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Variable Camshaft Timing (VCT) is an automobile
Automobile

An automobile or motor car is a wheeled motor vehicle for transportation passengers, which also carries its own car engine or motor. Most definitions of the term specify that automobiles are designed to run primarily on roads, to have seating for one to eight people, to typically have four wheels, and to be constructed principally f...
 variable valve timing
Variable valve timing

Variable valve timing, or VVT, is a generic term for an automobile piston engine technology. VVT allows the lift, duration or timing of the intake or exhaust Poppet valve to be changed while the engine is in operation....
 technology developed by Ford
Ford Motor Company

The Ford Motor Company is an United States multinational corporation and the world's List of automobile manufacturers#World Motor Vehicle Production by Manufacturer based on worldwide vehicle sales, following Toyota, General Motors, and Volkswagen Group....
. It utilizes electronically controlled hydraulic valves that direct engine oil into the camshaft phaser cavity. These oil control solenoids are bolted into the cylinder heads towards the front of the engine near the camshaft phasers. The powertrain control module (PCM) transmits a signal to the solenoids to move a valve spool that regulates the flow of oil to the phaser cavity.






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Variable Camshaft Timing (VCT) is an automobile
Automobile

An automobile or motor car is a wheeled motor vehicle for transportation passengers, which also carries its own car engine or motor. Most definitions of the term specify that automobiles are designed to run primarily on roads, to have seating for one to eight people, to typically have four wheels, and to be constructed principally f...
 variable valve timing
Variable valve timing

Variable valve timing, or VVT, is a generic term for an automobile piston engine technology. VVT allows the lift, duration or timing of the intake or exhaust Poppet valve to be changed while the engine is in operation....
 technology developed by Ford
Ford Motor Company

The Ford Motor Company is an United States multinational corporation and the world's List of automobile manufacturers#World Motor Vehicle Production by Manufacturer based on worldwide vehicle sales, following Toyota, General Motors, and Volkswagen Group....
. It utilizes electronically controlled hydraulic valves that direct engine oil into the camshaft phaser cavity. These oil control solenoids are bolted into the cylinder heads towards the front of the engine near the camshaft phasers. The powertrain control module (PCM) transmits a signal to the solenoids to move a valve spool that regulates the flow of oil to the phaser cavity. The phaser cavity changes the valve timing by either advancing or retarding the camshafts to allow for optimum engine performance, reduced emissions, and increased fuel efficiency.

The VCT system is used in Ford's Triton 5.4L 3-valve V8 engine; the Australian Barra
Ford Barra engine

The Barra engines are a family of Ford Straight-6 engine and V8s assembled by Ford Australia since 2002. The V8s are built in the USA by the Ford Motor Company and are shipped un-assembled to Australia, for assembly at the FPV Factory....
 182 and 240 Inline-6s; Ford's 4.6L 3-valve V8 engine used in the 2006-present Ford Explorer
Ford Explorer

The Ford Explorer is a mid-size sport utility vehicle sold in North America and built by the Ford Motor Company since 1990. It's manufactured in Louisville, Kentucky ....
 and 2005-present Ford Mustang GT; and the 2.0L Zetec Inline-4 used in the 1998-2003 Ford Escort ZX2
Ford Escort (North American)

The Ford Escort is a compact car that was manufactured by the Ford Motor Company. The North American Escort adopted both the badge and the general design of a redesigned European model, and the name has been applied to several different designs in North America since its introduction as Ford's first successful world car....
 and the Ford Contour. It was also used in 99-00 mercury cougar, and in Europe on the 1.7 Ford Puma
Ford Puma

The Ford Puma was a small coup? produced by the Ford Motor Company from 1997 to 2002, for sale in Europe. The Puma was solely built at Ford's Niehl plant in Cologne, Germany....
.

VCT is also used in many Nissan RB
Nissan RB engine

The RB engine is a 2.0?3.0 L straight-6 Four-stroke cycle petrol/gasoline engine from Nissan.Both SOHC and DOHC versions have an aluminum head....
 engines most famously those used in Nissan's Skyline variant. And also in their popular SR
Nissan SR engine

The SR engine is a 1.6 L, 1.8 L, or 2.0 L straight-4 4-stroke from Nissan. It is an aluminum DOHC 4-valve design, with some versions incorporating variable valve timing....
 engines from 1993 onwards.

See also

  • Variable Valve Timing
    Variable valve timing

    Variable valve timing, or VVT, is a generic term for an automobile piston engine technology. VVT allows the lift, duration or timing of the intake or exhaust Poppet valve to be changed while the engine is in operation....
  • Exhaust gas recirculation
    Exhaust gas recirculation

    Exhaust gas recirculation is a nitrogen oxide emissions reduction technique used in most gasoline and diesel engines.EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinder s....