The Christiani functional motors are mounted on a mobile frame made of
high-strength aluminium profile. Instrument cluster, fuse block, as well as
ignition start switch, emergency stop switch and a component simulation are
installed on the control panel on the front side.
The component simulation is used to display different operating states and
emergency running characteristics. By manipulation of individual sensors, the
reaction of the engine management, e.g. by evaluation of measured value blocks
or error entries, can be visibly traced.
At the lower front panel there is the original OBD interface and the
interface for practice measuring stations. This makes it possible to connect
standard workshop diagnostic systems and practice measuring stations (up to 14
in series). A pull-out shelf for measuring instruments, laptop or work documents
is located below the interface plate.
With the built-in and lockable fault circuit, 24 different electrical faults
can be connected within the engine control system, the voltage supply system,
the fuel injection system and the fuel supply system. The resulting malfunctions
enable the instructor to perform various realistic learning situations.
For troubleshooting, optional practice measuring stations or test boxes with
test adapters for the engine management system are available. With these the
signals and voltage values of all system-relevant parts and components can be
measured or diagnosed. In addition, parallel test adapters can be installed at
the plug connections of the components to which faults can be applied. This
enables the electrical cable connections to be measured without disassembly,
even in places that are difficult to access.
To generate the necessary signals of drive components that are not installed,
the training stand has a residual bus simulation to ensure perfect function and
diagnostic capability without restrictions. Rotating components and assemblies
with high operating temperatures are protected against accidental contact.
All components used for real function are original components of the
respective manufacturers. The superstructures shown are examples of functional
engine training stands manufactured to date.
The new EA288 diesel engine series is also known as the Modular Diesel Kit,
or MDB for short. The modular diesel kit creates a uniform basis for future
in-line diesel engines in the Volkswagen Group which can be used across vehicle
classes. The concept of the modular diesel kit is based on the fact that the
engine's functional units are subdivided into modules. Depending on the
requirements in terms of displacement, power output, emission standard and
vehicle class, the engines can be balanced and, if necessary, configured from
modified unit modules of the basic engine and add-on parts.
The 2.0 TDI engines (85/110/140kW) with Euro 6 emission
The 2.0 TDI engines belong to the EA288 diesel engine series. The different
performance variants are achieved by means of modified engine software and
exhaust gas turbochargers of different sizes. All diesel engines are equipped
with the Selective Catalytic Reduction (SCR) exhaust aftertreatment system and
comply with the EU6 emissions standard.
Exhaust aftertreatment with an SCR system
An effective way to reduce nitrogen oxide emissions is to treat the exhaust
gas with an SCR system. The abbreviation SCR stands for Selective Catalytic
Reduction. This system specifically reduces the nitrogen oxides in the exhaust
gas. The nitrogen oxides (NOx) contained in the exhaust gas react with ammonia
(NH3) to form non-toxic nitrogen (N2) and water (H2O). This chemical process
takes place in a reduction catalytic converter. The ammonia required for the
reduction process is obtained from a urea water solution, the reducing agent
AdBlue®. This takes place under the influence of the heat contained in the
exhaust gas. The reducing agent AdBlue® is carried in an additional tank in the
vehicle and is continuously injected into the exhaust gas stream upstream of the
reduction catalytic converter.
Immediately usable and mobile functional motor incl. error circuit, data
sheets, circuit diagrams and operating instructions