VALVETRAIN CONTROL SYSTEMS FOR INTERNAL COMBUSTION ENGINES WITH TIME AND EVENT BASED CONTROL

• Main Author: RAYL ALLEN B
• Format: Patent
• Language: English
• Published: 12.03.2009
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

A valve control system includes a vehicle control module that generates a lift mode command signal to transition one of intake and exhaust valves between N open lift modes. A time module generates a response time signal that indicates a duration of the transition and a lift limit signal that disables the transition. The time module generates the response time and lift limit signals based on current lift mode and status signals. The current lift mode signal indicates a current lift state of one of the intake and exhaust valves. The status signal indicates status of a lift control valve. The lift control valve actuates one of the intake valve and the exhaust valve. The event module generates the current lift mode and status signals based on the lift command signal, the response time signal, and the lift limit signal. One of the time and event modules enables the transition.