Dual-equal Cam Phaser for Independent Valve Timing Control

The cam phaser system is segmented into two independent phasers: a first cam phaser for controlling the intake camshaft and a second cam phaser for controlling the exhaust camshaft. Each phaser can independently adjust timing within its own range, enabling separate control of intake and exhaust valve timing to optimize engine performance under different operating conditions.

The patent employs a nested configuration where the first and second cam phasers are integrated within a shared housing structure. The vanes of both phasers operate within a common fluid chamber environment, and the housing provides a unified mounting interface on the camshaft, creating a compact nested arrangement that reduces overall system complexity while maintaining independent control capabilities.

The cam phaser system enables dynamic adjustment of cam timing based on real-time engine operating conditions. By controlling fluid pressure to the vanes, the timing of both intake and exhaust cams can be continuously varied, allowing the engine control system to optimize the balance between power output and combustion stability for different operating scenarios such as idle, cruising, or high-load conditions.

The system changes the timing parameter of camshaft rotation independently for intake and exhaust strokes. By adjusting the angular position of each cam phaser through fluid pressure control, the valve opening and closing timing parameters are optimized to achieve both high power output and stable combustion characteristics under varying engine loads and speeds.

The dual cam phaser system dynamically adjusts intake and exhaust valve timing to optimize the air-fuel mixture management and exhaust gas recirculation. By controlling the duration and timing of valve events, the system can reduce fuel consumption during efficient operating conditions while maintaining emissions control through optimized exhaust timing and potential EGR management.

The system modifies valve timing parameters to optimize both fuel efficiency and emissions. By adjusting the cam phaser positions, the valve lift duration and timing are optimized to improve combustion efficiency (reducing fuel consumption) while also controlling the timing of exhaust gas discharge and potential recirculation, thereby managing emissions output.