Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1990-04-12
1992-05-19
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74870, 74877, 3644241, B60K 3104
Patent
active
051137216
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a method of controlling the drive train of a motor vehicle equipped with an electronic engine power control which has an associated accelerator pedal for the actuation of a throttle valve or control rod, a brake pedal and an automatic transmission, e.g. an automatic gear shifting mechanism including an electronically controlled mechanical dry clutch, by means of operating data, characteristic values and parameters, with certain pedal movements being picked up as arbitrary gear shifting instructions from the driver.
The invention further relates to an apparatus for implementing such a method, the apparatus including at least one driving power reference value generator associated with and picking up the position of an accelerator pedal serving as the power control member. This reference value generator is connected with a processor control unit for determining a suitable gear and for automatically controlling gear changing processes, with moreover the input of the processor control unit being connected with a memory device for characteristic data of the motor vehicle, with at least one sensor associated with the brake pedal and with sensors for picking up operating data, such as the number of engine revolutions per minute, engine temperature, driving speed, clutch position and gear identification, while the output of the processor control unit is connected with an output circuit for actuating the transmission, the clutch and the engine throttle or control rod.
PRIOR ART
Automatic transmissions and automatic controls for the transmission or, more generally, the drive train of a motor vehicle equipped with an internal combustion engine are known in many configurations, see, for example, DE-A 2,811,574 or DE-A 3,526,671. Customarily, the known controls determine their gear shifting points, which sometimes are also adaptive, by the position of the throttle valve and the engine load as well as the number of revolutions of the driving or driven transmission shaft, with a memory associated with the electronic control, customarily a so-called ROM (read only memory - fixed value memory), storing the appropriate engine specific and vehicle specific data and characteristics. It is also known to provide a so-called driving mode setting device for providing a driving mode parameter for a more consumption optimized or a more performance oriented driving mode. By means of a shift lever it is additionally possible to block the higher gears or to hold the lowest gear.
With respect to a value indicating the driving mode, EP-A 0,144,608 has already proposed to calculate in a processor, on the basis of cyclical sampling of the accelerator pedal positions and the thus obtained accelerator pedal signal values, an accelerator pedal activity indicating the driving style of the respective driver and also the driving situation. This accelerator pedal activity information is then also considered in the determination of the threshold values for the shifting processes.
On the other hand, also known is an electronic engine power control in which the "electronic" accelerator pedal serves as the power control member whose position is picked up by a sensor, the reference value generator for the driving power, and converted into a corresponding electrical signal. This accelerator pedal position signal is fed, customarily together with further sensor signals such as, in particular those which contain informations about the number of engine revolutions per minute, the driving speed, the identification of the momentarily employed gear, the engine temperature and similar operating data, by way of an input circuit in which, for example, the signals are converted from analog to digital and are processed accordingly, to a microprocessor which then, on the basis of these signals, actuates by way of an output circuit including an electronic power system, an electrical servomotor which actuates the throttle or the injection pump adjustment lever or the control rod. Such an electronic system can also
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Auto Polly Gesellschaft M.B.H.
Braun Leslie A.
Stavish Matthew
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