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Internal Combustion Engine

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The gasoline engine or internal combustion engine (ICE) is identified by Toyota's designation number 2ZR-FXE. The 2ZR-FXE is an in-line, four-cylinder configuration, 1.8-liter, 16-valve, dual overhead camshaft (DOHC) engine. The engine is equipped with a special design technologies and control that allows for operating on what is called the Atkinson cycle. This engine is fuel injected with a horsepower rated at 98 hp. No accessory drive belts are used on this engine.

The 2ZR-FXE is an in-line, four-cylinder, 1.8-liter, 16-valve, dual overhead camshaft (DOHC) engine. This engine operates on a high-expansion ratio Atkinson cycle. The third generation Prius has a variable valve timing-intelligent (VVT-i) system, electric throttle control system-intelligent (ETCS-i), and liquid-cooled exhaust gas recirculation (EGR) system. In addition, the use of an electric water pump has eliminated the V-ribbed accessory belt. Thus, the vehicle has achieved improved engine performance, quietness, fuel economy, and cleaner emissions.

Atkinson Cycle Valve Timing

Intake Open 29 degrees BTDC to 12 degrees ATDC
  Closed 61 degrees ABDC to 102 degrees ABDC
Exhaust Open 31 degrees BBDC
  Closed 3 degrees ATDC

Internal Combustion Engine Diagram

Specifications (Horse power and Torque values)
1.8-Liter Aluminum DOHC 16-Valve Variable Valve Timing with intelligence (VVT-i)
98 hp @ 5200 rpm (73 kW @ 5200 rpm)
105 lb.-ft. @ 4000 rpm (142 N•m @ 4000 rpm)

© 2012 National Alternative Fuels Training Consortium.

Internal Combustion Engine

Internal Combustion Engine