Industrial Engines suit mobile and stationary applications

Four-cycle, 4-cyl Vortec 3000 is available in factory-installed multiport fuel injection gasoline version, and gaseous fuel version with 35 kW genset rating. With MPFI version, fuel injectors are positioned in intake ports of cylinder head and spray fuel on back of intake valves, promoting complete combustion. On high-output gaseous fuel engine, cylinder head combines with 10.5:1 compression ratio, resulting in ratings of 65 and 60 hp at 1,800 rpm with propane and natural gas, respectively.

Factory-Installed MPFI Gasoline and High-Output Gaseous Fuel Versions Now Available

PONTIAC. MICH - GM Powertrain announced enhanced versions of the Vortec 3000 industrial engine for 2006. These versions offer factory-installed multiport fuel injection (MPFI) for a gasoline version and a high-output gaseous fuel version with increased horsepower and torque - and a 35 kW genset rating at 1800 rpm. The engines are designed for a variety of mobile and stationary applications.

The Vortec 3000 engine is the most powerful four-cylinder gasoline engine available in the industrial market. MPFI offers improved fuel economy, reduced emissions, smoother operation and instant starting. With low emissions and smooth performance in a compact package, all versions of the four-cycle, four-cylinder Vortec 3000 deliver the power and torque of many larger-displacement six-cylinder engines.

"The enhancements to the Vortec 3000 reinforce its adaptability and value for any industrial application," said David P. Garrett, engineering manager for GM Powertrain OEM sales.

The addition of factory-installed multiport fuel injection adds convenience to the Vortec 3000 gasoline engine, since the injection system no longer requires OEM installation. And because the injection system promotes hotter, more complete combustion and delivers more precise ignition, idle quality and operational smoothness of the engine are enhanced.

Fuel injectors are positioned in the intake ports of a new cylinder head and spray fuel directly on the back of the intake valves, enhancing power, throttle response and start-up characteristics - a design that promotes more complete combustion and helps reduce emissions. Additional highlights of the Vortec 3000 with MPFI include:

o Returnless-type stainless steel fuel rail with pressure test port

o Automotive-type Multec II injectors

o Upgraded ignition system with new HVS distributor and coil, cam position sensor and 58X crankshaft position sensing system

o Automotive-style emissions-reducing valve seals, PCV valve and crankcase breather

The adaptable, returnless-type fuel rail incorporates a pressure test port, allowing OEMs to customize the fuel system as needed. An OEM-supplied engine control module (ECM) constantly measures the engine's air/fuel ratio and adjusts it continually to optimize performance and emissions.

Automotive-type Multec II fuel injectors are used for their compact size and cold-start performance. These injectors can help reduce maintenance costs, because they are similar to the injectors used in hundreds of thousands of GM passenger vehicles.

A state-of-the-art ignition system is linked to the engine's ECM. A 58X crankshaft position sensing system provides a highly accurate crankshaft position signal to the ECM, which helps provide a more stable spark advance. The crankshaft position sensing system is complemented with a camshaft position sensor and upgraded high-voltage switch distributor and coil that enable the engine's sequential fuel injection. When combined with the OEM's engine control module, this ignition system improves the reliability of the spark as well as the accuracy of the timing. Also, a boss and threaded attachment hole is provided on the engine block for an OEM-supplied knock sensor.

The use of many proven, "off the shelf" automotive components helped reduce development time for the Vortec 3000 with MPFI. The crankshaft sensor is from GM Powertrain's Ecotec four-cylinder engine, while the ignition coil is the same as the Vortec 5700 V-8 engine. Many of the emissions-related components, such as the PCV valve and crankcase breather, are also proven automotive components.

"These parts are already tested, proven and widely available," said Garrett. "Using these parts helps lower the cost of purchasing and maintaining the engine. They also have proven reliability - a quality our customers demand."

Adaptable cylinder head

A version of the new, eight-port cast iron cylinder head used on the Vortec 3000 with MPFI is also used on the new Vortec 3000 high-output gaseous fuel engine without MPFI. The new cylinder head design reduces complexity and allows OEM manufacturers to design and tailor the intake manifold and exhaust system to fit their needs. Large, high-flow inlet ports cast into the head enhance the engine's performance by increasing the volume and velocity of the air/fuel mixture.

With the MPFI version, the head incorporates the injection system's fuel rail and injectors. On the high-output gaseous fuel engine, the new cylinder head combines with a higher 10.5:1 compression ratio to take advantage of the high octane rating of propane (LPG) and natural gas, resulting in horsepower ratings of 65 at 1,800 rpm with propane and 60 at 1,800 rpm with natural gas. More impressive, however, is the high-output engine's 35 kW genset rating - a power-generating rating typically achieved by larger-displacement engines.