The data from the Lambda sensor proved to be of particular interest. The chart recorder always showed throttle movement slightly ahead of fuel consumption and Lambda, as the vehicle system reacted to accelerator pedal presses. There are many factors affecting fuelling, such as loading on the engine, atmospheric pressure and ignition timing. The simplest of tests involved the removal of the air filter, which leaned off the mixture. The thermocouple on the air intake also showed the effect of air temperature.
Work continues to fine-tune the engine.
A dynamometer will be useful, as may other sensors such as an air mass flow sensor. This measures both density and air intake volume and ultimately allows calculation of the amount of fuel that requires injecting. The Lambda sensor is an essential part of this control loop. This aspect is part-icularly useful to the vehicle designer and reduces the need for expensive additional hardware. Furthermore, the products versatility allows application to other areas within automotive engineer-ing such as chassis design.