CZ200868A3 - Device eliminating undesired rearward driving of vehicles - Google Patents

Abstract

The device for eliminating unwanted reversing of vehicles comprises means (4) for measuring the reduced weight, which transmits the measured values to the multiplication block (7) into which the acceleration measuring means (5) also transmits the information. The output of the multiplication block (7) is the accelerating force value (F2), which is passed to the addition block (8), into which the tractive force value (F1) is also transmitted from the traction force measuring means (F1) which is also sold to a comparator (9), into which the driving resistance force (F3) is output, which is the output of the adder block (8). The comparator output (9) is a comparison of the tractive force (F1) with the driving resistance force (F3), this comparison being fed to the logic product member (10), into which the value of the velocity evaluation means (6) is also applied. The logic product member (10) outputs the brake activation logic (AB). The measured value of the reduced weight measuring device (4) is the sum of the value measured by the weight measuring means (2) and the measured value of the reduced mass measuring means (3).

Description

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for eliminating undesired reversing of vehicles, in particular with an electric drive in the region of low speeds due to driving resistances.

BACKGROUND OF THE INVENTION

In the low speed range when stopping and starting the vehicle on a non-zero track slope, the vehicle reverses undesirably, since the vehicle resistances on the slope of the track are estimated by the vehicle operator and therefore low speed speeds may occur undesired reversing of the vehicle. The coordination of the forces between the vehicle drive and the vehicle brake, without the attendance of the vehicle operator, in the low speed range with the aim of eliminating undesired vehicle reversing on the track at an incline has not yet been addressed in vehicles, especially with electric drive.

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2. Summary of the Invention

SUMMARY OF THE INVENTION It is an object of the invention to ensure that, without the operator's participation, the vehicle is able to move against zero inclination or acceleration greater than zero, within the range of physical possibilities, around zero speed. This object was solved by a device eliminating undesired reversing of vehicles according to the invention. It is an object of the invention that the device comprises a reduced weight measuring means which transmits the measured values to the multiplication block. The acceleration measuring means is also transmitted to the multiplication block. The output of the multiplier blocks the value of the accelerating force that is transmitted to the addition block. The tensile force value from the tensile force measuring means is also transferred to the addition block, which is also passed to the comparator. The value of the driving resistance force, which is the output of the addition block, is also transferred to the comparator.

The output of the comparator is a comparison of the tractive force with the force of the driving resistance.

The comparison of the traction force with the force of the driving resistors is passed to the logic product, to which the value from the non-prime speed evaluation means is also passed. The output of the logic product is a brake activation logic signal. It is preferred that the value measured by the means for measuring the reduced mass is comprised of the sum of the value measured by the means for measuring the weight and the value measured by the means for measuring the reduced weight of the rotating masses.

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BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated in more detail by way of example with reference to the accompanying drawing, in which a device for eliminating undesired reversing of vehicles is shown schematically.

An example of the invention

The vehicle reversing device comprises a reduced mass measuring means 4 which transmits the measured reduced mass of the vehicle m3 to the multiplication block 7. The acceleration measuring means 5 transmits the measured acceleration value as well as the multiplying block 7. As a result of multiplying the reduced vehicle mass m3 and the acceleration value according to Newton's second law of motion, the value of the accelerating force F2, which is the output of the multiplication block 7 and is passed to the census block 8. The value of the tensile force F1 from the tensile force measuring means L is also passed to census block 8. forces resistance F3. The output of comparator 9 is a comparison of the tractive force F1 with the force of the driving resistors F3 and in the case that the tractive force F1 is less than the force of the driving resistors. F3, activates this logic signal FK F3 via a logic product member 10 that outputs a logic signal AB, which is the activation of the logic signal AB, which is the activation of the logic signal AB. * Brake * Brake * Brake * Brake * Brake * Brake * Brake * Brake * Brake * Brake * Brake * Brake *. The brake is activated even if the output of means for evaluating the speedless speed 6 is a logical signal v <0 - the speed is not positive, which means that its value is zero or negative, and this signal is also passed to the logic product K) . The tensile logic signal F1 is less than the driving resistive force F3 and the logic speed signal v <by the logic product 10, actuates the brake without the operator's intervention by the logical signal AB in all cases where undesired reversing of the vehicle may occur.

The tensile force measuring means 1, the acceleration measuring means 5 and the non-rapid speed evaluation means 6 of electric vehicles are usually provided by a traction converter which calculates the instantaneous acceleration value of the vehicle by processing the signal from the speed sensors. and evaluates the quick speed of the vehicle. The weight measuring means 2 may be realized by sensors which evaluate the deformation of the secondary parrying of the vehicle, which is proportional to the vehicle load. The means for measuring the reduced mass of the rotating masses 3 may be formed by the on-board computer of the vehicle, in the permanent memory of which the value of the reduced mass of the rotating masses is stored. In the on-board computer, the reduced mass measurement means 4, the multiplication block 7, the addition block 8, the comparator 9 and the logic product 10 may also be implemented by an appropriate algorithm.

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-5Industrial applicability

The device eliminating undesired reversing of vehicles according to the invention can be used in particular in electric vehicles.

Claims (2)

PATENT CLAIMS A device for eliminating undesired reversing of vehicles, characterized in that it comprises means for measuring the reduced weight (4), which transmits the measured values to the multiplication block (7), to which also the means for measuring acceleration (5) (7) is the value of the accelerating force (F2), which is transmitted to the addition block (8), to which also the value of the tractive force (F1) from the tractive force measuring means (1), which is also transferred to the comparator (9) ), to which the value of the driving resistance force (F3), which is the output of the addition block (8), is also transmitted, the output of the comparator (9) being a comparison of the traction force (F1) with the driving resistance force (F3). to a logic product (10), to which a value from the non-rapid rate evaluation means (6) is also fed, and the output of the log member The product (10) is a logic brake activation signal (AB). Device according to claim 1, characterized in that the measured value by the means for measuring the reduced mass (4) is the sum of the value measured by the means for measuring the weight (2) and the value measured by the means for measuring the reduced weight of the rotating masses (3).