2012 Toyota Camry

The all-new Camry Hybrid debuts a highly revised version of the brand's Hybrid Synergy Drive powertrain, including a new 2.5-liter four-cylinder engine. The 2012 Camry Hybrid LE, with EPA-estimated 43 mpg city/39 mpg highway/41 mpg combined, yields a more-than-30 percent boost in fuel economy in the EPA city and combined driving cycles, compared to the previous generation, thanks largely to the new hybrid powertrain, but also due to lighter vehicle weight and optimized aerodynamics. Through its unique transaxle, the Hybrid Synergy Drive system combines output from the four-cylinder engine with a small high-torque electric motor. The system produces a combined 200 horsepower and varies power between the gas engine and electric motor, or combines both, as needed.

The new 2.5-liter engine, like the 2.4-liter it replaces, uses the Atkinson cycle (delayed intake-valve closing for an expansion ratio greater than compression ratio) to achieve maximum efficiency. The Variable Valve Timing with intelligence (VVT-i) system on the intake camshaft enhances torque, which is greater than with the previous engine. An electric water pump, a roller-rocker type valvetrain and a variable-output oil pump help to reduce internal friction, boosting economy. A new water-cooled exhaust gas recirculation (EGR) system helps to ensure the lowest possible emissions at all vehicle speeds and helps increase fuel efficiency. By cooling and controlling exhaust gas injected into each cylinder, the system eliminates the need to richen the air-fuel mixture to control cylinder temperatures.

The 2012 Camry Hybrid meets AT-PZEV (Advanced Technology Partial-credit Zero Emissions Vehicle) standards. New sound absorbing materials in the engine compartment, along with more linear control over engine speed, give the 2012 Camry Hybrid a more pleasing sound under acceleration. Because there are situations in which the gas engine in the Toyota Camry Hybrid shuts off, air conditioning and power steering systems are driven electrically. New efficiency measures in the Hybrid Synergy Drive system include reducing internal losses in the transaxle, improving motor-voltage control, and optimizing the regenerative braking. The proven nickel-metal-hydride battery, located in the luggage compartment behind the rear seats, now features enhanced air-cooling. Its more compact size, along with moving the DC/DC converter to the engine compartment, results in a trunk that is 2.1-cubic feet larger than in the previous-generation Camry Hybrid.

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