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Discover Toyota's Dynamic Force Engine

Toyota's Dynamic Force Engine adopts high-speed combustion technologies and a variable control system. It also achieves greater thermal efficiency, resulting in high output, due to a reduction in energy loss associated with exhaust and cooling systems, the movement of mechanical parts, and other aspects. As a result, the newly developed 2.0-liter gasoline vehicle and hybrid vehicle engines achieve world-leading thermal efficiencies of 40 percent and 41 percent respectively*. In addition, compared to existing engines, the new engines achieve increased torque at all engine speeds―from low to high rotations―and will comply with expected future exhaust regulations in each country in advance.

*As of February 2018 (Toyota Motor Corporation)

2.0-liter Dynamic Force Engine, a New 2.0-liter Direct-injection, Inline 4-cylinder Gasoline Engine

Maximum thermal efficiency

40% (Conventional Engine)
41% (HV Engine)

2.0-liter Dynamic Force Engine, a New 2.0-liter Direct-injection, Inline 4-cylinder Gasoline Engine

Key technologies / performance

Fuel economy (Thermal efficiency) / Performance
  • High speed combustion technology
  • Long stroke (Stroke/Bore≒1.2)
  • Widen the angle between the intake and exhaust valve
  • High efficiency intake port (Laser cladded valve seat)
  • High Compression Ratio (Conv. 13, HV 14)
  • High energy ignition coil
  • New D-4S
  • Multi-hole direct injector
  • Variable cooling system
  • Motor driven water pump
  • Heated Thermostat
  • Continuous variable-capacity oil pump
  • Low viscosity engine oil
  • Water jacket spacer
  • Piston with Laser Pit Skirt
  • Drilled passage between cylinder bores
High response
  • VVT-iE
  • Small-concave-profile camshaft
  • Compact HLA
  • High strength connecting rod
  • High response intake air control
Low emission
  • Fuel injection control (Multi-injection)
  • Cylinder heads with built-in EGR cooler function
  • New catalyst
  • Exhaust manifold layout change
  • Piston oil jet control
Engine specifications
  New engine New engine for HV
Displacement (cc) 1,986 1,986
Bore x stroke (mm) ?80.5 x 97.6 ?80.5 x 97.6
Compression ratio 13 14
Injection system D-4S D-4S
Max. Power (kW/rpm) 126/6,600 107/6,000
Max. Torque (N・m/rpm) 205/4,800 180/4,400
Emissions control ULEV50 ULEV50

Details of new technologies

Piston with Laser Pit SkirtWorld's first

By subjecting the skirt sliding surface to mirror finishing, reduced friction is realized. On the skirt surface, narrow crosshatch grooves created by lasers improve scuff resistance.

Piston with Laser Pit Skirt

Performance

Cylinder head (for conventional engine vehicles and HVs)

Adopting a laser clad valve seat for the intake valve seat to make the intake port compatible with strong tumble flow (fuel consumption performance) and intake flow rate (output performance).

Cylinder head (for conventional engine vehicles and HVs)

Low fuel consumption

Low fuel consumption

Common architecture of combustion

Common architecture of combustion
Common architecture of combustion
 
 

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