Description:ELECTRIC WASTEGATE ACTUATOR SYSTEM FOR TURBOCHARGER
FIELD OF INVENTION: 5
The present invention generally relates to automobiles. Specifically, the present invention relates to the field of control systems for internal combustion engines. More specifically, the present invention relates to Electric Actuator to combine high torque capabilities with less space. More particularly, the present invention relates 10 to the electric wastegate actuator system for turbocharger.
BACKGROUND OF THE INVENTION:
From the emergence of internal combustion engines, the power generated by this 15 engine relies on the quantity of air and the volume of fuel supplied to it. To enhance engine power, a greater amount of combustion air and fuel must be provided. Increasing the engine's power can be accomplished by either boosting the cubic capacity or rotational speed of the intake engine. However, expanding the cubic capacity results in a costly internal combustion engine with a relatively heavy 20 weight and large size. Particularly, augmenting the rotational speed introduces significant issues and drawbacks in a relatively sizable internal combustion engine.
In general, the adoption of supercharging has frequently been employed as a technical solution for augmenting the power of internal combustion engines. 25 Supercharging involves pre-compressing combustion air using either an exhaust gas turbocharger or a mechanically driven compressor connected to the engine. The exhaust gas turbocharger consists of a turbine and a compressor linked to a common shaft, rotating at a constant speed. The turbine converts otherwise wasted exhaust energy into rotational energy, propelling the compressor. This compressor draws in 30 fresh air, delivering pre-compressed air to the individual cylinders of the engine. With an increased volume of air, a corresponding amount of fuel is supplied to the cylinder, resulting in higher engine power output. Consequently, the combustion
3
process is positively influenced, leading to an elevated overall efficiency level of the internal combustion engine.
There are few of the reports available in the state of art about the existence of actuator system for turbocharger.
US9188058B2 discloses method for controlling a turbocharger arrangement with 5 an electric actuator and spring, the invention methods for controlling a wastegate with an electric actuator including a bias are provided. In one example, the actuator is supplied with a first current when moving a wastegate valve toward a fully open position and is supplied with a second current when moving a wastegate toward a fully closed position. The methods may ensure appropriate supply of boost to an 10 engine even in the event of wastegate degradation while enabling engine downsizing.
EP1927739A1 discloses method and device for controlling a turbocharging system, the invention relates to a method and a device for controlling a turbo-charging system, said turbo-charging system to be coupled to an internal combustion engine 15 (110, 210) and comprising a first turbo-charging unit having a first compressor stage (140, 240) and a second turbo-charging unit having a second compressor stage (150, 250). The method comprises the steps of receiving a boost pressure demand of said internal combustion engine (110, 210), determining, based upon said boost pressure demand and depending on the current operating state of said internal 20 combustion engine (110, 210), a first desired value of a first partial pressure ratio (?HP) between the pressure values immediately downstream and upstream of the first compressor stage (140, 240), and a second desired value of a second partial pressure ratio (?LP) between the pressure values immediately downstream and upstream of the second compressor stage (150, 250), and controlling the first and 25 second partial pressure ratios (?HP, ?LP) according to the first and second desired value.
DE102011120245A1 discloses electric wastegate actuator for a turbocharger, the invention includes a return spring for supporting a holding force of an output gear
4
and a stopper for adjusting a rotation angle of the output gear, thereby reducing an amount of current required for holding the output gear is consumed in a constant position. The electrical waste gate actuator for a turbocharger comprises: a case having an installation space formed by a body and a cover; a drive motor installed in the installation room; a retarder that includes gear transmissions provided with a 5 plurality of gears such that the retarder is coupled to a lever installed outside the housing and transmits power of the drive motor; and an elastic member that cooperates with the drive motor to maintain a rotational angle of a final output gear for the final transmission of power to the lever in the gear transmissions.
From the above cited documents, it is clearly inferred that the existing actuator 10 systems for turbocharger have their own advantages but lack in accuracy detection and lack of high charging pressure at low engine speeds is crucial which leads to troublesome in temperature change and highly expensive.
In the traditional electric wastegate actuator with the mentioned functionalities, the power required to rotate the final output gear is solely derived from the motor's 15 driving force, for heavy commercial vehicles & tractor applications, torque requirements will be higher, especially for engine exhaust brake applications. Thereby the electric wastegate actuator system for turbocharger of present invention is employed through the implementation of a wastegate valve in the turbocharger's charging pressure control system. 20
Hence, there is an urgent need in the state of art to develop a novel electric wastegate actuator system for turbocharger in internal combustion engines to devoid from the above said drawbacks.
25
5
OBJECTIVE OF THE INVENTION:
The main objective of the present invention is to develop a novel electric wastegate actuator.
Another objective of the present invention is to develop the electric wastegate actuator for a turbocharger in internal combustion engines. 5
Another objective of the present invention is to develop electric wastegate actuator for a turbocharger to achieve high torque capabilities with less space.
Yet another objective of the present invention is to provide a planetary gear train within the actuator system to achieve efficient torque transmission and size reduction. 10
Further objective of the present invention is to utilize the developed electric wastegate actuator for turbocharger.
SUMMARY OF THE INVENTION:
Accordingly, the present invention discloses a novel electric wastegate actuator system (1000) for a turbocharger, comprising: 15
a cover housing (1);
a lower housing (10);
a gearbox (500),
the housing (1) is secured with an installation space and comprises of a motor (2a) with a top end (100) and bottom end (200), secured with a 20 rubber motor holder (4),a sealing member (3) is incorporated between a motor anti-rotational feature (1a) and a cap (6) configured to seal a gap between the motor anti-rotational feature (1a) and the cap (6) to resist water ingression into the actuator (1000),
6
a sensor (7) contactless-type press fitted into the motor anti-rotational feature (1a) on the lower portion of the installation space,
a magnet (12a) and sector shaft (12c) are over-molded into the output gear (12b), a lower housing (10) accommodates bearings, a sealing element (9) and 5
the actuator system comprising a gear box (500) comprising a planetary gear box (500), compound gear (15), and output gear (12), the said planetary gearbox (500) comprises of intermediate gear (13) with integrated sun gear (13a) which transmits torque to planet gears (25) that orbit around it and meshes with the ring gear (26), 10
the gearbox (500) securely incorporated within the actuator for a turbocharger.
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the lower housing (10) comprises an insertion hole for the rotational shaft of the output gear and an insertion hole for non-rotation 15 shafts of the planetary gear train and the compound gear.
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the motor anti-rotational feature (1a) is a square-shaped projection secured as an integral feature acts as a rotation prevention of the motor (2a), the cap (6) securely crimped onto the motor anti-rotational 20 feature (1a) for sealing the upper end of the actuator.
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the sensor measures rotation angle by sensing a variation of a flux that is generated when the magnet (12a) is rotated with the rotation of the sector shaft (12c). 25
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the wave spring (5) provided in the actuator (1000) as vibration isolator under constant loading.
7
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the motor (2a) with top end (100) and bottom end (200),
top end (100) of the motor (2a) secured with a rubber motor holder (4), providing radial and axial dampening for improved motor stability, bottom 5 end (200) of the motor (2a) secures rotatably fixed with the motor anti-rotational feature (1a), motor shaft extends toward the lower portion of the installation space and coupled to the pinion (2b) by press fit.
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the rubber motor holder (4) is strengthened by a metal 10 plate (4a), ensuring rigidity for the motor holder (4).
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the output gear (12b) installed within lower portion of the installation space and coupled to a lever configured for transmitting power of the driving motor. 15
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the motor holder (4) holds the motor configured for proposing both radial and axial dampening to enhance motor stability.
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the insertion hole for the output gear is disclosed in 20 the lower housing (10).
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the compound gear (15) positioned lower part of the installation space meshes with the motor pinion (2b), and a compound pinion (15a) engages with the intermediate gear (13). 25
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the sun gear (13a) secures a unipartite assembly with the intermediate gear (13) by insert moulding, thereby transmits the torque to
8
the planet gears (25), typically mounted on the moveable carrier plate (23) through planet shafts (24).
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the planet gears (25) orbit around the sun gear (13a) and meshes with an ring gear (26). 5
In an aspect of the present invention, in the electric wastegate actuator system (1000) for a turbocharger, the magnet (12a) and sector shaft (12c) over-molded into the output gear (12b); a lower housing (10) with a stepped hole accommodating a sleeve bearing (11) and a needle roller bearing (18).
