Caterpillar equips every Tier 4 Interim/Stage IIIB engine with ACERT™ technology with an ideal combination of electronic, fuel, air and aftertreatment components, based on engine size, the type of application and the geographic location in which it will work. Applying technologies systematically and strategically optimizes them to meet our customers’ high expectations for productivity, fuel efficiency, reliability and service life. The right technology fine-tuned for the right application results in: Improved fuel efficiency up to five percent improvement in fuel efficiency.

  • Power and performance integrated design boosts power and performance across applications.
  • Reliability through commonality and simplicity of design maximized uptime and reduced cost with world-class support from the cat dealer network.
  • Long life cat durability and long life to overhaul.
  • Minimized impact of service and maintenance on operating costs.
  • Smooth transition to tier 4 final design and modular aftertreatment pave the way for a smooth transition to tier 4 final/stage iv solution. No additional space required..
  • Reduced emissions up to 90 percent reduction in particulate matter (pm) and 50 percent reduction in oxides of nitrogen (nox).

Tier 4 exhaustEngine Electronics

Increased features and connection commonality improve the customer experience and increase quality and reliability. Over Foam wiring harness adds to reliability even in the most demanding applications.

Tier 4 Fuel System System

As a key component of Cat® Tier 4 Technology, injection timing precisely controls the fuel injection process through a series of carefully timed microbursts. This injection timing provides more control of combustion for the cleanest, most efficient fuel burn. To maximize customer value, Caterpillar engineers specified fuel systems based on the power and performance demands for each engine.

High Pressure Common Rail Fuel Systems with full electronic injection improve precision and control that boost performance and reduces soot for the C4.4 ACERT, C6.6 ACERT, C7.1 ACERT and C9.3 ACERT. Advanced MEUI-C injector platforms handle increased injection pressures and more precise fuel rates. These durable injectors enhance responsiveness while controlling soot in the C13 ACERT, C15 ACERT, C18 ACERT, C27 ACERT and C32 ACERT.

Tier 4 air managementAir Management

Cat Tier 4 Interim/Stage IIIB engines feature innovative air-management systems that optimize airflow and enhance power, efficiency and reliability. We apply a range of simple, reliable turbocharging solutions, based on engine size and application. This allows us to match turbo performance to rated output for high productivity, excellent fuel efficiency, long life and low operating costs.