192 clutches and power-stop control – Transmission control and clutch control – Common control
Patent
1981-12-10
1985-05-14
Krizmanich, George H.
192 clutches and power-stop control
Transmission control and clutch control
Common control
74868, B60K 4122
Patent
active
045166692
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a gear shifting device for manual gearboxes, comprising a range selector control for at least engaging the reverse gear and a forward gear and neutral position, and a shifter arm coupled together with the shifter of the gearbox and operated through the range selector control.
When transport vehicles, for example heavily loaded trucks and buses, are driven, especially in city traffic, the driver perpetually must kick up and down for adapting the tractive power and speed to the prevailing and constantly changing conditions. Vehicles of this type normally are equipped with a manual gearbox, and each shifting of gear, thus, is carried out manually. The shifting of gear in manual gearboxes, however, requires relatively great force, which can amount to 38 kp, and which the driver has to invest for each shifting operation. As such shifting operations at times must be effected several times per minute, it is easily understood that the shifting can be a very tiresome and exacting work for the driver of a vehicle with manual gearbox.
In order to avoid the tiresome gear shifting, especially in buses and similar vehicles it has been commenced to replace the manual gearbox by an automatic one. The known automatic gearboxes, however, have the disadvantage that they increase the fuel consumption, in some cases by at least 10%.
The present invention, therefore, in principle has the object to provide a device, which facilitates the gear shifting of manual gearboxes substantially, and which further is constructed so as to render possible the pre-shifting of a higher or lower gear, semi-automatic or fully automatic shifting with manual gearboxes known per se, and which further is of such design that it can be mounted in a simple and easy manner, without much interference, even in existing vehicles, for example trucks, buses, passenger cars, tractors and other working vehicles with manual gearbox.
This object is achieved, in that the gear shifting device according to the present invention has been given the characterizing features defined in the attached claims.
The invention is described in greater detail in the following, with reference to the accompanying drawings, in which
FIG. 1 shows from above an embodiment of the gear shifting device according to the invention mounted in a vehicle with manual gearbox and coupled to its ordinary gear shift lever, for manual shifting or shifting with preselection of the gears,
FIG. 2 is a longitudinal section through the gear shifting cylinder of FIG. 1;
FIG. 3 is a section along the line III--III in FIG. 2,
FIG. 4 is a section along the line IV--IV in FIG. 2,
FIG. 5 is a section along the line V--V in FIG. 4,
FIG. 6 is a section through a coupling cylinder,
FIG. 7 is a schematic coupling diagram of the present gear shifting device for manual gear shifting or shifting with gear pre-selection of five or ten speed transmission,
FIGS. 8a-i show different positions for valves, pistons etc. comprised in the gear shifting device,
FIG. 9 is a schematic horizontal view of a second embodiment of the present gear shifting device mounted in a vehicle with manual gearbox and provided with a gear shifting device of its own for semiautomatic or fully automatic gear shifting,
FIG. 10 is a section through a distributor comprised in a gear shifting device according to FIG. 9,
FIG. 11 is a section along the line XI--XI in FIG. 10,
FIG. 12 is a section along the line XII--XII in FIG. 10,
FIG. 13 is a section along the line XIII--XIII in FIG. 10,
FIG. 14 is a section along the line XIV--XIV in FIG. 10,
FIG. 15 is a schematic view of a coupling diagram over the present gear shifting device according to the embodiment shown in FIGS. 9-14 for semiautomatic or fully automatic gear shifting of a five gear transmission,
FIG. 16 is a schematic view of the coupling diagram according to FIG. 15 adapted to a ten gear transmission,
FIG. 17 is a schematic view of a coupling diagram over the present gear shifting device adapted for passenger cars,
FIG. 18 is a schematic lateral view of a vehic
REFERENCES:
patent: 3298483 (1967-01-01), Morrison
patent: 3667577 (1972-06-01), Weymann
patent: 3945265 (1976-03-01), Bell et al.
patent: 4234066 (1980-11-01), Toyota et al.
patent: 4344514 (1982-08-01), Fujihara et al.
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