In an aspect of the present invention, in the electric wastegate actuator system 10 (1000) for a turbocharger, the sector shaft (12c) inserted through the bearings and laser welded with a lever assembly (19); and a sealing element (9) in the region of the cover housing (1) and lower housing (10) protects against the ingress of foreign media.
15
20
25
9
BRIEF DESCRIPTION OF DRAWINGS
Figure: 1 depicts the clear view of Electric wastegate actuator of the present invention.
Figure: 2 depicts the clear exponential view of Gear box Configuration of the Electric wastegate actuator of the present invention. 5
Figure: 3 depicts the locking of motor assembly in top housing in electric actuator system of present invention.
Figure: 4 depicts the anti – rotational feature of motor in Electric actuator system of the present invention
Figure :5 depicts the positioning of stopper in the Electric actuator system (1000) 10 of the present invention.
15
20
25
30
10
REFERENCE NUMERALS:
Reference numerals for different part numbers of “ELECTRIC WASTEGATE ACTUATOR SYSTEM FOR TURBOCHARGER” of the present invention:
S. No
PART NAME
PART NUMBER
1.
Electric Wastegate Actuator System
(1000)
2.
Housing with motor anti-rotational feature and mechanical stopper
(1, 1a, 1b)
3.
Driving motor with motor pinion
(2a,2b)
4.
Sealing member
(3)
5.
Motor holder
(4)
6.
Wave spring
(5)
7.
Cap
(6)
8.
Sensor
(7)
9.
Screw - Sensor
(8)
10.
Cover seal
(9)
11.
Lower housing
(10)
12.
Sleeve bearing
(11)
13.
Sector gear, magnet, sector gear, shaft
(12, 12a, 12b, 12c)
14.
Intermediate gear and Sun gear
(13, 13a)
15.
Planetary gear box
(14)
11
16.
Compound gear
(15)
17.
Shaft – Planetary gear box
(16)
18.
Shaft – compound gear
(17)
19.
Roller bearings
(18)
20.
Lever assembly, lever, guide link
(19, 19a, 19b)
21.
Screw, Ring gear cover
20, 21
22.
Carrier pinion and Carrier plate
(22, 23)
23.
Planet shafts
(24)
24.
Planet gears
(25)
25.
Ring gear
(26)
5
10
15
12
DETAILED DESCRIPTION OF THE INVENTION:
The present invention as embodied by an “ELECTRIC WASTEGATE ACTUATOR SYSTEM FOR TURBOCHARGER” succinctly fulfills the above-mentioned need[s] in the art. The present invention has objective[s] arising as a result of the need mentioned above [s], said objective[s] being enumerated 5 below. In as much as the objective[s] of the present invention are enumerated, it will be obvious to a person skilled in the art that, the enumerated objective[s] are not exhaustive of the present invention in its entirety and are enclosed solely for the purpose of illustration. Further, the present invention encloses within its scope and purview, any structural alternative[s] and/or any functional equivalent[s] even 10 though, such structural alternative[s] and/or any functional equivalent[s] are not mentioned explicitly herein or elsewhere, in the present disclosure. The present invention therefore encompasses also, any improvisation[s]/modification[s] applied to the structural alternative[s]/functional alternative[s] within its scope and purview. The present invention may be embodied in other specific form[s] without 15 departing from the essential attributes thereof.
Throughout this specification, the use of the word "comprises" and variations such as "comprises" and "comprising" may imply the inclusion of an element or elements not specifically recited. 20
The present invention generally relates to the field of Electric Wastegate Actuator system for turbocharger. The major configuration with components of the electric wastegate actuator system of the present invention characterized as follows:
25
Housing Configuration
The electric wastegate actuator comprises a
(1) with an installation space created by a body and a cover housing (1). The cover includes an insertion hole for the non-rotation shafts of various gears. The cover also includes a mechanical stopper (1b) to limit the rotation of the output gear (12b). 30
13
A sealing member (3) is used between the cover and cap (6) to prevent water ingress.
Motor Configuration:
The driving motor (2a) is vertically oriented and held approximately perpendicular 5 to the ground surface. The bottom end of the motor is rotatably fixed with the cover.
