CA1076677A - Apparatus for control of operation of overdrive mechanism in vehicle - Google Patents
Apparatus for control of operation of overdrive mechanism in vehicleInfo
- Publication number
- CA1076677A CA1076677A CA241,646A CA241646A CA1076677A CA 1076677 A CA1076677 A CA 1076677A CA 241646 A CA241646 A CA 241646A CA 1076677 A CA1076677 A CA 1076677A
- Authority
- CA
- Canada
- Prior art keywords
- throttle
- switch
- switch member
- vehicle
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention provides an apparatus for control of the operation of an overdrive mechanism which may be selective-ly operated, in a vehicle driven by an internal combustion engine having a throttle, said apparatus comprising a detection switch including a first switch member responsive to the running speed of the vehicle and a second switch member responsive to the open degree of the throttle of the engine, the overdrive mechanism being of the type adapted to be selected automatically to be in its operative condition when the detection switch is operated.
The present invention provides an apparatus for control of the operation of an overdrive mechanism which may be selective-ly operated, in a vehicle driven by an internal combustion engine having a throttle, said apparatus comprising a detection switch including a first switch member responsive to the running speed of the vehicle and a second switch member responsive to the open degree of the throttle of the engine, the overdrive mechanism being of the type adapted to be selected automatically to be in its operative condition when the detection switch is operated.
Description
10~ i7 ~' The present invention relates to an operation control apparatus whereby, in an arrangement of the type that a vehicle such as a motorcar which is driven by an internal combustion engine is provided with an overdrive mechanism, the mechanism may be controlled to be changed over between its operative and inoperative conditions.
It has hitherto been usual that this type of apparatus comprises a manually operated member such as a manual lever and thus the selection of either of the operative and inoperative conditions of the mechanism is manually effected. Such handling is troublesome and is inconvenient.
The present invention provides a control apparatus which is free from the foregoing disadvantages such that changeover control may be automatically effected in accordance with a relationship between a vehicle speed and degree of opening of the engine throttle.
According to the present invention there is provided an apparatus for control of the operation of an overdrive mechanism which may be selectively operated, in a vehicle driven by an internal combustion engine having a throttle, said apparatus comprising a detection switch including a first ~ switch member movable along a first path in response to the running speed of the vehicle and a second switch member coupled to said throttle so as to be movable along a second path in response to the open degree of the throttle of the engine, the movement of said members along said paths being arranged so that, when said running speed of the vehicle and said open degree of the throttle have a predetermined relationship, said switch members are in mutual engagement, and the overdrive mechanism being adapted to be put in its operative condition by said mutual engagement of said switch members, whereby said overdrive is operated automatically when said open degree 107ti~7 of said throttle and said running speed hav~ said predetermined relationship.
The present invention will be further illustrate~
by way of the accompanying drawings in which Fig. 1 is a constructional diagram of an apparatus for control of an overdrive in accordance with one embodiment of the present invention, Fig. 2 is a sectional side view of a detection switch portion of the apparatus of Fig. 1, Fig. 3 is a sectional plan view of a portion of the switch of Fig. 2, and Fig. 4 is a graph explaining the operation of the apparatus of Fig. 1.
The overdrive mechanism 1 is of the type which may be put into its operative condition by closing of a corn clutch la according to a supply of pressure oil. For controlling such supply of pressure oil, a circuit 6 connecting the mechanism with an exterior oil pressure source 5, such as an oil pressure pump, is provided with a solenoid valve 9 which is movable to the left in the drawing against the action of a spring 8 to open the circuit 6 when the operation solenoid 7 is energized. Thus, when the operation solenoid 7 is energized according to the operation of the detection switch 4, the circuit 6 is opened so that the mechanism 1 may be supplied therethrough with pressure oil and be brought into its operative condition.
Valve 9 is in a normal condition retracted to the right as shown in the drawing by the pushing action-of the spring 8 to open an exhaust opening 10, and thus the pressure oil within the mechanism 1 is discharged therethrough to an external tank and the mechanism 1 is kept in its inoperative condition.
An operation electric source 11 is connected to the operation solenoid 7, and there is interposed there between an operation switch 4a which is arranged to be closed by the operation of the detection switch 4.
A first switch member 2 and a second switch member 3 are housed in a frame housing 12 so as to be coaxially with one another. As shown in Figs. 2 and 3, a permanent magnet rotary disk 15 connected through a gear train 14 to a rotary shaft 13 which rotates in response to the vehicle speed is provided at a lower position in the frame housing 12, and a dish-shaped :
,, ,: . .
