Start/Stop Functionality Important: The presented proposal does not cover all the diversity of vehicle manufacturer implementations. An adaptation to each application will be required. A carefully revision of your vehicle documentation is advised. The START/STOP signal has been implemented as a low-side transistor - this means that, when the signal is active, the associated pin XG3-H1 is internally grounded (conducting condition). Otherwise, the pin is in high-impedance condition (blocking condition). Concept This function is beneficial to improve the refrigeration performance during long periods of engine stops due to vehicle START/STOP activation (eg.
Traffic jam, urban distribution with high density of traffic lights etc.) The Gateway Control Module (GCM) has a digital output (START/STOP signal) that indicates that the refrigeration unit demands electric power from the alternator. The START/STOP signal can be used to inhibit the start/stop function of the vehicle allowing to: Maintain the engine running despite the vehicle engine stop conditions are met (Typically the vehicle is stopped, gear not engaged etc.) Activate the engine start. All the safety precautions have to be considered by the OEM vehicle manufacturer (seat belt fastened, door closed, battery charged etc.).
and/or Check the vehicle documentation if the vehicle is equipped with such a feature and how to integrate into it’s circuitry. The START/STOP signal is linked to the activation of the Compressor Drive Module (CDM) which is the main consuming load. When the CDM is active the start stop is active. A delay (3s) between the activation of the START/STOP signal and the activation of the Compressor Drive Module (CDM). Note: This is to prevent simultaneously starting the vehicle engine with a load due to high current demand from the CDM. In order to prevent nuisance transients the START/STOP signal is elapsed during a time (3s) when the CDM is disabled by the Gateway controller.
Parameters SSRED and SSFED will need to be adjusted to the customer’s application. TK 56881-18-IM-EN 25