4045HF285 Constant Speed

4045HF285 Constant Speed

  • 4045HF285 Constant Speed
  • 4.5L PowerTech™
  • 117 kW (157 hp)


Emissions Certifications

IMO Tier 2 
EPA Tier 3 

General engine data

Number of cylinders4
Displacement-- L (cu in)4.5 (275)
Bore and Stroke-- mm (in)106 x 127 (4.17 x 5.00)
Compression Ratio19.0:1
Engine TypeIn-line, 4-cycle
AspirationTurbocharged and air-to-air aftercooled
Length - mm (in)860 (33.9)
Width-- mm (in)612 (24.1)
Height-- mm (in)1039 (40.9)
Weight, dry - kg (lb)491 (1082)

Performance data range

Heavy Duty - Rated power/Rated speed86 kW (115 hp) @2200 rpm
Heavy Duty - Peak power90 kW (121 hp) @ 2000 rpm
Heavy Duty - Power bulge5% @ 2000 rpm
Heavy Duty - Peak torque480 N·m (354 ft-lb) @1500 rpm
Heavy Duty - Torque rise29%


  • Cross flow head design that provides excellent breathing from a lower cost two-valve cylinder head

  • The HPCR fuel system provides variable common-rail pressure, multiple injections, and higher injection pressures, up to 1600 bar (23,000 psi). It also controls fuel injection timing and provides precise control for the start, duration, and end of the injection.

  • Fixed geometry turbochargers are sized for a specific power range and optimized to provide excellent performance across the entire torque curve. They are also designed to maximize fuel economy between the engine's rated speed and peak torque.

  • An efficient method of cooling intake air to help reduce engine emissions while maintaining low-speed torque, transient response time, and peak torque. It enables an engine to meet emissions regulations with better fuel economy and the lowest installed costs.

  • The HPCR fuel system and engine control unit (ECU) allow for multiple fuel injections. The number of fuel injections, based on speed and load, help contribute to lower combustion temperatures, which reduce the formation of NOx and particulates. The multiple injection strategy also provides an added benefit of noise reduction.

  • PowerTech E engines offer electronically controlled fuel systems with improved cold-start performance, precise engine speed control, torque curve shaping and more. Because these systems have less need for redundant sensors, add-on electronic governors, and shutdown devices - they result in a lower total installed cost.

  • Self-adjusting poly-vee fan drive