143:) is the name given by Ford to engines with the ability to advance or retard the timing of both the intake and exhaust camshafts independently, unlike the original versions of VCT, which only operated on a single camshaft. This allows for improved power and torque, particularly at lower engine RPM, as well as improved fuel economy and reduced emissions. Some Ford Ti-VCT engines use BorgWarner's cam torque actuation (CTA) which utilizes the "existing torsional energy in the valve train to rotate the camshaft" instead of traditional oil pressure driven cam phasing.
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that direct high pressure 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
62:
For twin-cam or DOHC engines, VCT was used on either the intake or exhaust camshaft. (Engines that have VCT on both camshafts are now designated as Ti-VCT.↓) The use of variable camshaft timing on the exhaust camshaft is for improved emissions, and vehicles with VCT on the exhaust camshaft do not
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the flow of oil to the phaser cavity. The phaser cavity changes the valve timing by rotating the camshaft slightly from its initial orientation, which results in the camshaft timing being advanced. The PCM adjusts the camshaft timing depending on factors such as engine load and RPM.
67:(EGR) as retarding the exhaust cam timing achieves the same result. VCT on the intake camshaft is used primarily for increasing engine power and torque as the PCM is able to optimize the opening of the intake valves to match the engine conditions.
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was equipped with variable camshaft timing. The 6.2L V8 introduced in the 2010 SVT Raptor also uses VCT. That motor has a single cam per bank, so it is dual-equal variable cam timing.
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252:"TWIN INDEPENDENT VARIABLE CAMSHAFT TIMING (TI-VCT) HELPS MAKE 2011 FORD MUSTANG V-6 A TRUE THOROUGHBRED"
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108:, Ford Contour, and 1999–2002 Mercury Cougar used VCT on the exhaust camshaft. The 2002–2004
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in Europe) also featured VCT, but on the intake camshaft of its modified version of the 2.0L
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296:"The Ford 5.0-Liter Mustang is Back With BorgWarner Variable Cam Timing (VCT) Technology"
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Right-hand side VCT oil control solenoid and harness from a Ford 4.6L SOHC 3V V8 engine
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45:. It allows for more optimum engine performance, reduced emissions, and increased
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225:"Tests Help Check for Problems with Variable Camshaft Timing System"
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Many new Ford engines feature Ti-VCT, including ones used in the
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227:. Auto Inc online edition, 07/10/02. Archived from
49:compared to engines with fixed camshafts. It uses
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16:Automobile variable valve timing technology
51:electronically controlled hydraulic valves
137:Twin independent variable camshaft timing
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254:. Ford Motor Company. Archived from
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272:. BorgWarner Inc. Archived from
124:-S engine found in the European
120:engine. In addition, the 1.7L
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270:"Cam Torque Actuated Phasers"
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177:Engines using CTA system:
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205:Exhaust gas recirculation
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65:exhaust gas recirculation
41:technology developed by
28:Variable camshaft timing
78:engine, the Australian
104:used in the 1998–2003
70:VCT is used in Ford's
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323:Variable valve timing
200:Variable valve timing
185:Engines without CTA:
39:variable valve timing
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328:Ford Motor Company
148:2011-2012 Mustangs
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276:on 6 October 2014
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168:2011-2016 F-150
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106:Ford Escort ZX2
92:Ford Mustang GT
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47:fuel efficiency
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258:on 2016-10-18.
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90:and 2005-2010
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299:. Retrieved
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278:. Retrieved
274:the original
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256:the original
229:the original
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82:182 and 240
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189:3.7 Cyclone
160:2011 Fiesta
317:Categories
211:References
181:5.0 Coyote
172:2012 Focus
36:automobile
301:2 October
280:2 October
152:2011 Edge
126:Ford Puma
110:SVT Focus
97:The 2.0L
84:Inline-6s
194:See also
102:inline-4
63:require
34:) is an
58:History
170:, and
141:Ti-VCT
132:Ti-VCT
72:Triton
122:Zetec
118:Zetec
114:ST170
99:Zetec
80:Barra
303:2014
282:2014
43:Ford
32:VCT
319::
237:^
174:.
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76:V8
305:.
284:.
139:(
112:(
30:(
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