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US 8,025,034 B2Granted
Interval phasing for valve timing
AssigneeFord Global Technologies, LLC
InventorVince Winstead
Life of this patent
Estimating the term…
Abstract
A system for communicating information between a valve controller and an engine controller is presented. The system is designed to improve the timing of data transferred between two controllers.
Claims20
A system for controlling a multiple cylinder internal combustion engine with electromagnetic valve actuation, comprising:
- at least one cylinder with an engine cylinder valve;
- a valve slave controller operably coupled to the engine cylinder valve, said controller to adjust valve opening and/or closing timing of the engine cylinder valve;
- a master controller connected to the valve slave controller with a link, the master controller to:
- send a first valve timing command signal to the valve slave controller to control the valve for a combustion event;
- send a second valve timing command signal to the valve slave controller to control the valve for said combustion event, said second valve timing command signal sent after sending said first valve timing command signal;
- and
- adjust a timing of sending said first and second valve timing command signals with engine speed.
4 more elements
A method for controlling an internal combustion engine having a plurality of cylinders using electronic valve actuation, comprising:
- measuring an engine speed;
- determining a latency time required to calculate and transmit a first valve timing to a valve controller;
- determining a first crank angle phasing based on the latency time and measured engine speed to send the first valve timing to the valve controller;
- determining a second crank angle phasing based on the latency time and measured engine speed to send a second valve timing to update the valve controller;
- and
- transmitting the first valve timing to the valve controller according to the first crank angle phasing and transmitting the second valve timing to the valve controller according to the second crank angle phasing.
3 more elements
A method for controlling an internal combustion engine having a plurality of cylinders using electronic valve actuation, comprising:
- measuring an engine speed;
- determining a latency time required to calculate and transmit valve timing information to a valve controller;
- determining a crank angle phasing based on the latency time and measured engine speed to send the valve timing information to the valve controller;
- calculating valve timing information based on an engine operating condition;
- and
- transmitting the valve timing information to the valve controller according to the determined crank angle phasing.
3 more elements
Dependencies are inferred from the claim text.