Caterpillar Announces Three New Tier IV Interim/Stage IIIB Technology Industrial Engines

Mon October 19, 2009 - National Edition
Construction Equipment Guide


Caterpillar Inc. has introduced its Cat C3.4B, C4.4 ACERT and C6.6 ACERT, the three latest additions to the Cat Tier IV Interim/Stage IIIB technology industrial engine line up. The new models cover the horsepower band from 60 to 174 hp (45 to 130 kW) and provide more engine options for original equipment manufacturers (OEMs) of agricultural, construction, material handling and general industrial equipment. All of these engines are available with a wide choice of options which are well-suited for compact and midrange equipment.

The new C3.4B offers power density and compactness suitable for many application requirements. The compact engine provides more power with ratings from 60 to 115 hp (45 to 86 kW) and high torque up to 310 lb.-ft. (420 Nm). It features a common rail fuel injection system, smart waste-gated turbocharger, aftercooler and is electronically controlled.

Complementing the midrange of these engines is the new C4.4 ACERT providing 80 to 174 hp (60 to 130 kW). The 4.4 L, 4-cylinder engine has received a significant upgrade and now provides a 22 percent increase in power to 174 hp (130 kW). Depending on the power required, it is equipped with a single or series turbocharger. The newly designed head, block and common rail fuel system delivers enhanced fuel economy and torque up to 553 lb.-ft. (750 Nm). (The single turbo version is intercooled and provides improved power and torque; the series turbo model delivers extra power density and faster response.) The new platform features a wide range of options and aftertreatment configurations for maximum, reliable productivity and ease of installation, according to the manufacturer.

The new C6.6 ACERT is a 6.6 L platform delivering 120 to 174 hp (89 to 130 kW) and a peak torque of up to 609 lb.-ft. (825 Nm) at low engine speed. The high torque capability and low end response make this a choice for many machines that currently utilize engines more than 175 hp (130 kW).

The addition of the C3.4B, C4.4 ACERT and C6.6 ACERT brings the total Cat Industrial Tier IV Interim/Stage IIIB engine count to 15.

Through extensive Caterpillar application and integration experience, these new engine platforms have optimized fuel consumption to the actual operating cycles of off-highway machines. Compared to existing Tier III/Stage IIIA engines, these new engines produce fuel consumption improvements across the entire horsepower band, according to the manufacturer.

Fuel economy improvements can be subject to application, ratings and operating conditions.

The C3.4B, C4.4 ACERT and C6.6 ACERT will begin production and distribution prior to 2012, the year that Tier IV Interim/Stage IIIB emissions standards take effect for this power category of engines. The C7.1 ACERT and C9.3 ACERT will be available prior to 2011, the year that Tier IV Interim/Stage IIIB emissions standards take effect for this power category of engines.

When completely unveiled, the Cat Tier IV Interim/Stage IIIB industrial engine lineup will include more than 20 models from 11 to 1,200 hp (9 to 895 kW). As with all Cat ACERT Tier IV Interim/Stage IIIB compliant engines, ACERT Technologies are the key enabler to achieve a significant 90 percent reduction of particulate matter (PM) and a 45 percent reduction of oxides of nitrogen (NOx).




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