10'7~677 induction plate 16 cooperating therewith is provided above the rotary disk 15 so as to be turnable against the action of a return spring 18. The first switch member 2 at the outer periphery thereof projects in a segmental plate, and a rotatable frame 19 is provided above the induction plate 16 so as to be substantially coaxial therewith. The frame 19 is connected through a throttle wire 20 to the throttle valve of an external engine. The second switch member 3 which is, for instance, in the form of a channel in cross section is provided on the frame 19 so as to project therefrom and be positioned over a rotary locus of the first switch member 2. Thus, the first switch member 2 turns in a clockwise direction as the vehicle speed increases and the second switch member 3 gradually turns also in the clockwise direction as the opening degree throttle increases, so that at every time when the vehicle speed and the open degree of the throttle have a predetermined relationship with each other, the two members 2 and 3 are always in their overlapping position and this is detected, that is, the detection switch 4 is operated. It is desirable in this case that the switch 4 is of the type that the same has an ON-OFF
hysteresis as shown lines A and A' in Fig. 4. Additionally, in the case where the use of the overdrive mechanism 1 is unnecessary, it may be enough that a pressure source is provided and is so set in its OFF position that the mechanism 1 never be operated even by the operation of the detection switch 4.
The operation thereof will now be explained as follows:
When the opening degree of the engine throttle and the vehicle speed are brought into a predetermined corelation- ' ship, this is detected by the detection switch 4 and the over-drive mechanism 1 is automatically selected to be its operative condition. This is shown, for instance, in Fig. 4 where the 107~77 overdrive mechanism 1 is in its operative condition in the area on the right side of the line A and in its inoperative condition in the area on the left side of the line A', and this is automatically repeated.
Thus, according to this invention, the predetermined relationship between the vehicle speed and the open degree of the engine throttle is detected by the detection switch 4 and this detection causes the overdrive mechanism 1 to be automatically r changed over to its operative condition. Accordingly, the foregoing disadvantages in the conventional manual handling can be reroved.
.
It has hitherto been usual that this type of apparatus comprises a manually operated member such as a manual lever and thus the selection of either of the operative and inoperative conditions of the mechanism is manually effected. Such handling is troublesome and is inconvenient.
The present invention provides a control apparatus which is free from the foregoing disadvantages such that changeover control may be automatically effected in accordance with a relationship between a vehicle speed and degree of opening of the engine throttle.
According to the present invention there is provided an apparatus for control of the operation of an overdrive mechanism which may be selectively operated, in a vehicle driven by an internal combustion engine having a throttle, said apparatus comprising a detection switch including a first ~ switch member movable along a first path in response to the running speed of the vehicle and a second switch member coupled to said throttle so as to be movable along a second path in response to the open degree of the throttle of the engine, the movement of said members along said paths being arranged so that, when said running speed of the vehicle and said open degree of the throttle have a predetermined relationship, said switch members are in mutual engagement, and the overdrive mechanism being adapted to be put in its operative condition by said mutual engagement of said switch members, whereby said overdrive is operated automatically when said open degree 107ti~7 of said throttle and said running speed hav~ said predetermined relationship.
The present invention will be further illustrate~
by way of the accompanying drawings in which Fig. 1 is a constructional diagram of an apparatus for control of an overdrive in accordance with one embodiment of the present invention, Fig. 2 is a sectional side view of a detection switch portion of the apparatus of Fig. 1, Fig. 3 is a sectional plan view of a portion of the switch of Fig. 2, and Fig. 4 is a graph explaining the operation of the apparatus of Fig. 1.
The overdrive mechanism 1 is of the type which may be put into its operative condition by closing of a corn clutch la according to a supply of pressure oil. For controlling such supply of pressure oil, a circuit 6 connecting the mechanism with an exterior oil pressure source 5, such as an oil pressure pump, is provided with a solenoid valve 9 which is movable to the left in the drawing against the action of a spring 8 to open the circuit 6 when the operation solenoid 7 is energized. Thus, when the operation solenoid 7 is energized according to the operation of the detection switch 4, the circuit 6 is opened so that the mechanism 1 may be supplied therethrough with pressure oil and be brought into its operative condition.
Valve 9 is in a normal condition retracted to the right as shown in the drawing by the pushing action-of the spring 8 to open an exhaust opening 10, and thus the pressure oil within the mechanism 1 is discharged therethrough to an external tank and the mechanism 1 is kept in its inoperative condition.
An operation electric source 11 is connected to the operation solenoid 7, and there is interposed there between an operation switch 4a which is arranged to be closed by the operation of the detection switch 4.
A first switch member 2 and a second switch member 3 are housed in a frame housing 12 so as to be coaxially with one another. As shown in Figs. 2 and 3, a permanent magnet rotary disk 15 connected through a gear train 14 to a rotary shaft 13 which rotates in response to the vehicle speed is provided at a lower position in the frame housing 12, and a dish-shaped :
,, ,: . .
