An update from JESMB.
Mercedes S-Class mild hybrid ISG diesel is coming
Presumably at the beginning of 2022 Mercedes will bring the recently presented new S-Class with a mild hybrid diesel
In addition to the S 580e plug-in hybrid, Mercedes also offers mildly electrified S-Class. These are the S 450 and S 500 with 48 volt ISG with 21 hp. The integrated starter generator - ISG for short - is located between the engine (located on the crankshaft) and the gearbox. It not only replaces the belt-driven starter, but is also suitable for boosting, recuperation and sailing, thereby reducing consumption.
OM654M is followed by OM656M
After
the order approval for the E 300d 4matic and CLS 300d 4matic with OM654M (also with 48 volt ISG) was granted on January 19, 2021, the second generation ISG with 20 PS is now also coming into the S-Class W223 with the OM656M R6 diesel. The 2nd generation is integrated even more directly into the 9G-Tronic NAG3 housing and can therefore be more easily combined with different motors.
Compared to the 48 volt RSG (belt starter generator), which only have 14 hp and still sit where the starter was, the ISG can boost over the entire speed range and support the combustion engine. With the RSG, this only works up to around 2,500 rpm (e.g. with the M264 4-cylinder petrol engine in the C-Class, E-Class and GLC).
The ISG is therefore the perfect technical solution for the Mercedes S-Class.
Mercedes still has to be careful with CO2 fleet consumption. Although the EU's CO2 targets have been achieved in 2020, this will be a little more difficult in 2021/2022, as some special bonuses will be eliminated or melted down. The phase-in credit will no longer apply in 2021 (5% of the vehicles with the highest CO2 emissions were not assessed). The super credits (electric and plug-in hybrid vehicles) are no longer weighted with a factor of 2 for approval within the EU, but with a factor of 1.67 in 2021 and 1.33 in 2022. That is why Mercedes continues to push the tube when developing environmentally friendly drive trains. The OM656 receives a similar revision as the OM654M. The OM656 R6 Diesel is equipped with the 48 volt ISG with 20 hp.
Mercedes OM656 2.9 liter R6 diesel
The main features of the OM656M will be:
- 2,700 bar (instead of 2,500 bar) injection pressure
- In addition to the SCR catalyst close to the engine to avoid nitrogen oxides, a second SCR catalyst, also with AdBlue injection, is installed in the underbody of the S-Class
- 2nd generation 48 volt ISG with 20 PS and 180 NM
- Performance values slightly increased compared to the current OM656 350d and 400d engines
Vermutlich Anfang 2022 bringt Mercedes die kürzlich vorgestellte neue S-Klasse W223 mit einem Mildhybrid Diesel OM656M R6
jesmb.de