Propano

Sistema di alimentazione DI GPL

The industry’s first medium-duty engine system delivering propane fuel at a constant 350-bar.

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System Testing

Stanadyne’s liquid propane gas (LPG) direct injectors and fuel pump with Katech-specified flow circuit were installed on a standard 6.6L GDI engine. Katech conducted a 250-hour performance and durability test, successfully demonstrating direct injection propane is viable alternative fuel delivery option for medium-duty (class 3 to 7) engines.

  • A robust direct injection fuel system using new hardware and software inhibitor technologies to remove vapor lock barriers specific to propane.
  • Stable operation of the engine during hot-start, cold-start, hot-soak, and hot-idle conditions.
  • Delivered LPG fuel at high pressure directly into the engine while mitigating the potential for vapor lock.

MET ALL POWER AND TORQUE METRICS OF THE BASELINE GASOLINE ENGINE

Using direct injection avoids the 20 percent power reduction associated with port fuel injection

Technical Specs

FEATURE SPECIFICATION
Engine Code L8T
Engine Configuration V8
Engine Displacement 6,564 cc
Engine Bore 103.25 mm
Engine Stroke 98 mm
Compression Ratio 10.8:1
Valvetrain Configuration Pushrod OHV with Variable Valve Timing
Valves Per Cylinder 2
Rated Horsepower GM 2500 401 SAE hp @ 5,200 rpm
Rated Horsepower Isuzu Class 3-5 350 SAE hp @ 4,500 rpm
Rated Torque GM 2500 464 SAE lb-ft @ 4,000 rpm
Rated Torque Isuzu Class 3-5 425 SAE lb-ft @ 3,800 rpm

Unique Features

stanadyne-propane-pumps-and-injectors

ELIMINATING VAPOR LOCK

• Katech vapor lock inhibitor hardware and software addresses the design limitations of other LPG direct injection applications.

LPG-SPECIFIC FUEL PUMP

• A modified pump design with a specialized liquid flow path through the pump.

NEW INJECTOR DESIGN

• An injector with an optimal spray pattern to address the unique properties of liquid propane under high pressure.

• Unique spray hole characteristics and targeting to tightly deliver propane.

• Optimal air-fuel mixing for very efficient combustion that generates the same power output as gasoline.

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