Tuning - Contrôle Dynamique de la RGÉ et du Bas Régime - OttoStadt MotorWerks
ECU Tuning
Tuning d’ECU
septembre 24, 2016
Spécial sur le remplacement de courroie de distribution
septembre 24, 2016

Tuning – Contrôle Dynamique de la RGÉ et du Bas Régime

Dynamic EGR & Idle

OttoStadt Service

We have seen European industrial TDI engines with a fixed idling (stationary / “idle”) from 1250 rev / min. (RPM) and some of our clients are curious if it is possible to increase the engine idle speed to possibly reduce engine warm-up period. However, they do not want to consume more fuel by having an idling always high, especially if the engine is already warmed. So be up to our low speed Changing Dynamics (Dynamic Idle Tune):

The idle speed will automatically return to its default value (“stock” or the manufacturer) when about 12 minutes have elapsed after start, regardless of the coolant temperature.

If the vehicle starts with a coolant temperature that is greater than or equal to 60 degrees Celsius (140 degrees Fahrenheit), the idling speed is immediately adjusted to the value of the manufacturer.

Here are some examples:

  • The series hybrid vehicle (Serial Hybrid) 1.4L TDI Cornell University – Starts at 1000 RPM and increases its speed to idle, once reheated at 1500 RPM permanently. This is the optimal diet for charging batteries. The regime of 1000 RPM at startup prevents premature wear that could occur if a cold engine would start with a diet of 1500 RPM. A similar configuration was used in Alaska in a drilling machine fed to a TDI.
  • A diet slowed the fixed 1100 RPM on a highly modified with renforcis TDI engine mounts. This reduces the vibration of the vehicle at a speed to idle. An idle speed increased to 1200 RPM was also applied when the coolant temperature is low in order to warm up the engine of a potentially faster way.

Dynamic Control of Emission Gas Recirculation (EGR and EGR Dynamic Control)

This modification has been used for over a year without problem. It is optionally available in custom tuning at an additional cost on the price of a regular tuning (about $ 50 to $ 100 more). Other features are also available in custom tuning, such as the Dynamic Control of Emission Gas Recirculation (EGR and EGR Dynamic Control), Brake patch with left foot, duration of the glow plug and change of force .

Background:

@ Mark Malone stopped recirculation permanently emission gas for as long as the ECU could manage in his TDI 2006. He immediately noticed a difference in winter temperatures of 8 degrees Celsius / 46 degrees Fahrenheit.

  • With the EGR off from the start, its engine dramatically took longer to warm up. A cold engine is bad for durability and fuel economy.
  • He lost  heat of the cooler when he was stopped at intersections because the heat from the exhaust system was not recycled. Even if the temperature of the cooler was optimal Celsiuc 90 degrees (194 degrees Fahrenheit), he could see his hand down suddenly temperature lower than 40 degrees Celsius (104 degrees Fahrenheit) every time he tried to take the heat its engine for comfort inside the vehicle.

Once the EGR settings were reset to their original values, the TDI could keep its heat with much less effort. It also benefited from better fuel economy.

Some people have reported that the suppression of EGR made them benefit from better fuel economy over short distances, as well as long distances. Here is an example from the results of an owner of a 1.9L TDI BEW PD 2005 in Los Angeles:

Mixture City / Highway:
Any origin (All Stock): 5.6L / 100KM (42 mpg)
Origin, EGR OFF: 6.92L / 100KM (34 mpg)
Modified, EGR OFF: 6.72L / 100KM (35 mpg)
Modified, EGR ON : 5.47L / 100KM (43mpg)

Highway:
Any Origin: 5.11L / 100KM (46 mpg) (trip to Las Vegas)
Origin, EGR OFF: 5.34L / 100KM (44 mpg) (Travel in San Francisco)
Modified, EGR OFF: 5.01L / 100KM (47 mpg ) (Travel in Seattle)

He later relocated its EGR components and fuel economy is back to normal.

Mark receives requests every week from people who want to suppress their EGR completely so he decided to develop the change of the dynamic control of the EGR can be an interesting alternative for the following reasons:

Reduced wear

Cold engines tend to wear more quickly and this is accentuated when removing the EGR is applied given the slower engine warm-up time. Even if you live in a warm climate, a little more added every day wear will appear over time.

Mercedes Benz also documented the motor increased wear caused by the EGR (with abrasion of soot in the engine), and minimizing the EGR when the engine is hot (the EGR is minimized for the majority of the time that the motor rolls), this further reduces the overall engine wear.

Optimum fuel economy

Cold diesel engines have a lot of “blow-by” (hot gases that burn the oil film) and once the engine is warm, the latter more seals resulting in better fuel economy. By reducing the warm-up time of your engine using the EGR, you get a faster fuel economy every time you take your vehicle.

Emissions

The emissions from a cold engine is praticulièrement dirty. The normal operation of the EGR when préchauffaque can significantly reduce your annual emissions compared to a complete suppression of EGR.

Protection against motor runaway

If a turbo oil flowing admission (intake) of a vehicle with suppressed EGR, the engine may continue to ride by himself. Indeed, turn off the engine using the ignition key will not turn off the engine because it will continue to burn oil by itself. He will continue to rotate at high speed until a potential failure occurs, or until you change gears for speed and you slam on the brakes to choke the engine. With the right timing, you can probably save the engine. Otherwise you have no chance, especially if you have an automatic transmission.

The EGR has a valve that can block the entry of air into the intake when you turn the key to OFF, eliminating the phenomenon of the oil that keeps burning and also prevents engine overspeed .

Judgments of softer engine

This is perhaps not too much to some, but the engine will shake noticeably When off, if the intake valves are removed. Whichever is the EGR valve (especially for ALH TDI that have MFIs) will provide smooth engine stops.

Netherlands softer regime

Some customers have reported that the sweetness in low speed with the change of the dynamic EGR compared to the original value of the vehicle was much larger. If your TDI has small occasional misfire at low revs, while the dynamics EGR can reduce or even eliminate this problem.

Improved performance

Some customers still have their original performance modification noticed a slight improvement in response time at low speed, especially on the starting line. IT should be noted that these observations were made when the only change to their vehicles was the dynamic EGR.

Admission cleaner

With the change in the dynamic EGR, the EGR is enabled only when the engine preheating short period. She is minimized for the rest of the operation of your vehicle. Your admission (intake) will be free from soot accumulation for much longer, or even the entire life of your vehicle.

This modification has been used for over a year without problem. It is optionally available in custom tuning at an additional cost on the price of a regular tuning (about $ 50 to $ 100 more). Other features are also available in custom tuning, such as the Dynamic Control of Emission Gas Recirculation (EGR and EGR Dynamic Control), Brake patch with left foot, duration of the glow plug and change of force.