Validação das Interfaces entre o Sistema de Partida Auxiliar e o Módulo de Controle Motor utilizando o Hardware in the Loop

Abstract

Hardware in the Loop (HiL) testing is a simulation technique where the PCM (Powertrain Control Modu le) is connected to a test bench. The engine behavior is emulat ed through an engine model inside the HiL virtual environment. This technique avoids vehicle testing and allows to run thousands of scenarios at low cost and reduced timing. The new Brazilian PROCONVE L7 regulation imposes NMOG (Non-Methane Organic Gas es) emissions limit and unburned ethanol discount will n o t b e allowed. It is a recognized challenge to meet NMOG emissions limit when running hydrated ethanol (E100 fu el) in port fuel injection engines. To overcome this , an Auxiliary Cold Start System (ACSS) can be applied to heat the E100 prior to cranking and during engine warmup, which improves combustion quality. The interface between ACSS and PCM requires functional validation. This s tud y proposes to improve the HiL environment by creatin g t h e ACSS model, which needs to be integrated with the current model-based system. The ACSS model development will be based on the analysis of requirements, architecture design and functional logic definition. This paper will evaluate the portion of the PCM software wh ich con tro ls the ACSS, verifying software responses for each error state, message synchronization and heating cycles.