192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1987-01-09
1988-09-06
Bonck, Rodney H.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
74872, 192 0092, 192 358, 192 4C, 414469, B60K 4104, B60K 4122, B60K 4126, B60K 4128
Patent
active
047686367
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a forward/reverse drive controller for rapidly shifting the driving mode of a vehicle equipped with an automatic transmission between forward drive and reverse drive (this shifting operation will be referred to as "forward/reverse shifting operation" hereinafter) and, more particularly, to a forward/reverse drive controller applicable to industrial vehicles, such as fork lift trucks, and capable of carrying out a rapid forward/reverse shifting operation upon the operation of a forward/reverse shift control lever during the forward or reverse running of the vehicle. Note, the applicability of the present invention is not limited to a forward/reverse drive controller for only industrial vehicles.
BACKGROUND ART
The drive mode of an industrial vehicle, such as a fork lift truck, must be frequently shifted between a forward drive mode and reverse drive mode during loading/unloading work.
In an industrial vehicle equipped with a conventional manual shift transmission, a series of operations must be carried out to achieve the rapid forward/reverse shifting of the drive mode, as follows.
(1) The vehicle is braked to reduce the running speed to an extent where to-and-fro running is possible.
(2) The clutch is disengaged to shift the transmission from the second speed to the low speed, and then the forward/reverse shift control lever is operated.
(3) The throttle valve is opened while the clutch is kept in a slipping engagement to invert the running direction of the vehicle.
The series of foregoing operations is carried out by making effective use of the long experience of the driver. Therefore, sometimes, the transmission is damaged by coercive forward/reverse shifting operation at a running speed where shift-down and forward/reverse shift are impossible. In a vehicle equipped with a manual transmission, a series of such intricate operations requires a high-level operating skill, and burdens the driver with difficult work. On the other hand, various vehicles including industrial vehicles, such as fork lift trucks, equipped with an automatic transmission have been proposed in recent years. Vehicles equipped with an automatic transmission are required to allow rapid forward/reverse shifting operation in a manner that can be carried out by a skilled driver without the difficult operations necessary for the forward/reverse shifting of the drive mode of a vehicle equipped with a conventional manual transmission.
DISCLOSURE OF THE INVENTION
Accordingly, it is an object of the present invention to prevent such problems inherent in vehicles equipped with a manual transmission from being encountered by a vehicle equipped with an engine, an accelerator pedal, a clutch provided in the engine output transmission system, to connect and disconnect the engine and the driven part, and an automatic transmission to which the engine output is transmitted through the clutch.
It is another object of the present invention to provide a forward/reverse drive controller capable of controlling the driving mode of the foregoing vehicle for forward/reverse shifting operation without difficulty in the same manner as carried out by a skilled driver when driving a vehicle equipped with a manual transmission.
It is further object of the present invention to provide a forward/reverse drive controller capable of rapidly controlling the driving mode of the foregoing vehicle for forward/reverse shifting operation.
It is still a further object of the present invention to provide a forward/reverse drive controller capable of controlling the foregoing vehicle for forward/reverse shifting operation by accurately recognizing the purpose of operation of the forward/reverse shift control lever by the driver, capable of improving the accessibility by eliminating ineffective actions of the driving means for driving the clutch control mechanism and driving means for driving the automatic transmission shifting mechanism, and capable of reducing the load on and improving the durability of the driving means
REFERENCES:
patent: 3348644 (1967-10-01), Hilpert
patent: 3543891 (1970-12-01), Mathers
patent: 3910389 (1975-10-01), Pleier
patent: 3913700 (1975-10-01), James
patent: 4300652 (1981-11-01), Redzinski et al.
patent: 4419909 (1983-12-01), Opperud et al.
Akima Hideo
Hata Seiichi
Hyodo Masaya
Ito Kazunori
Kitagawa Kiyoshi
Bonck Rodney H.
Fujitsu Limited
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
LandOfFree
Forward/reverse drive controller for controlling a rapid forward does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Forward/reverse drive controller for controlling a rapid forward, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Forward/reverse drive controller for controlling a rapid forward will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1601815