Technology delivers

High displacement and low emissions

Technology Delivers High Displacement and Low Emissions


How does the Cat® 3512E Tier 4 Final engine with Dynamic Gas Blending™ achieve the industry’s best diesel displacement, widest fuel flexibility and greatest greenhouse gas reduction? Through the use of some of the industry’s biggest technology advancements. Here are three of the most important:

In-Cylinder Pressure Sensing (ICPS)

ICPS monitors the pressure inside each cylinder, then precisely adjusts the gas flow to help you achieve the highest levels of diesel displacement — up to 85% — and fuel cost savings. Individually controlling combustion and monitoring pressure in each cylinder also helps you remain Tier 4 Final compliant.

Solenoid-Operated Gas Admission Valves (SOGAVs)

SOGAVs are high-pressure gas-metering devices that control fuel injection through each cylinder. The 3512E Tier 4 Final DGB engine’s electronic control module determines how long each SOGAV is activated to admit the proper amount of gas into each cylinder. By controlling fuel flow into the cylinder precisely, SOGAVs optimize engine performance for high fuel efficiency and low emissions.

Engine Idle Reduction System (EIRS)

Exclusive to Caterpillar and available as an option on the 3512E Tier 4 Final DGB engine, EIRS reduces nonproductive idle time by automatically shutting down the engine between pumping stages. On a 16-unit frac rig fleet, it could decrease idle by 60% — cutting fuel consumption by 3-5% over the course of a year. EIRS also cuts your maintenance costs because your power train accumulates fewer hours.

But that’s not all. Just like its Tier 4 Final diesel equivalent, the 3512E DGB engine also features:

  • High-pressure common-rail fuel system with full electronic injection that’s easy to disassemble and service
  • High-pressure fuel pump that provides best-in-class rail pressure to keep NOx and particulate matter emissions down
  • Single-stage turbochargers that significantly reduce complexity and turn exhaust air into power
  • NOx Reduction System with three Exhaust Gas Recirculation (EGR) coolers and an active heat shield that reduce in-cylinder temperatures to meet emission standards

Find out more about the technology advancements available on the new 3512E Tier 4 Final DGB engine — and how they can help you lower diesel consumption, emissions and operating costs. Get in touch with your local Cat dealer for all the details.




3512E Tier 4 Final Dynamic Gas Blending Engine

Well Service 3512E DGB Engine

The first in the industry certified to U.S. EPA Tier 4 Final, this innovative dual-fuel engine automatically maximizes the amount of gas used to displace diesel. You save big on fuel without giving up the performance of diesel.

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Displacement Vs. Substitution: What’s the Difference?

Displacement Vs. Substitution: What’s the Difference?

The two terms are often used interchangeably — but they shouldn’t be. It pays to understand the difference as you’re calculating your diesel savings.

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Meet the 3512E Dynamic Gas Blending Engine

Cat®  3512E Well Service Engine with Dynamic Gas Blending

No engine on the market can match the 3512E Tier 4 Final with Dynamic Gas Blending for Well Service. Industry-best diesel displacement and fuel flexibility mean you save more without giving up diesel performance.

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Cat® Oil & Gas Ratings Guide

Get the detailed specifications of Cat Oil & Gas solutions needed for your projects right at your fingertips.

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Need help determining which product meets your needs? Your Cat dealer can help you find the right model and ensure that your equipment is operating correctly to help you get the job done.

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