Automatic Engine Start/Stop
Introducing Integral’s AESS – the most advanced locomotive engine idle limiting system available today. AESS intelligently monitors locomotive usage and automatically shuts down the diesel engine during extended periods of inactivity. This not only delivers significant fuel savings and improved profit margins but also creates a quieter operating environment while reducing harmful NOx, particulate matter, and noise pollution.
The integrated VR module optimizes battery charging and voltage, further minimizing engine use and maximizing efficiency. Its compact and air-cooled design offers flexible installation options.


AESS is compatible with the majority of locomotives in operation and engineered for long-term reliability. Rigorous shock and vibration testing ensures durability, and an optional hardened starter motor guarantees quick engine starts when needed. We provide all necessary connection materials, and AESS can be configured to meet AAR S-5502 (2011) compliance standards.
Experience the benefits of AESS – for your organization, your employees, your community, and the environment.
Learn more about AESS benefits from the EPA.