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Device for controlling quantity of lubricating oil in automatic transmission for vehicle
| Details |
Inventors: Iwatsuki, Kunihiro;
Assignee: Toyota Jidosha Kabushiki Kaisha (Aichi, JP)
Primary Examiner: Braun; Leslie A.
Assistant Examiner: Diehl; Dwight G.
Attorney, Agent or Firm: Parkhurst & Oliff
In a device for controlling a quantity of lubricating oil in an automatic transmission for a vehicle, wherein a pump is rotated to circulate the lubricating oil, a circulation quantity of lubricating oil is increased, decreased or changed in accordance with the speed of the vehicle. As a result, the circulation quantity of lubricating oil in the automatic transmission is constantly regulated to ensure the necessary and sufficient quantities, even when there is a throttle opening of zero, and more particularly, even during high speed coasting. |
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DETAILED DESCRIPTION The present invention obviates the above-described disadvantages of the prior art and has as its object the provision of a device for controlling a quantity of lubricating oil in an automatic transmission for a vehicle, wherein, even when a throttle opening (engine load) or a pump rotary speed (engine rotary speed) is low, for example, if a large quantity of lubricating oil is needed (as in the case of high speed coasting), then the need can be precisely satisfied.
To achieve the above-described object, as the technical illustration thereof is shown in FIG.
1, the present invention contemplates a device for controlling the quantity of lubricating oil in an automatic transmission for a vehicle, wherein a pump is rotated to circulate the lubricating oil, having sensors for detecting vehicle speed; and a control system for setting the circulation quantity of lubricating oil in accordance with at least the vehicle speed.
According to the present invention, the circulation quantity of lubricating oil is increased or decreased in accordance with at least the high or low speed of a vehicle, so that, even when the throttle opening (engine load) is fully closed for example, lubricating oil of a desired quantity is properly supplied.
In the preferred embodiment, there is provided means for increasing, decreasing or changing the circulation quantity of lubricating oil in accordance with one of the engine load, the occurrence of shifting, the type of shifting, the pattern of shifting and the gear stage, as well as speed of the vehicle.
With this arrangement, the circulation quantity of lubricating oil is properly regulated, so that the circulation quantity of lubricating oil is suited to the particular running conditions.
Additionally, the control system of the preferred embodiment provides for increasing, decreasing or changing the circulation quantity of lubricating oil in accordance with at least the type of shifting and the engine load, in addition to the high or low speed of the vehicle, for a predetermined period of time after shifting has occurred
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***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST*** *** NO IMAGES AVAILABLE***
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