Internal-combustion engines – Engine speed regulator – Open loop condition responsive
Patent
1992-09-25
1994-03-29
Argenbright, Tony M.
Internal-combustion engines
Engine speed regulator
Open loop condition responsive
123400, F02D 1110
Patent
active
052975223
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a throttle valve for an internal combustion engine.
Such a throttle valve is described in DE-A 37 11 779. This known throttle valve is moved via a servomotor between the completely closed position (zero degree position) and the maximum open position, which is determined by a mechanical transmitter. When the accelerator is not actuated, the mechanical transmitter brings about complete closure of the throttle valve, and thus the safety of a mechanical accelerator is achieved whilst preserving the possibilities of control of an electronic accelerator.
In the document EP-A 341 341 there is disclosed a throttle valve (16) mounted on a shaft, said throttle valve comprising an accelerator, which actuates a mechanical cable pull, said cable pull acting on a pivoting part. The pivoting part is cooperating with a stop point to displace the same, and furthermore there is provided a spring for biasing the throttle valve in the direction of the stop point. A servo motor is controlling the degree of opening of the throttle valve between the closed position and the maximum open position defined by the stop point. A restoring device actuates the stop point in the direction of the closed position on a throttle valve when the mechanical cable pull is slick, wherein stop limits the pivoting of the pivoting part to a minimum angle which is larger than the idling position of the throttle valve. A reference volume trasmitter is provided for the throttle valve position and an actual volume transmitter is associated with the servo motor.
The object of the invention is so to improve a throttle valve of the generic type that idling admission control is possible via the servomotor and the emergency properties are retained intact.
The European Patent Application 89105378, published on Mar. 10, 1990 as Document Number 0 389 649, describes a throttle valve actuator for solving the problem, wherein the throttle valve is not closed by the cable pull, but the fuel inlet only closes up to an angle of approximately 10.degree., and the remaining angular range between 0.degree. and 10.degree. is adjusted by the electric motor.
The haptic accelerator pedal feeling is impaired by a change in the power line of the actuation. This is changed by the measures proposed in the invention.
The invention proposes that the stop actuator is associated directly with the component actuated by the fuel inlet in order to limit the mechanical closure of the throttle valve.
The invention is illustrated in detail below with the aid of the FIGURE.
In the FIGURE, a throttle valve referenced 10 is installed in an induction tube of an internal combustion engine, which would have to run vertically in the diagram shown here. The throttle valve 10 is shown in the closed state, is pivotable about a shaft 12, and a swivel in the direction of the arrow 100 would move the throttle valve 10 into its open position.
The shaft 12 is bent at an angle at one end to form a radial continuation 16 which is forcibly joined to the throttle valve 10 in terms of movement, and in the continuation of its axis 14, the shaft of an operating element 18 is coaxially mounted, which has a drive lever 22 and a driven lever 28. Pivoting of the operating element 18 is controlled via the drive lever 22, and the driven lever 28 transmits this pivoting, in a manner yet to be described, to the radial continuation 16, which is forcibly joined to the throttle valve 10 in terms of movement. Furthermore, a restoring spring 24 acts on the drive lever 22, or, as shown here, on the driven lever 28, the other end of said spring being coupled to the point 26 on the housing. This restoring spring 24, which for safety reasons is formed as a double spring, acts on the throttle valve 10 in its closed position.
The driven lever 28 has a dog 30 running parallel to the axis 14 and being in contact with the continuation 16. A stop spring 32, when stressed, moves the throttle valve 10 into its open position and thus moves the continuation 16 into its contact position with the dog 30 of the ope
REFERENCES:
patent: 4668440 (1987-05-01), Sausner
patent: 4747380 (1988-05-01), Ejiri et al.
patent: 4951772 (1990-08-01), Peter et al.
patent: 5014666 (1991-05-01), Westenberger
patent: 5018496 (1991-05-01), Buchl
patent: 5141070 (1992-08-01), Hickmann et al.
"Patent Abstracts of Japan", vol. 6, No. 220 (M-169), Nov. 1982, abstract of JP,A, 57124037.
"Patent Abstracts of Japan", vol. 7, No. 47 (M-196), Feb. 1983, abstract of JP,A, 57195831.
"Patent Abstracts of Japan" vol. 9, No. 303 (M-434), Nov. 1985, abstract of JP,A, 60142027.
Argenbright Tony M.
Audi AG
LandOfFree
Throttle valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Throttle valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Throttle valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-785353