Rubber motor holder (4) provides radial and axial dampening for improved motor stability. An integrated metal plate (4a) strengthens the rubber motor holder for increased rigidity. Motor shaft extends towards the lower portion of the installation space and is coupled to the pinion (2b). 10
Sensor Configuration:
A magnet (12a) is positioned at one end of the output gear's rotational shaft. A position sensor (7) situated above the magnet detects changes in flux density to measure rotation angle. The sensor is a contactless-type press-fitted into the cover 15 housing.
Gear Configuration:
A compound gear (15) with spur teeth is positioned in the lower part of the installation space. The compound gear meshes with the motor pinion (2b) and the 20 intermediate gear (13). The sun gear (13a) of the planetary gear train (14) forms a unipartite assembly with the intermediate gear. The planet gears (25) orbit around the sun gear and mesh with the outer ring gear (26). The carrier pinion (22) engages with the output gear (12b), which has a magnet and sector shaft over-molded into it. 25
Shaft and Bearing Configuration:
The lower housing (10) features a stepped hole accommodating a sleeve bearing (11) and a needle roller bearing (18). The sector shaft (12c) is inserted through the bearings and laser welded with the lever assembly (19). 30
14
Sealing and Protection:
The electric wastegate actuator is fully protected against the ingress of foreign media and the escape of lubricant. Sealing elements (9) are provided in the region of the cover housing (1) and lower housing (10).
5
In first embodiment, the present invention discloses an electric wastegate actuator system (1000) for a turbocharger, comprising:
i. a cover housing (1);
ii. a lower housing (10);
iii. a gearbox (500), 10
the housing (1) is secured with an installation space and comprises of a motor (2a) with a top end (100) and bottom end (200), secured with a rubber motor holder (4),a sealing member (3) is incorporated between a motor anti-rotational feature (1a) and a cap (6) configured to seal a gap between the motor anti-rotational feature (1a) and the cap (6) to resist 15 water ingression into the actuator (1000),
a sensor (7) contactless-type press fitted into the cover (1a) on the lower portion of the installation space,
a magnet (12a) and sector shaft (12c) are over-molded into the output gear (12b), a lower housing (10) accommodates bearings, a sealing 20 element (9) and
the actuator system comprising a gear box (500) comprising a planetary gear box (500), compound gear (15), and output gear (12), the said planetary gearbox (500) comprises of intermediate gear (13) with integrated sun gear (13a) which transmits torque to planet gears (25) that 25 orbit around it and meshes with the ring gear (26),
the gearbox (500) securely incorporated within the actuator for a turbocharger.
In the preferred embodiment of the present invention, the lower housing 30 (10) comprises an insertion hole for the rotational shaft of the output gear
15
and an insertion hole for non-rotation shafts of the planetary gear train and the compound gear.
In the preferred embodiment of the present invention, the cover (1a) is a square-shaped projection secured as an integral component acts as a rotation 5 prevention of the motor (2a), the cap (6) securely crimped onto the cover (1a) for sealing the upper end of the actuator.
In the preferred embodiment of the present invention, the sensor measures 10 rotation angle by sensing a variation of a flux that is generated when the magnet (12a) is rotated with the rotation of the sector shaft (12c).
In the preferred embodiment of the present invention, the wave spring (5) provided in the actuator (1000) as vibration isolator under constant loading. 15
In the preferred embodiment of the present invention, the motor (2a) with top end (100) and bottom end (200), top end (100) of the motor (2a) secured with a rubber motor holder (4), providing radial and axial dampening for improved motor stability, bottom end (200) of the motor (2a) secures 20 rotatably fixed with the cover (1a), motor shaft extends toward the lower portion of the installation space and coupled to the pinion (2b) by press fit and Ring gear cover which locks the axial play of planet gears and carrier plate as a gearbox.
25
In the preferred embodiment of the present invention, the rubber motor holder (4) is strengthened by a metal plate (4a), ensuring rigidity for the motor holder (4).
30
16
In the preferred embodiment of the present invention, the output gear (12b) installed within lower portion of the installation space and coupled to a lever configured for transmitting power of the driving motor.
In the preferred embodiment of the present invention, the motor holder (4) 5 holds the motor configured for proposing both radial and axial dampening to enhance motor stability.