10'7~677 induction plate 16 cooperating therewith is provided above the rotary disk 15 so as to be turnable against the action of a return spring 18. The first switch member 2 at the outer periphery thereof projects in a segmental plate, and a rotatable frame 19 is provided above the induction plate 16 so as to be substantially coaxial therewith. The frame 19 is connected through a throttle wire 20 to the throttle valve of an external engine. The second switch member 3 which is, for instance, in the form of a channel in cross section is provided on the frame 19 so as to project therefrom and be positioned over a rotary locus of the first switch member 2. Thus, the first switch member 2 turns in a clockwise direction as the vehicle speed increases and the second switch member 3 gradually turns also in the clockwise direction as the opening degree throttle increases, so that at every time when the vehicle speed and the open degree of the throttle have a predetermined relationship with each other, the two members 2 and 3 are always in their overlapping position and this is detected, that is, the detection switch 4 is operated. It is desirable in this case that the switch 4 is of the type that the same has an ON-OFF
hysteresis as shown lines A and A' in Fig. 4. Additionally, in the case where the use of the overdrive mechanism 1 is unnecessary, it may be enough that a pressure source is provided and is so set in its OFF position that the mechanism 1 never be operated even by the operation of the detection switch 4.
The operation thereof will now be explained as follows:
When the opening degree of the engine throttle and the vehicle speed are brought into a predetermined corelation- ' ship, this is detected by the detection switch 4 and the over-drive mechanism 1 is automatically selected to be its operative condition. This is shown, for instance, in Fig. 4 where the 107~77 overdrive mechanism 1 is in its operative condition in the area on the right side of the line A and in its inoperative condition in the area on the left side of the line A', and this is automatically repeated.
Thus, according to this invention, the predetermined relationship between the vehicle speed and the open degree of the engine throttle is detected by the detection switch 4 and this detection causes the overdrive mechanism 1 to be automatically r changed over to its operative condition. Accordingly, the foregoing disadvantages in the conventional manual handling can be reroved.
.
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An apparatus for control of the operation of an overdrive mechanism which may be selectively operated, in a vehicle driven by an internal combustion engine having a throttle, said apparatus comprising a detection switch including a first switch member movable along a first path in response to the running speed of the vehicle and a second switch member coupled to said throttle so as to be movable along a second path in response to the open degree of the throttle of the engine, the movement of said members along said paths being arranged so that, when said running speed of the vehicle and said open degree of the throttle have a predetermined relationship, said switch members are in mutual engagement, and the overdrive mechanism being adapted to be put in its operative condition by said mutual engagement of said switch members, whereby said overdrive is operated automati-cally when said open degree of said throttle and said running speed have said predetermined relationship, said first switch member being mounted on an induction plate co-operating with a magnetic rotary disk adapted to rotate with said engine, said induction plate being biassed into a normal position such that, as said engine speed increases, said rotary disk causes said induction plate to rotate away from said normal position against said bias and thereby move said first switch member along said first path, and said second switch member being directly coupled to said throttle by means of a cable.
2. An apparatus as claimed in claim 1 wherein said first and second switch members are movable along respective arcs of a circle.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15036674 | 1974-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1076677A true CA1076677A (en) | 1980-04-29 |
Family
ID=15495412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA241,646A Expired CA1076677A (en) | 1974-12-13 | 1975-12-12 | Apparatus for control of operation of overdrive mechanism in vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1076677A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4573375A (en) * | 1982-02-10 | 1986-03-04 | Nissan Motor Company, Limited | Control system and method for automatic transmission for automotive vehicle |
-
1975
- 1975-12-12 CA CA241,646A patent/CA1076677A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4573375A (en) * | 1982-02-10 | 1986-03-04 | Nissan Motor Company, Limited | Control system and method for automatic transmission for automotive vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| AU8713275A (en) | 1977-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0145117A3 (en) | Valve device incorporating a switching mechanism | |
| US4060063A (en) | Throttle positioner | |
| JPS6429633A (en) | Throttle opening controller for vehicle | |
| JPH0267434A (en) | Throttle controller | |
| US4768483A (en) | Throttle valve control apparatus for an automobile | |
| JPH02204641A (en) | Throttle controller | |
| US4872435A (en) | Throttle valve controlling apparatus including relative position limiting means for throttle valves | |
| CA1076677A (en) | Apparatus for control of operation of overdrive mechanism in vehicle | |
| JPS60240835A (en) | Control device of intake air quantity in internal-combustion engine | |
| JPH02204642A (en) | Throttle controller | |
| US4385675A (en) | Speed control actuator | |
| US4776563A (en) | Throttle body control arrangement | |
| JPS5656914A (en) | Arrangement for intake valve of engine | |
| JPS57110740A (en) | Engine speed controlling apparatus | |
| US4001529A (en) | Percentage timer | |
| US3444950A (en) | Vehicle speed governor | |
| US2304862A (en) | Variable speed transmission mechanism and automatic control therefor | |
| US4534237A (en) | Shift controller | |
| US3733972A (en) | Servomotor | |
| JPH03282054A (en) | Operation device for automatic transmission for vehicle | |
| US6085722A (en) | Exhaust restrictor with gear motor actuator and method of controlling same | |
| JPS6053622A (en) | Actuator | |
| JPH061863Y2 (en) | Automatic constant speed device | |
| JPS5442535A (en) | Air fuel ratio changer for electronically controlled fuel injection engine | |
| GB978190A (en) | Improvements in or relating to automatically controlled variableratio power transmission systems for vehicles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |