Electronic shift command system for motor vehicle automatic transmission
阅读：139发布：2022-01-13
专利汇可以提供Electronic shift command system for motor vehicle automatic transmission专利检索，专利查询，专利分析的服务。并且A Schmitt trigger circuit, the switching of which is used to command shifting of an automatic transmission from one gear to another or back again, is driven by a summing amplifier responsive to a voltage proportional to vehicle speed, to a voltage inversely proportional to motor loading as indicated by the position of the throttle and also to two-valued conditions related to actuation of a kickdown switch and of a shift range limiting selector switch. The circuit design and logic is such that with the Schmitt trigger operating at fixed switching thresholds, the vehicle speed of no load upshift, full load upshift, kickdown upshift, no load downshift, full load downshift and kickdown downshift can be respectively determined by the independent choice of value for individual resistors in the circuit. When more than one shift stage is involved summing amplifiers and Schmitt triggers must be duplicated, but a common speed signal source and a common load signal source may be used.，下面是Electronic shift command system for motor vehicle automatic transmission专利的具体信息内容。
1. An electronic control system for shifting an automatic transmission of the motor of a vehicle from one gear to another comprising: bistable switch means (46, 47, 49, 51, 52, 53) for commanding the shift of said transmission from a lower to a higher gear in going from a first to its two conditions to the second of its conditions (upshift), and vice versa (downshift); summing circuit means (31, 34, 29, 40) for controlling saiD switch means (46, etc.) having a plurality of signal input connections; means (36) for generating a voltage proportional to the speed of the vehicle to which said transmission belongs and supplying said voltage to said summing circuit means; a variable element (44) controlled in relation to the position of the throttle (50) of said motor and arranged to supply a signal to said summing circuit means; and circuit logic means (15, 16, 18, 19, 21, 22, 25, 26, 27, 28, 30, 35, 37, 38, 39, 41, 42) for causing said switching means (46, etc.) to switch and having electrically resistive components (28, 30, 37, 39) for setting by their electrical resistance the switching thresholds for at least the first two of the following conditions, to wit, full load upshift (64), full load downshift (72), kickdown upshift (68), and kickdown downshift (69), in which circuit logic means said thresholds are in each case determined by substantially independent circuit parameters provided by said resistive components (28, 30, 37, 39), in which the no load upshift condition is determined by the magnitude of a resistive component (40) of said summing circuit means, in which the no load downshift condition (67) and the no load hysteresis of said switch means (46, etc.) are determined by the magnitude of a hysteresis resistor (47), and in which means responsive to the condition of said switch means and that of said variable element and including one of said resistive components (30) are provided for causing the hysteresis of said switch means to vary with the position of said throttle (50), the magnitude of the last mentioned resistive component (30) serving to set the full load hysteresis of said switch means.
2. An electronic control system as defined in claim 1 in which said switch means includes an operational amplifier (46) connected to operate as a Schmitt trigger and having a first input connected to a fixed reference potential (51, 52) and a second input of polarity opposite to that of said first input connected to the output of a second operational amplifier (31) included in said summing circuit means and therein connected as a summing stage with a first input connected to a second fixed reference potential (32, 33) and a second input of polarity opposite to said first input, connected in multiple to the respective circuits of signals to be summed.
3. An electronic control system as defined in claim 2 in which said variable element (44) controlled in relation to the position of said throttle (50) is a variable resistance provided with a pull-up resistor of such value as to provide at the junction of said pull-up resistor and said variable resistor a potential under no load conditions (61) equal to said fixed potential connected to said first input of said operational amplifier (31) of said summing means (31, 34, 29, 40); in which, further, the series combination of said pull-up resistor (45) and said variable resistor (44) is connected between the positive (17) and negative (14) busses supplying electric potential to said system; and in which, further, the magnitude of said pull-up resistor (45) contributes to the determination of the full load downshift threshold (72) of said switch means, to which resistive components (28, 30) of said logic means respectively determinative of the full load upshift condition and the full load hysteresis of said switch means also contribute.
4. An electronic control system as defined in claim 3 in which said resistive components (28, 30) determinative of the full load upshift condition and the full load hysteresis of said switch means are adjustable.
5. An electronic control system as defined in claim 3 for use with a transmission having a transmission selector switch (11) of which one or more positions are connected respectively to actuate one or more transmission limiting contactors (12, 13) so connected in said circuit logic means as to prevent upshifting beyond a particular gear except under conditions corresponding to maximum permissible engiNe speed.
