Jun 19, 2018  a. Controlled by their genes b. Controlled by their environment c. Controlled by a combination of their genes and their environment d. Proactive and have freedom of choice Question 2 Rather than thinking in terms of laws and a law-like external reality, those who think systemically focus on: a. Patterns of interaction b. Either/or dichotomies c.

US0A1 - Variable force solenoid with integrated position sensor- Google Patents US0A1 - Variable force solenoid with integrated position sensor- Google Patents Variable force solenoid with integrated position sensorInfo Publication number US0A1 US0A1 US12/377,035 US37703507A USA1 US 0 A1 US0 A1 US 0A1 US 37703507 A US37703507 A US 37703507A US A1 US A1 US A1 Authority US United States Prior art keywords position sensor phaser housing integrated position sensor Prior art date 2006-08-25 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Abandoned Application number US12/377,035 Inventor Roger T. Simpson Danny R. Taylor Current Assignee (The listed assignees may be inaccurate.

Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)BorgWarner IncOriginal Assignee BorgWarner Inc Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) 2006-08-25 Filing date 2007-07-06 Publication date 2011-08-25 Priority to US82352906P priority Critical 2007-07-06 Application filed by BorgWarner Inc filed Critical BorgWarner Inc 2007-07-06 Priority to PCT/US2007/072909 priority patent/WOA2/en 2007-07-06 Priority to US12/377,035 priority patent/US0A1/en 2007-08-16 Assigned to BORGWARNER INC. Reassignment BORGWARNER INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TAYLOR, DANNY R., SIMPSON, ROGER T.

2011-03-03 Publication of US0A1 publication Critical patent/US0A1/en 2020-04-17 Application status is Abandoned legal-status Critical Links. 47 decreasing Effects 0 claims abstract description 3.

85 combustion Methods 0 claims description 3Images.Classifications. F— MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING. F01— MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES. F01L— CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES.

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F01L1/00— Valve-gear or valve arrangements, e.g. Lift-valve gear. F01L1/34— Valve-gear or valve arrangements, e.g. Lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift. F01L1/344— Valve-gear or valve arrangements, e.g. Lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. Using helicoidal gear.

F01L1/3442— Valve-gear or valve arrangements, e.g. Lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. Using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force. F— MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING. F01— MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES. F01L— CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES. F01L2820/00— Details on specific features characterising valve gear arrangements.

F01L2820/04— Sensors. F01L2820/041— Camshafts position or phase sensorsAbstract.

A phaser for an engine having at least one camshaft comprising a housing, a rotor, a control valve, an actuator, and a pulse wheel. The rotor connects to a camshaft coaxially located within the housing. The housing and the rotor define at least one vane separating a chamber in the housing. The vane is capable of rotation to shift the relative angular position of the housing and the rotor. The control valve is received by the rotor and directs fluid to the chambers of the phaser. The actuator positions the control valve and has at least one integrated position sensor, such that electrical connections for the actuator and the integrated position sensor are made through one connection, decreasing leakage of fluid from the phaser.

A pulse wheel is mounted on the phaser for rotation therewith and in alignment with the integrated position sensor of the actuator. Modern engines have variable cam timing phasers mounted to one or more cams on the engine. These phasers can be used to change the timing of the valves or can be used to vary the duration of the valves depending on the cam and lifter arrangement. One method to adjust the position of the phaser is to use a center mounted spool controlled by a variable force solenoid (VFS) and have a separate position sensor to provide feedback to the electronic controller to adjust its position. Therefore on a four cam engine, there are four connectors for the variable force solenoid and four connectors for each of the associated sensors, resulting in eight locations for oil to leak out of the engine.

A variable cam timing phaser for an internal combustion engine having at least one camshaft comprising a housing, a rotor, a control valve, an actuator, and a pulse wheel. The housing has an outer circumference for accepting drive force. The rotor connects to a camshaft coaxially located within the housing. The housing and the rotor define at least one vane separating a chamber in the housing. The vane is capable of rotation to shift the relative angular position of the housing and the rotor. The control valve is received by the rotor and directs fluid to the chambers of the phaser.

The actuator positions the control valve and has at least one integrated position sensor, such that electrical connections for the actuator and the integrated position sensor are made through one connection, decreasing leakage of fluid from the phaser. A pulse wheel is mounted on the phaser for rotation therewith and in alignment with the integrated position sensor of the actuator. Internal combustion engines have employed various mechanisms to vary the angle between the camshaft and the crankshaft for improved engine performance or reduced emissions. The majority of these variable camshaft timing (VCT) mechanism use one or more “vane phasers” on the engine camshaft 26 (or camshafts, in a multiple-camshaft engine). In most cases, the phasers have a rotor 6 with one or more vanes, mounted to the end of the camshaft 26, surrounded by a housing 2 with the vane chambers into which the vanes fit. It is possible to have the vanes mounted to the housing 2, and the chambers in the rotor 6, as well.

The housing's outer circumference forms the sprocket 4, pulley or gear accepting drive force through a chain, belt, or gears, usually from the crankshaft, or possible from another camshaft in a multiple-cam engine. The rotor 6 has a bore 6 a that receives a control valve 8. The control valve 8 directs fluid flow to shift the relative angular position of the rotor 6 relative to the housing 2. The position of the control valve 8 is influenced by an actuator 12 on one end and a spring (not shown) on the opposite end. The actuator 12 as shown in FIG.

1 is a variable force solenoid, although other actuators such as a stepper motor assembly with integral position sensor, or any actuator with linear motion may be used. In prior art phasers, as discussed in the background, multiple separate position sensors provide feedback to the electronic controller regarding the position of the camshaft relative to the crankshaft and the position of the phaser. In turn the feedback is sent from the electronic controller to the variable force solenoid, which influences the position of the control valve and the phaser. The multiple position sensors of the prior art phasers require multiple connectors and connections between the position sensors and the electronic controller and the variable force solenoid.

In order to reduce the leakage that occurs in the prior art systems, the position sensor 14 of the phaser of the present invention is integrated into the variable force solenoid (VFS) 12, such that the electrical connections for the solenoid 12 and the position sensor 14 are made through one connector 16. Due to the magnetic flux and magnetic pathways associated with the variable force solenoid 12, the position sensor 16 must be isolated from such magnetic pathways of the VFS 12 as shown in FIGS. The variable cam timing phaser of claim 6, wherein the integrated position sensor contains a magnet, and wherein when the magnets of the rubber ring pass the integrated position sensor, the sensor detects changes in the magnetic field, determining the position of the phaser.