Dual vct what is

Additional benefits with optimized phasing are moderate improvements in idle stability and full load performance. In this paper, the Dual Equal VCT strategy is described, and engine dynamometer test results are shown which illustrate the benefits at part load, idle, and WOT. Implications of the strategy on phase-shifter response requirements and on the engine control system are discussed.

Subscribers can view annotate, and download all of SAE's content. Learn More ». View Details. Browse Publications Technical Papers When the VCT solenoid is energized, engine oil is allowed to flow to the VCT actuator assembly which advances or retards the camshaft timing. One half of the VCT actuator is coupled to the camshaft and the other half is connected to the timing chain. Oil chambers between the 2 halves couple the camshaft to the timing chain.

When the flow of oil is shifted from one side of the chamber to the other, the differential change in oil pressure forces the camshaft to rotate in either an advance or retard position depending on the oil flow. VCT System. Short-link Link Embed. Share from cover. Share from page:. Page 2: 2. The VCT system is enabled by the. More magazines by this user. Close Flag as Inappropriate. You have already flagged this document. Thank you, for helping us keep this platform clean.

The editors will have a look at it as soon as possible. Delete template? Cancel Delete. Cancel Overwrite Save. Don't wait! Try Yumpu. Start using Yumpu now! Terms of service. Privacy policy. Traditionally, camshafts only have been able to open the valves at a fixed point defined during engine design and manufacturing. Ti-VCT takes this technology and applies it to both the intake and exhaust camshafts of its DOHC design, using electronic solenoid valves to direct high-pressure oil to control vanes in each of the camshaft sprocket housings.

By using one valve per camshaft, controlled by the Electronic Control Module ECM , each intake and exhaust cam can be advanced or retarded independently of the other as engine operating conditions change, providing an exceptional degree of valve timing control.

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