CZ303178B6 - Method of eliminating undesired rearward driving of vehicles - Google Patents

Abstract

The invented method of eliminating undesired rearward driving of vehicles is characterized in that the vehicle comprises means (4) for measuring reduced weight, which means transmits the measured values to a multiplication block (7) in which also information of an acceleration measuring means (5) is transmitted. The multiplication block (7) output is a value of accelerating force (F2), which is transmitted to an adding block (8). A tractive force value (F1) obtained from a tractive force measuring mans (1) is transmitted not only in the adding block (8) but also to a comparator (9), which is also supplied with a driving resistance force value (F3) being output of the adding block (8). The comparator (9) output is comparison of the tractive force (F1) with the driving resistance force (F3), whereby such comparison is transmitted to an AND element (10) in which also a value from a means (6) for evaluation of negative velocity is supplied. The output of said AND element (10) is a logical signal (AB) of brake activation. The value measured by the means (4) for measuring reduced weight consists of the sum of the value obtained from a weight measuring means (2) and a value measured by a means (3) for measuring reducing weight of rotational masses.

Description

Method of elimination of unwanted reversing of vehicles

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a method of eliminating undesired reversing of vehicles, in particular with an electric drive in the low speed range due to driving resistances.

The state of these titles is also present

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. Coordination of the forces between the vehicle drive and the vehicle brake, without the attendance of the vehicle operator, in the area of low speeds with the aim of eliminating undesired reversing of the vehicle on the track inclined is not yet solved in vehicles, especially electric vehicles.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to ensure that, without physical attendance, the vehicle is able to move within zero-acceleration or zero-acceleration of the track within the range of physical possibilities around zero speed. This object is solved by a method of eliminating undesired reversing of vehicles according to the invention. It is an object of the present invention that the vehicle comprises a reduced mass 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 block is the value of the accelerating force that is transmitted to the addition block. The tensile force note from the tensile force measuring means, which is also transmitted to the comparator, is also transmitted to the addition block. 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 logic brake activation 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.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated in more detail with reference to the accompanying drawing, in which an apparatus for performing a method of eliminating undesired reversing of vehicles according to the invention is schematically illustrated.

DETAILED DESCRIPTION OF THE INVENTION

The apparatus for performing a vehicle reversal elimination method comprises a reduced mass measuring means 5 which transmits the reduced mass measured value m3 of the vehicle to the multiplication block 7. The acceleration measuring means 5 transmits the measured acceleration value as well as the multiplying block 7. the acceleration force F2, which is the output of the multiplication block 7 and is passed to the addition block 8. The value of the traction force F1 from the traction force measuring means 1 is also passed to the addition block 8. The output of the summation block 8 is the value of the force of the driving resistances F3, which is transmitted to the comparators 9, to which the value of the traction force F1 from the traction force measuring means 1 is also transmitted. The output of the comparators 9 is a comparison of the traction force F1 with the force of the driving resistances F3, and if the traction force F1 is less than the force of the driving resistances F3, it activates this logic signal F1 <F3 via the logic product 10. is brake activation. The brake is actuated when the non-rapid speed evaluation means 6 is a logic signal at < 0, so that the speed is not positive, which means that its value is zero or negative and this signal is also passed to the logic product JO. The traction logic signal EL is less than the driving resistive force F3 and the logic speed signal v <0 reliably, by means of the logic product 10, actuates the brake with the logical AB signal in all cases where undesired reversing of the vehicle can occur.

The traction force measuring means 1, the acceleration measuring means 5, and the non-instantaneous speed measuring means 6 for electric vehicles are usually provided by a traction converter which calculates the instantaneous acceleration value of the vehicle by processing the rpm sensor signal. evaluates the vehicle's low speed. The weight measuring means 2 may be realized by sensors which evaluate the deformation of the secondary suspension of the vehicle, which is proportional to the vehicle load. The means for measuring the reduced mass of the rotating masses may be constituted 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 adder block 8, the comparator 9 and the logic product LO may also be implemented by an appropriate algorithm.

Industrial applicability

The method of eliminating undesired reversing of vehicles according to the present invention can be particularly useful in electric vehicles.

Claims (2)

Method for eliminating undesired reversing of vehicles, characterized in that the vehicle comprises means (4) for measuring the reduced weight, which transmits the measured values to the multiplication block (7), to which also the acceleration measuring means (5) block (7) is the value of the accelerating force (F2), which is passed to the census block (8), to which also the value of the traction force (F1) from the traction force measuring means (1) is also passed to comparators ( 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 comparators (9) being a comparison of the traction force (F1) with the driving resistance force (F3). fed to a logic product (10), to which is also supplied a value from the non-rapid rate evaluation means (6) and the output of the member (10) The logic product is the brake activation logic (AB). Method according to claim 1, characterized in that the measured value of the reduced weight measuring means (4) is the sum of the value measured by the weight measuring means (2) and the value measured by the reduced mass measuring means (3) of the rotating masses.