About 89 results
https://drivepatents.com/patents/1090772 · 2 Jan 2004
A method that uses a dither signal (38) for reducing hysteresis effect in a variable cam timing system (10) is provided. The method includes the steps of: a) providing (82) a dither signal (38) having at least two switchable frequencies; b) determining (86...
https://drivepatents.com/patents/1090638 · 2 Jan 2004
In a variable cam timing (VCT) system (10a) which has a feedback control loop wherein an error signal (36) relating to at least one sensed position signal of either a crank shaft position (24a) or at least one cam shaft position (22a) is fed back for corre...
https://drivepatents.com/patents/1090779 · 2 Jan 2004
In a Variable Cam Timing (VCT) control system (40), there are conditions when the system must operate in an open-loop mode, and other situations where closed-loop operation is desired. A number of operating states is provided for VCT control system to swit...
https://drivepatents.com/patents/1090777 · 2 Jan 2004
In a VCT system (10a), a method uses a controller to automatically determine a state of a phaser (42) based on an identifier (50). The identifier (50) identifies a filtered signal (48) of the crank shaft (24) and cam shaft (22)and uses the same to identify...
https://drivepatents.com/patents/1090770 · 2 Jan 2004
An engine with dependent intake cams (Fig. 2) requires a different method and formula to determine the phase of the intake cams (94). The exhaust camshaft (92) drives the intake camshaft (94) and so the intake cam position is dependent upon the exhaust cam...
https://drivepatents.com/patents/1090588 · 2 Jan 2004
The engine (1) has a two-stage turbocharger system. The inlet air (23) passes through a low-pressure compressor (17) driven directly (12) by a low-pressure turbine (16), and through a high-pressure compressor (14) driven (15) by two separate high-pressure ...
https://drivepatents.com/patents/1092252 · 29 Oct 2003
Exhaust gas turbocharger with variable turbine geometry comprises a distributor (10) having a ring of guide blades (50) pivotably arranged by blade journals (52) on a blade bearing ring (20). Each blade journal axially passes through the blade bearing ring...
https://drivepatents.com/patents/1092260 · 29 Oct 2003
An electric positional actuator (14) that includes a default device (66) for positioning the actuated device in a default position. The actuator (14) includes an electric motor (26) that controls the rotational position of a shaft (18) through a gear syste...
https://drivepatents.com/patents/1092296 · 29 Oct 2003
A remotely mounted 4-way valve (2) or two solenoid valves (12) (13) control a center mounted spool valve (28). In the 4-way valve embodiment, one control port (3) provides oil pressure to one end (26) of the spool valve (28) and the other control port (4) ...
https://drivepatents.com/patents/1093389 · 10 Sep 2003
An electronic throttle control system is described. The system includes a non-contacting sensor stator integrated into an electronic throttle body and is aligned to the sensor rotor attached to the shaft to properly set sensor air gap by assembly aids or b...