6. An electronic control system as defined in claim 5 in which said transmission limiting contactors (12, 13) are connected, in series with transmission limiting resistors (15, 16), respectively between opposite poles of the energizing voltage source of said electronic system and that the respective intermediate junctions are each connected to an input of a transmission limiting OR gate (18) of which the output is connected in multiple to a second (19) and a third (21) inverting gate and to a second OR gate (22), another input of which is connected to said kickdown contactor (24) and said kickdown resistor (25), in which further the output of said second inverting gate (19) is connected over a full load downshift (72) determining resistor (28) to said second input (29) of said second operational amplifier (31) of said summing means (31, 34, 29, 40) and also, over the collector-emitter path of a first transistor (26) to the junction of said variable resistor (44) and said pull-up resistor (45), in which further the output of said third inverting gate (21) is connected to the base of said first transistor (26) and in which further the output of said second OR gate (22) goes to said second input of said kickdown downshift gate (38) and to the input of said kickdown inverting gate (41).
7. An electronic control system as defined in claim 2 in which said resistive component (40) determinative of the no load upshift condition is a summing resistor connected between the second input of said second operational amplifier and a terminal of the energizing voltage source of said system.
8. An electronic control system as defined in claim 7 in which said resistive component (40) determinative of the no load upshift condition and said hysteresis resistor (47) are adjustable.
9. An electronic control system as defined in claim 1 for use in a vehicle having an accelerator pedal throttle control (23) in which a contactor (24) arranged to switch in a kickdown position of said accelerator pedal is connected in series with a kickdown resistor (25), said series combination of kickdown resistor and contactor (24, 25) being connected between opposite poles of the energizing voltage source for said control system and the junction of said contactor and said kickdown resistor being connected into said circuit logic means and in which system, further, means are provided for determination of the kickdown upshift threshold (68) of said switching means (46, etc.) comprising the series connection of an inverting gate (41) and a kickdown upshift resistor (39) connected directly or through other elements between said second input (29) of said second operational amplifier (31) of said summing means (31, 34, 29, 40) and said junction between said kickdown contactor (24) and said kickdown resistor (25).
10. An electronic control system as defined in claim 9 in which said kickdown upshift resistor (39) is adjustable.
11. An electronic control system as defined in claim 9 in which said circuit logic means includes means for determining the kickdown downshift threshold (69) of said switch means (46, etc.) comprising a kickdown downshift resistor (37) and a kickdown downshift gate (38), said kickdown downshift resistor being connected between said second input (29) of said second operational amplifier (31) of said summing means (31, 34, 29, 40) and said kickdown downshift gate (38) and in which said kickdown downshift gate (38) has a first input connected to the output of said switch means (46, etc.) and a second input connected directly or through other elements to said junction of said kickdown contactor (24) and said kickdown resistor (25).
12. An electronic control system as defined in claim 11 in which said kickdown downshift resistor (37) is adjustable.
13. An electronic control system as defined in claim 11 in which said circuit means includes a second transistor (27) having its emitter-collector path in series with the emitter to collector path of said first transistor (26) and in series with a resistor (30) so as to place said last-mentioned resistor (30) in parallel with said full load downshift resistor (28) when said second transistor (27) having its base connected to the output of a fourth inverting gate (42) the input of which is connected to the output of said switch means (46, etc.).
14. An electronic control system as defined in claim 9 in which said circuit logic means is adapted to cause said switching means (46, etc.) to switch for each of the following conditions, to wit, no load upshift (63), full load upshift (64), kickdown upshift (68), no load downshift (67), full load downshift (72) and kickdown downshift (69), in which circuit logic means the upshift and downshift thresholds are in each case determined by substantially independent resistor magnitudes (28, 30, 37, 39, 40).
15. An electronic control system for shifting an automatic motor vehicle transmission having more than two gears from one to another of successive gears in which control of shifting from each one of said gears to a successive gear in either direction of succession is a system as defined in claim 1 and in which the respective systems as defined in claim 1 utilize a common means (36) for generating a voltage proportional to the speed of the vehicle to which said transmission belongs and a common variable element (44) controlled in relation to the position of the throttle (50) of said motor.
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 一种基于逆变电路的液晶驱动方法 | 2020-05-08 | 863 |
| 智能割草机 | 2020-05-12 | 611 |
| 一种可编程的时钟相移电路 | 2020-05-12 | 122 |
| 一种高性能的振荡器 | 2020-05-08 | 823 |
| 一种抗辐照加固的施密特触发器 | 2020-05-08 | 626 |
| 一种基于磁耦合谐振的无线充电电路及无线充电系统 | 2020-05-11 | 545 |
| 基于施密特触发器的显示屏延迟装置 | 2020-05-11 | 374 |
| 一种电容式多层土壤温湿度检测装置 | 2020-05-12 | 765 |
| 一种双机热备冗余的音视频系统 | 2020-05-08 | 988 |
| 墨水屏阅读设备 | 2020-05-11 | 489 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。
分析报告
专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。
QQ群二维码
意见反馈
意见反馈