the cpbc diagnostics used for optimizing the combustion process and protecting the engine are extracted from every cylinder and used as feedback in closed loop control for the actuators like diesel and gas injectors. therefore the ecu requires a substantial amount of computing power to process the data coming from the cps. this is delivered by the arenared cpbc chip. combustion concepts like rcci are unstable and can only be run stable by using cpbc with high speed feedback. the arenared chip is able to run more than 1000 cpbc processes in parallel. the arenared cpbc chip provides an enormous amount of control possibilities. this makes it possible to integrate functionalities from other devices, when saving a controller is desired to reduce cost. integrations could be:
in order to provide demonstrations for new or other customers, the ecu is built as an engine laboratory tool. it has 16 peak hold injector drivers and is capable to drive any kind of injector, solenoid or piezo injector. the ecu is fitted with extra in- and outputs for additional peripherals. the ecu can also be used as an engine data acquisition system.
the engine software is written in matlab/simulink with a shell of c#. the arenared cpbc chip provides all required, such as:
the arenared cpbc chip can be customized and delivered as a product on its own.
arenared’s software can be bought as a single product on its own.
arenared’s combustion pressure sensor (cps) is a fiber optical sensor that measures the light intensity reflected by a membrane exposed to the pressure. the uniquely designed fixation of the fibers and heat conductivity of the sensor membrane and body ensures the exceptional durability, even with (undesirable) knocking events and even with constant heavy knocking. commonly used fiber optical sensors require a heatshield that in time clog with soot and cause a sensor fail. because of the unique design the arenared cps does not require a heat shield for protecting the sensor.
a drawback of the fiber optical sensor especially without a heat shield, is that the membrane becomes hotter on the outside than on the inside, the thermal expansion of the outside of the membrane causes a displacement of the membrane that will be seen as an pressure change, which is known as thermal shock error. the arenared cps therefore has two locations to measure the displacement of the membrane and this way arenared is able to eliminate the thermal shock error. this double measurement is patented by arenared. using the double measurement, the arenared cps gives information about the combustion temperature as well, which can be used to optimize engine efficiency by reducing heat loss.
beside the combustion temperature delivered from the arenared cps, the combustion temperature is also derived from the combustion pressure and the cylinder volume. this is a major arenared control strategy and also patented by arenared. the emissions are optimized by keeping the combustion temperature below the thermal nox formation temperature and above the ch4 oxidation limit (patented by arenared).
the arenared docat 3500ar cps has the same membrane and electronics as the m5 version. the fibers are placed in a separate unit which is in the arenared nozzle in the injector. arenared is able to produce diesel nozzles with an eccentric placed needle, which makes it possible to integrate the sensor within small diesel injectors used in the smallest personal cars.
the arenared fiber optical combustion pressure sensor can be built in any diesel injector, gas injector or glowplug.
the arenared fiber optical combustion pressure sensor is deliverable as a m5 x 0,5 body.
the diesel injectors for the docat 3500ar retrofit package are designed by arenared and produced in the netherlands under arenared’s supervision by specialized dutch production companies.
special features of the patented arenared diesel electronical unit injector (eui) are:
due to new production methods arenared is able to produce:
the double wall arenared gas injector is lloyds approved and can be supplied as oem or retrofit package which prevents the need for extra ventilation in the engine room. the double walled lloyds gas safe approved gas injector is patented.
design specifications gas injector:
arenared’s ecu is developed to act as an engine lab data acquisition system. there are analog in- and outputs reserved for connecting additional research sensors and actuators.
with the arenared ecu you can turn every cylinder into an individual engine research lab to be used for research or educational purposes. through the software which is especially designed for research you have full control over all the control parameters.