Infiniti vct engine




Infiniti vct engine

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  • The world’s first production-ready variable compression ratio engine. INFINITI’s new VC-Turbo (Variable Compression Turbo) is the world’s first production-ready variable compression ratio engine. Roland Krueger, president of INFINITI Motor Company, commented: "The pioneering.

    Infiniti's new turbo gasoline engine can change its compression between and , offering diesel power and efficiency without the.

    Infiniti's newest engine is an engineering marvel. The VC-T engine (for "variable compression, turbocharged") can adjust its compression ratio.

    Infiniti vct engine

    Infiniti vct engine

    The ingenuity of VC-Turbo engine technology lies in its ability to transform itself and seamlessly raise or lower the height the pistons reach. It doesn't care what the fuel is Having trouble reading this image? This VCR engine with more optimal configuration was tested in Russia 10 years ago.

    Infiniti vct engine

    Infiniti vct engine

    Infiniti vct engine

    Infiniti vct engine

    Infiniti vct engine

    VC-Turbo Engine Technology | Infiniti USA

    Infiniti's new variable-compression engine can change the stroke length of the pistons. When the next-generation Infiniti QX50 crossover arrives next year as a model, it will be powered by a 2. Under development at Nissan for 20 years, the Variable Compression — Turbo -- VC-T engine -- has a device that changes the distance the pistons travel in their cylinders by as much as 6 mm, or about a quarter of an inch.

    It's an idea that automakers, such as Saab , and engine developers, including AVL, have tried to perfect over the years. Varying the compression ratio has the potential to offer dramatic improvements in power and efficiency. The VC-T engine is rated at hp and pound-feet of torque. Kiga says the QX50 will reach 60 mph almost one second faster than its four-cylinder competitors.

    Infiniti vct engine

    Infiniti last week allowed a few reporters to drive early pilot-build QX50s at the company's test trackhere. The VC-T's power and refinement were impressive. The technology works in such a manner to make it invisible to the driver. There are no buttons to press, no switches to turn and no strange noises, vibrations or sounds -- just smooth, abundant power and a pleasing, performance-tinged growl from under the hood.

    It's a kind of thermodynamics holy grail in the auto industry. Using the heat of The pistons in all of today's automotive internal combustion engines travel the same distance up and down in the cylinder, regardless of speed and vehicle load. The pistons are connected to rods that are mounted to the crankshaft. The engine's compression ratio is fixed and is determined by the amount of space above the pistons when they are at the top of their travel.

    Infiniti vct engine

    The smaller the space above the pistons, the higher the compression ratio and the greater the engine's power output. The Infiniti engine's layout is the first major change to the system in more than a century. The pistons in the VC-T engine are connected to rods that are attached to one end of an elliptic device Nissan calls a multilink.

    The multilink is mounted on the crankshaft where the connecting rods normally go. The other end of the multilink has a short rod that is connected to a shaft. An electrically controlled actuator twists the shaft, causing the multilink to tilt up or down slightly. When the end of the multilink closest to the piston is tilted up, the piston travels to the top of the cylinder. That is high-compression mode, When the multilink tilts down, the piston's travel in the cylinder stops before it reaches the top.

    This lowers the compression ratio to 8. The turbocharger pressurizes each cylinder with a denser mixture of fuel and air, which increases power. They have to dial down the compression to make everyone happy. Infiniti's product lineup will be leaner than usual this winter as Nissan's premium brand prepares for two new crossovers. At the end of August, Infiniti halted production of two of its core Kiga said Nissan has long known that its multilink mechanical system of varying piston travel would not just work but also be robust enough for a production engine.

    Infiniti vct engine

    The reason for the year gestation is that engine-control technology was not yet advanced enough to manage the complex system. The engine uses nearly all the advanced technologies found in today's production engines. In addition to the turbocharger, the VC-T has both port and direct fuel injection, variable valve timing and a cooling system with four circuits. All of these systems provide inputs to the engine's computer, which runs a fast-spinning electric motor that operates the actuator arm that changes the piston travel.

    The VC-T engine, Kiga says, is about 10 percent more expensive to produce than a regular 2. And although the VC-T has more moving parts than other turbocharged, four-cylinder engines, Kiga says it produces less friction. One reason is because the piston travels straight up and down in the cylinder, eliminating side forces that cause friction.

    Nissan VC-Turbo engine optimizes power and efficiency



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