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US 2013/0293174 A1Published application
Electric driving apparatus
AssigneeDenso Corporation
InventorToshiaki Uda
Life of this patent
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AssigneeDenso Corporation
InventorToshiaki Uda
Estimating the term…
A valve control apparatus is provided with a valve, a shaft supporting the valve, an end-gear of an actuator driving the valve. The shaft is press-inserted into the end-gear. A stopper disposed on the shaft regulates a valve operation range. The end-gear can engage with the middle gear of the reduction-gears mechanism even in out of the gear-operation-angle range. When a rotation angle sensor detects a rotation angle of the end-gear in out of the gear-operation-angle range, it is determined that a malfunction occurs in a rotation-force-transmitting path.
An electric driving apparatus comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Using a motor: with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
By means within the induction channel, e.g. deflectors: movable means, e.g. butterfly valves
Of the electric type: safety-related aspects
For rotating valves: characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes…
Term end not estimated
The present invention relates to a valve control apparatus including a valve and an actuator. The valve opens/closes a fluid-passage and the actuator drives the valve. Especially, the valve control apparatus is used for opening/closing an intake passage communicating with a combustion chamber of an internal combustion engine. Further, the present invention relates to an electric driving apparatus which drives a driven member by use of a driving force of an electric motor.
Conventionally, a valve control apparatus has a valve which opens/closes an intake passage communicating with a combustion chamber of an internal combustion engine, a shaft supporting the valve, and an actuator driving the valve in order to control an intake air flow rate. The actuator has an end-gear receiving a driving force from an electric motor (driving source). The end-gear is connected to the shaft, so that the valve and the actuator are connected to each other. Refer to JP-2004-124933A (GB-2393218A) and JP-2009-013934A (US-2009/0007875A1).
FIG. 6 shows a valve control apparatus 100 shown in JP-2004-124933A. An actuator 101 is provided with an end-gear 103 which is made of resin material and receives a driving force from an electric motor (driving source). A shaft 104 made of metallic material is press-inserted into a hole 106 of the end-gear 103, whereby the shaft 104 is connected with the end-gear 103. A rotation of the end-gear 103 is transmitted to the valve 107 through the shaft 104.
Other objects, features and advantages of the present invention will become more apparent from the following description made with reference to the accompanying drawings, in which like parts are designated by like reference numbers and in which:
FIG. 1 is a fragmentally sectional view showing a tumble-control-valve control apparatus according to a first embodiment;
FIG. 2 is an enlarged cross sectional view showing an essential portion of the tumble-control-valve control apparatus according to the first embodiment;
Referring to FIGS. 1 to 3, a first embodiment of the present invention will be described. In this embodiment, the present invention is applied to a tumble-control-valve control apparatus, which is referred to as a TCV control apparatus, hereinafter. The TCV control apparatus adjusts flow passage areas of intake passages 2 each of which communicates with a combustion chamber of each cylinder of an internal combustion engine, whereby tumble flow is generated in each combustion chamber.
The TCV control apparatus is provided with an intake manifold (housing) 3 defining an intake passages 2 therein, a valve 4 opening/closing the intake passage 2, a shaft 5 supporting the valve 4, an electronic actuator 6 driving the valve 4 through the shaft 5, a rotation angle sensor 7 detecting an opening degree of the valve 4, and an electronic control unit (ECU: not shown) receiving detection signals from the rotation angle sensor 7.
The intake manifold 3 is a casing which forms a plurality of intake passages 2 and is made of polyamide resin. Each of intake passages 2 has rectangular cross section and communicates with each intake port (not shown) of a cylinder head.