In the preferred embodiment of the present invention, the mechanical stopper (1b) on the rear surface of the cover on the axis of the insertion hole for the 10 output gear is in the lower housing (10).
Insertion hole for the output gear is in the lower housing (10). Housing (1) does not have hole for output shaft.
15
In the preferred embodiment of the present invention, the compound gear (15) positioned lower part of the installation space meshes with the motor pinion (2b), and a compound pinion (15a) engages with the intermediate gear (13). 20
In the preferred embodiment of the present invention, the sun gear (13a) secures a unipartite assembly with the intermediate gear (13) by insert moulding, thereby transmits the torque to the planet gears (25), typically mounted on the moveable carrier plate (23) through planet shafts (24). 25
In the preferred embodiment of the present invention, the planet gears (25) orbit around the sun gear (13a) and meshes with an outer ring gear (26).
In the preferred embodiment of the present invention, the magnet (12a) and 30 sector shaft (12c) over-molded into the output gear (12b); a lower housing
17
(10) with a stepped hole accommodating a sleeve bearing (11) and a needle roller bearing (18).
In the preferred embodiment of the present invention, the sector shaft (12c) inserted through the bearings and laser welded with a lever assembly (19); 5 and a sealing element (9) in the region of the cover (1) and lower housing (10) protects against the ingress of foreign media.
In second embodiment, the present invention discloses a method of operating an electric wastegate actuator system (1000) for a turbocharger, comprising: 10
a) activating a driving motor (2a) and transmitting power from the driving motor (2a) to the output gear (12b) through a gearbox with a planetary gear train (14);
b) coupling the output gear (12b) to a lever installed outside the 15 housing (1) to control wastegate function and detecting the rotation angle of the output gear (12b) using a position sensor within the housing (1);
c) providing radial and axial dampening to enhance motor stability with a motor holder (4) which prevents water ingression into the 20 actuator with a sealing member (3) between the cover housing (1) and the cap (6); isolating vibration using a wave spring (5);
d) measuring rotation angle using a contactless-type sensor (7) press fitted into the cover housing (1) followed by engaging gears including a compound gear (15) with spur teeth, a planetary gear box 25 (14) with a sun gear (13a), planet gears (25), and ring gear (26), and a carrier pinion (22) and carrier plate (23);
e) over-molding a magnet (12a) and sector shaft (12c) into the output gear (12b) sealing element (9) protects the ingress of foreign media in the region of the cover housing (1) and lower housing (10); and 30
18
controlling wastegate function based on the rotation angle of the output gear (12b) and engine operating condition.
Experimental analysis of the present invention:
Details
Novel Features
Existing Features
Size (mm) L x W x H
140 x 79 x 118
133 x 87 x 129
Torque (Nm)
= 3 @ 150°C
= 2 @ 130°C
Weight
0.8 kg
1.5 kg
Housing
Plastic – metal housing
Fully metal housing
Motor Used
PMDC motor
BLDC motor
Cost
Low
High
Availability
In proto stage
In market
5
Advantages of the present invention:
The utility factor of the present invention is to combine high torque capabilities with less space by a novel Waste Gate Electric Actuator (WGEA) for a turbocharger.
The planetary gear train within the actuator system achieves efficient torque 10 transmission and size reduction.
The foregoing description and drawings merely explain and illustrate the invention and the invention is not limited thereto except insofar as the amended claims are so limited, as those skilled in the art who have the disclosure before them will be able 15 to make modifications and variations therein without departing from the scope of the invention.
20 , Claims:WE CLAIM:
1. An electric wastegate actuator system (1000) for a turbocharger, comprising:
i. a cover housing (1);
ii. a lower housing (10); 5
iii. a gearbox (500),
wherein the housing (1) is secured with an installation space and comprises of a motor (2a) with a top end (100) and bottom end (200), secured with a rubber motor holder (4),a sealing member (3) is incorporated between a motor anti-rotational feature (1a) and a cap (6) 10 configured to seal a gap between the motor anti-rotational feature (1a) and the cap (6) to resist water ingression into the actuator (1000),
wherein a sensor (7) contactless-type press fitted into the motor anti-rotational feature (1a) on the lower portion of the installation space,
wherein a magnet (12a) and sector shaft (12c) are over-molded into the 15 output gear (12b), a lower housing (10) accommodates bearings, a sealing element (9) and
wherein the actuator system comprising a gear box (500) comprising a planetary gear box (500), compound gear (15), and output gear (12), the said planetary gearbox (500) comprises of intermediate gear (13) with 20 integrated sun gear (13a) which transmits torque to planet gears (25) that orbit around it and meshes with the ring gear (26),
wherein the gearbox (500) securely incorporated within the actuator for a turbocharger.
25
2. The electric wastegate actuator system (1000) for a turbocharger, as claimed in claim 1, the lower housing (10) comprises an insertion hole for the rotational shaft of the output gear and an insertion hole for non-rotation shafts of the planetary gear train and the compound gear.
30
20
3. The electric wastegate actuator system (1000) for a turbocharger, as claimed in claim 1, wherein the motor anti-rotational feature (1a) is a square-shaped projection secured as an integral feature acts as a rotation prevention of the motor (2a), the cap (6) securely crimped onto the motor anti-rotational feature (1a) for sealing the upper end of the actuator. 5
4. The electric wastegate actuator system (1000) for a turbocharger, as claimed in claim 1, the sensor measures rotation angle by sensing a variation of a flux that is generated when the magnet (12a) is rotated with the rotation of 10 the sector shaft (12c).
5. The electric wastegate actuator system (1000) for a turbocharger, as claimed in claim 1, the wave spring (5) provided in the actuator (1000) as vibration isolator under constant loading. 15
6. The electric wastegate actuator system (1000) for a turbocharger, as claimed in claim 1, wherein the motor (2a) with top end (100) and bottom end (200),
top end (100) of the motor (2a) secured with a rubber motor holder (4), providing radial and axial dampening for improved motor stability, bottom 20 end (200) of the motor (2a) secures rotatably fixed with the motor anti-rotational feature (1a), motor shaft extends toward the lower portion of the installation space and coupled to the pinion (2b) by press fit.
7. The electric wastegate actuator system (1000) for a turbocharger, as claimed 25 in claim 1, wherein the rubber motor holder (4) is strengthened by a metal plate (4a), ensuring rigidity for the motor holder (4).
8. The electric wastegate actuator system (1000) for a turbocharger, as claimed in claim 1, wherein the output gear (12b) installed within lower portion of 30 the installation space and coupled to a lever configured for transmitting power of the driving motor.
21
9. The electric wastegate actuator system (1000) for a turbocharger, as claimed in claim 1, wherein the motor holder (4) holds the motor configured for proposing both radial and axial dampening to enhance motor stability.
5
10. The electric wastegate actuator system (1000) for a turbocharger, as claimed in claim 1, wherein the insertion hole for the output gear is disclosed in the lower housing (10).
11. The electric wastegate actuator system (1000) for a turbocharger, as claimed 10 in claim 1, wherein the compound gear (15) positioned lower part of the installation space meshes with the motor pinion (2b), and a compound pinion (15a) engages with the intermediate gear (13).
12. The electric wastegate actuator system (1000) for a turbocharger, as claimed 15 in claim 1, wherein the sun gear (13a) secures a unipartite assembly with the intermediate gear (13) by insert moulding, thereby transmits the torque to the planet gears (25), typically mounted on the moveable carrier plate (23) through planet shafts (24).
20
13. The electric wastegate actuator system (1000) for a turbocharger, as claimed in claim 1, wherein the planet gears (25) orbit around the sun gear (13a) and meshes with an ring gear (26).
14. The electric wastegate actuator system (1000) for a turbocharger, as claimed 25 in claim 1, wherein the magnet (12a) and sector shaft (12c) over-molded into the output gear (12b); a lower housing (10) with a stepped hole accommodating a sleeve bearing (11) and a needle roller bearing (18).
15. The electric wastegate actuator system (1000) for a turbocharger, as claimed 30 in claim 1, wherein the sector shaft (12c) inserted through the bearings and
22
laser welded with a lever assembly (19); and a sealing element (9) in the region of the cover housing (1) and lower housing (10) protects against the ingress of foreign media.
5
Dated this 29th day of February 2024
-SD-
Kalyanchand Jhabakh (IN/PA-830) 10
Agent for Applicant.
15
20
25
30