2019 Mercedes-Benz S Class First Photos

Appeared the first official photos of the sedan Mercedes-Benz S-Class new generation. The official premiere of the model will be held on Wednesday, May 15, in the center of Hamburg, where customers are shown aircraft Airbus A380. Overall length of the new items is 5116 mm, width - 1899 mm, height - 1496 mm. Sedan turned 20 millimeters longer, 28 millimeters wider and 25 millimeters lower than the previous S-Class. The size of the wheelbase remains the same - 3035 millimeters. Initially, the model will be offered in three models: S500 (with a 455-horsepower twin-turbo engine V8), S350 BlueTEC (with a three-liter diesel V6 with 258 horsepower), and the S400 Hybrid (based on the 306-strong petrol “Six”). The first of these will allow the machine to dial 0-100 km / h in 4.8 seconds. In a diesel and a hybrid version of S-Class will reach the same mark in 6.8 and 7.2 seconds, respectively. In S-Class will be many new systems of active and passive safety features, including the function of departure warning to the oncoming. In addition, the flagship “Mercedes” will get automatic fragrances, door armrests heated rear seats with massage and 1500-watt audio system Burmester. In total control of all functions will meet the 156 buttons and switches.

Multi-spark ignition and third-generation spray-guided direct fuel injection system with piezo-electric injectors that offer more fuel savings through a homogenous combustion process with a considerably extended characteristic map and fuel-efficient lean-burn technology. Power consumption by auxiliary units has been reduced. These include an optimized water pump with 2nd-generation thermal management, a demand-controlled oil pump, a volume-controlled high-pressure fuel pump and an intelligent generator management system. Spray-guided direct gasoline injection (which Mercedes-Benz was the first car manufacturer to introduce in series production) is now in its third generation. The system pressure is up to 2,901 psi and is variably optimized according to the engine's performance. New piezo-electric injectors allow up to five injections per intake stroke for the best possible mixture formation. The crystalline structure of the piezo-ceramic changes in microseconds under an electric voltage and with the precision of just a few thousandths of a millimeter. The central component of a piezo-electric injector is the piezo-stack, which directly controls the metering needle.

With a response time of just 0.1 milliseconds, the fuel injection can be very sensitively and precisely adjusted to the current load and engine speed, with a beneficial effect on emissions, fuel consumption and combustion noise. In the V6 motor, the multiple injections even in tiny quantities made possible with piezo-electric injection technology were used by Mercedes-Benz engineers to control a wider, usable combustion process with efficient lean-burn operation. The third-generation direct injection system also features rapid multi-spark ignition (MSI). Following the first spark discharge and a brief combustion period, the coil is rapidly recharged and a second spark is discharged. The MSI system enables up to four sparks to be discharged in rapid succession within one millisecond, creating a plasma with a larger spatial expansion than conventional ignition. Controlling this rapid multi-spark ignition enables both the time lapse before the next spark and the combustion duration to be optimally adjusted. This provides versatility in optimizing the center of combustion and improving residual gas compatibility, especially during stratified charge operation. Fuel consumption can be reduced by roughly two percent this way.

Fuel savings of up to 4 percent are possible alone by the use of piezo-electric injection technology in combination with multi-spark ignition, depending on the driving cycle. Mercedes-Benz engineers modified the variable, hydraulic vane-type camshaft adjusters for the intake and exhaust sides by using the basic architecture of the preceding engine. These now have a larger adjustment range of 40 degrees with reference to the crankshaft. Engineers were also able to improve the functionality, achieving a 35 percent greater adjustment speed and adjustability at an oil pressure as low as 5.8 psi. Despite the improved performance, this new component features significantly smaller dimensions and low weight. For this reason the installation space on the longitudinal and vertical axes of the engine was able to be reduced by around 0.6 inches. The extreme compactness of the camshaft adjusters was achieved by the new, two-stage chain drive. A primary chain drives two secondary chains - one per cylinder bank -via an intermediate gear. All three chains can be individually adjusted via a chain tensioner. This results in low tensioning forces and low chain dynamics, ensuring consistent timing and outstanding acoustic properties, with friction reduced even further.

In short, the new chain drive is compact and provides low-noise operation. The exhaust systems for the SLK were developed to meet the ULEV exhaust emission standards as well as noise emission standards. The exhaust system for the 4-cylinder engine consists of a firewall catalytic converter, a center muffler and two rear mufflers. The emission control system for the V6 gasoline engine has a firewall catalytic converter for the right and left cylinder banks. The exhaust gases then flow into storage-type NOx catalytic converters. These are followed by a twin-pipe center muffler and rear mufflers designed as reflection/absorption mufflers on the left and right and rounded-off by two exhaust tailpipes. The four-cylinder engine for the new SLK250 follows the downsizing principle with the reduced cubic capacity compensated by homogeneous direct injection and turbocharging. This leads to advantages such as lower weight and reduced engine friction. A smaller engine also moves the operating range of the combustion process towards more favorable conditions with consequent fuel consumption improvements. The direct injection system of the four-cylinder engine has an injection pressure of up to 2,031 psi.