GB1360596A - Control means for change-speed mechanism - Google Patents
Control means for change-speed mechanismInfo
- Publication number
- GB1360596A GB1360596A GB2169070A GB2169070A GB1360596A GB 1360596 A GB1360596 A GB 1360596A GB 2169070 A GB2169070 A GB 2169070A GB 2169070 A GB2169070 A GB 2169070A GB 1360596 A GB1360596 A GB 1360596A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistor
- voltage
- circuit
- speed
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/74—Inputs being a function of engine parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/18—Inputs being a function of torque or torque demand dependent on the position of the accelerator pedal
- F16H59/20—Kickdown
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0206—Layout of electro-hydraulic control circuits, e.g. arrangement of valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
1360596 Change-speed control WILSON MILLER & CO Ltd 4 Aug 1971 [5 May 1970] 21690/70 Addition to 1201612 Heading F2D An electronic circuit, for initiating up and downshift of a change-speed, e.g. overdrive gear, on a motor vehicle driven by a spark-ignition I.C. engine comprises first and second circuits C1, R1 and C2 R2, producing voltage signals representing engine speed and torque respectively from pulses in the engine ignition circuit, applied at 4, which signals are applied in opposition to the base of a transistor TR1 forming one of a bi-stable pair TR1, TR2; controlling energization of a shift solenoid or electromagnetic valve 7, through a two-stage amplifier circuit TR3, TR4. A long time-constant provided by R1 C1 in the first circuit uses the square-wave make and break pulse of the ignition contact breaker to supply charging current related to engine speed to a capacitor C3, which, with the aid of pumping diodes D3, D4, and a leakage resistor R3, is charged to a voltage proportional to engine speed, the negative side of which is applied to the base of the transistor TR1, the emitter of which is biased negatively with respect to battery positive terminal 1 by a voltage divider R14, R16, R17, R18, across the battery terminals 1, 6, so that when the engine-speed negative signal exceeds emitter potential, TR1 conducts, causing conduction of TR2, TR3, TR4 to produce upshift. The much shorter time-constant of R2, C2 in the second circuit similarly charges a capacitor C4 from the high frequency transient at the ignition contact breaker, this charging voltage representing engine torque. The negative voltage of the capacitor C4 is applied to the emitter of TR1, whilst its positive voltage is applied through resistors R6, R7 to its base, this torque voltage being thus in opposition to the speed voltage from C3. A bias resistor R10 biases the torque signal on the emitter in accordance wth the direction of current flow in that resistor, bias being towards positive at low speeds and negative at high, so that greater torque increments are required to produce downshift at higher speeds, adjustment of a resistor R9 determining the current reversal point. In the TR1, TR2 circuit a resistor R11 renders the circuit bi-stable and also prevents hunting. Temperature compensation is provided by negative temperature characteristic resistors NTC1 and NTC2 arranged respectively near the ignition coil or engine, and in the circuit. Closure of a kickdown switch across terminals 2, 3 applies more positive potential to the base of TR1 through a resistor R5, producing downshift up to any desired speed. Connection of the terminal 2 to the capacitor-side of the resistor R4 would provide a delay in kickdown in accordance with the time required to reduce the charge in C3. An inhibitor switch, not shown, disables the automatic control in lower ratios of the main gear. The Specification also includes the kickdown switch forming the subject-matter of Specification 8484/74.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2169070A GB1360596A (en) | 1971-08-04 | 1971-08-04 | Control means for change-speed mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2169070A GB1360596A (en) | 1971-08-04 | 1971-08-04 | Control means for change-speed mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1360596A true GB1360596A (en) | 1974-07-17 |
Family
ID=10167214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2169070A Expired GB1360596A (en) | 1971-08-04 | 1971-08-04 | Control means for change-speed mechanism |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1360596A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4246805A (en) * | 1977-06-06 | 1981-01-27 | Fuji Heavy Industries Co., Ltd. | Drive range control for an automatic transmission |
US4488455A (en) * | 1981-09-02 | 1984-12-18 | Robert L. Shetler | Electronic shifting and ignition control system for motorcycles |
-
1971
- 1971-08-04 GB GB2169070A patent/GB1360596A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4246805A (en) * | 1977-06-06 | 1981-01-27 | Fuji Heavy Industries Co., Ltd. | Drive range control for an automatic transmission |
US4488455A (en) * | 1981-09-02 | 1984-12-18 | Robert L. Shetler | Electronic shifting and ignition control system for motorcycles |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3356082A (en) | Spark ignition circuit | |
US3823621A (en) | Vehicle automatic transmission control system | |
US3710651A (en) | Line pressure regulating system for automatic power transmission | |
GB1344150A (en) | Electronic control system for an automatic power transmission | |
ES310353A1 (en) | Methods and devices for automatic transmissions for vehicles | |
GB1429625A (en) | Digital engine control emthod | |
US4617890A (en) | Apparatus for controlling idling speed in internal combustion engine having two bypass air passages | |
SE322135B (en) | ||
SU1210655A3 (en) | Electronic system for controlling vehicle transmission | |
US3973537A (en) | Fuel supply systems for internal combustion engines | |
US3612017A (en) | System for automatically controlling vehicle speed | |
GB1356561A (en) | Transmission shift pattern generator | |
GB1362808A (en) | Fuel injection system incorporating shift shock preventing device | |
GB1360596A (en) | Control means for change-speed mechanism | |
GB1274403A (en) | Electronic control device for automatic power transmission | |
GB1158800A (en) | Means for Effecting Downward Gear-Change at will with Automatic Gearing for Motor Vehicles | |
GB1354718A (en) | Overdrive electronic control system | |
GB1379177A (en) | Device for automatically controlling a gearbox | |
GB1449909A (en) | Motor vehicle having a system for the control of the main pressure in an automatic gearbox | |
EP0040688A1 (en) | Supply-voltage-compensated contactless ignition system for internal combustion engines | |
US3124693A (en) | Pfiras | |
US3543734A (en) | Fuel injection systems | |
US3691873A (en) | Frequency-responsive control devices, notably for reducing the air pollution caused by petrol engines | |
US3900015A (en) | Spark ignition systems for internal combustion engines | |
JPH0562362B2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |