzle holes are broken down and new deposits are prevented, reversing the effects on combustion and restoring vehicle performance. Other criteria were not tested.
In the series of tests carried out, both the targeted coking of the injectors by the test fuel and the cleaning effect of HiTEC® 46600 diesel fuel additive could be demonstrated. The performance of the machine measured at the beginning of the series of measurements was reached again after cleaning with HiTEC® 46600.
|DLG QUALITY PROFILE||Cleaning effect confirmed|
|Fuel Efficiency||up to 3.6 % better / 2.1 % ave||(PTO testing)|
|Power Recovery||up to 15.5 % / 12 % ave||(PTO testing)|
|Productivity||up to 20.4 %||(PowerMix testing)|
|AdBlue®/ DEF consumption||up to 24.5 % less||(Transport testing)|
|CO2 reduction||-2.1 % average||(PTO)|
|-12.1 % per hectare||(Powermix full load cycle)|
HiTEC® 46600 diesel performance additive is formulated with Afton’s Greenclean™ detergent technology, developed for performance in industry tests CEC XUD-9, DW-10, IDID and real-world vehicle fuel economy and performance, ensuring injectors are kept clean and free from deposits.
HiTEC® 46600 was dosed into the Test fuel at a concentration of 229 ppm v/v.
The base test fuel was a diesel supplied by Haltermann Carless GmbH. It contained 5 % bio-diesel and was blended specifically so the test fuel was able to meet the following market diesel specifications:
- ASTM D975
- CEC RF-79-07
- CEC RF-05-08
The Test Vehicle
- John Deere 6R 215 Auto Powr TM
- 6.8 l engine with 6 cylinders
- 237 hp (174 kW) max power (ECE-R120) and 22 hp (16 kW) IPM
- Transmission: AutoPowr
- Emission Stage V
The John Deere 6R 215 tractor is often used in contract work. Typical areas of application for this machine include transport and light agriculture through heavy cultivation. Good and comfortable handling is desired throughout.
All the measurements were carried out using DLG’s dedicated off-road / agricultural chassis dyno (Figure 2 and 3). Our chassis dyno ranks among the world’s highest-capacity test stands for measuring vehicle performance, emissions and fuel consumption. Here, tests are conducted on tractors, machinery and other commercial vehicles.
Overview of Test Method – Definition
- Dirty-Up’ was done with engine at full load and engine speed of 1900 rpm running on test fuel and zinc without diesel fuel additive.
- ‘Clean-Up’ was done with engine at full load and engine speed of 1900 rpm running on test fuel and zinc with 229 ppm v/v of HiTEC® 46600 diesel fuel additive
The effect of deposit forming test fuel was examined with 3 different test methods in order to show a relation to use beyond the test bench results.
1. Power and fuel consumption measurement at full engine load using the Power Take Off (PTO) shaft
a) PTO attachments give tractors more versatility and in some cases the PTO is used alone – for example
– Post hole diggers allow owners to dig holes for fence posts, posts for a deck, a pole barn or even plant trees.
– Water pumps are used for dredging ponds and irrigating crops on a farm.
– Wood chipping
b. When measuring the power at the PTO shaft, the entire speed range from rated speed (2100 rpm) down to low idle (900 rpm) was covered.
2. DLG PowerMix
The test cycles performed on the roller dynamometer are based on actual load cycles measured in the field, which over the years have been developed into a practical test recognized by the tractor industry.
For the measurements of the field work based on the DLG PowerMix, the focus was on typical work with high power requirements on the PTO shaft, rotary harrow and mower. Pure traction cycles without PTO were not run-in order to minimize the influence of the tires under high tensile loads.
|Load type||Name of cycle||Driving speed|
|power harrow||100 % Z3K||6||900|
|power harrow||70 % Z4K||6||900|
40 % Z5K
|mowing||100 % Z3M||16||900|
|mowing||70 % Z4M||16||900|
|mowing||40 % Z5M||16||900|
3. DLG Transport Tests
a) Simulating the tractor driving on the road whilst towing a trailer
b) Trips with high trailer loads were used.
|Measurement||PTO Power||PTO Torque||Brake Specific Fuel Consumption||AdBlue® Specific Fuel Consumption|
|Average from 900 rpm |
to 2100 rpm
|+12.4 %||+12.4 %||-2.1 %||-10.9 %|
|Maximum||+15.5 % at 1000 rpm||+15.5 % at 1000 rpm||-3.6 % at 1000 rpm||-26.1 % at 1800 rpm|
The results of the performance measurement can be seen in figures 8 and 9.
|Measurement||Power||Area performance||Consumption per hectare||Consumption costs|
|Diesel||AdBlue ®/ DEF|
|Maximum (cycle power harrow)||+6,9 %||+20,4 %||-11,7 %||-15,1 %||-11,8 %|
|Maximum (cycle mowing)||+6,6 %||+10,3 %||-4,2 %||-9,8 %||-4,3 %|
The cycles carried out with rotary harrow and mower confirm the results of the performance measurement on the PTO shaft. The increases in performance after Clean-Up with HiTEC® 46600 diesel fuel additive allow the tractor to increase its productivity compared to the vehicle with injectors in the ‘Dirty’ state.
During the transport test, the main focus was on transport work with a high load, where the maximum available performance was required. The measuring results are continuously recorded, however only the results of six partial drives are used for the evaluation.
These are highlighted in green in figure 15. These partial drives have different characteristic properties, and therefore requirements for the engine-gearbox coordination.
Table 4: Final Summary – Table of significant claims
|Fuel Efficiency||up to 3.6 % better / 2.1 % ave (PTO testing)|
|Power Recovery||up to 15.5 % / 12 % ave (PTO testing)|
|Productivity||up to 20.4 % (PowerMix testing)|
|AdBlue®/ DEF consumption||up to 24.5 % less (Transport testing)|
|CO2 reduction||-2.1 % average (PTO)|
|-12.1 % per hectare (Powermix full load cycle)|
The test has shown that the additive HiTEC® 46600 from Afton Chemical Limited can c ompletely remove injector deposits created with a fuel meeting CEC RF79-07 reference fuel specification
The performance of the machine was fully restored after 14 operating hours with HiTEC® 46600 diesel fuel additive showing significant
- Increase in engine power and torque at full load measured through the tractors Power-Take-Off (PTO) device
- Reduction in fuel consumption at full load measured through the tractors Power-Take-Off (PTO) device
- Reduction in AdBlue®/ DEF consumption at full load measured through the tractors Power-Take-Off (PTO) device
- Increase in productivity parameters during the PowerMix cycle for harrowing and mowing
- Increase in productivity parameters during the Transportation cycles
- Reduction in CO2 at full load, measured through the tractor Power-Take-Off (PTO) device and during the PowerMix cycle for harrowing and mowing
Afton Chemical Limited
London Road, RG12 2UW Bracknell