The latest advances in electronic engine and fuel-injection system design from Caterpillar Engine Division are showcased on its new 3196 and 3456 engines.

The 3196 engine (shown) is an inline, six-cylinder unit displacing 12 liters. Rated engine output is 276-373 kW (370-500 hp) at 1800-2100 rpm. The 940-kg (2070-lb) engine's high torque rise and compact dimensions make it suitable for installation in rock drills, off-highway mobile machines, and other industrial applications. The 3456 has rated power of 317-492 kW (425-660 hp) at 1800-2100 rpm. In addition to ensuring optimum performance and fuel economy, its electronic controls provide the operator with key diagnostic and fault-finding information. Applications for this engine include crushers, drills, and cranes.

The 3196 and 3456 use a proven fuel system incorporating an in-head camshaft with adjustment-free valve bridges and Mechanically actuated, Electronically controlled Unit Injectors (MEUI). Designed to cope with high fuel-injection pressures, the MEUI system provides improved performance combined with reduced fuel consumption.

The MEUI fuel system is governed by an advanced electronic engine management system developed by Caterpillar. The ECM is linked to a series of sensors within the engine that provide the E-Series Cat engines with an "artificial intelligence." It contains a Personality Module that stores the customer-supplied operating maps that define output and torque curves. The ECM continuously monitors key engine parameters including fuel, engine oil, and coolant temperature, along with oil, atmospheric, and injection actuation pressures. The electronic intelligence provides levels of performance, power, economy, and flexibility beyond traditional mechanically controlled engines. It also ensures that peak performance is maintained throughout the engine's entire operating range.