JPS62233803A - Program type electronic controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a programmable child controller for vehicle width.

The controller functions, for example, for brake slip control and/or traction slip control and contains electronic circuitry. The control signals of this circuit, for example the brake pressure control signal, are generated in response to the measured signals according to a preset program stored in the microprocessor or microcomviator in conjunction with internal and/or external memory.

An electronic controller programmed in this way is known from West German published patent application DI-O 8323463,7. This related controller is one for anti-lock braking systems. This known controller generates a brake pressure control signal as a function of sensor signals and/or measurement signals. These signals reflect the speed and rotational status of the wheels.

One embodiment of the controller described in the above-mentioned publication is provided with a micro combinator in which a controller program is permanently stored.

A microcomputer consisting of a single element and into which a controller program can be introduced using a mask program is relatively inexpensive.

However, the following problems still exist.

This means that virtually every type of vehicle requires a controller program with special parameters and individual program steps. The reason for this is that during slip control, the optimal variation of pressure depends on the type of drive, i.e. front-wheel drive, rear-wheel drive, or four-wheel drive, as well as on brake design and other structural variables. This is because it is influenced by the characteristics.

Furthermore, various special equipment, special reactions to special disturbances, etc. are required. Existing sensor types, such as wheel sensors, must also be taken into account through appropriate program design. As a result, special microcombinators have to be developed for each different program, which significantly increases production and stock costs.

It is therefore an object of the invention to provide a programmable electronic controller that can be applied in a simple manner and at low cost to different types of vehicles and to different requirements.

The objects of the invention can be realized in a technologically advanced and simple manner by controller means of the type described above.

A special feature of this is that a general program can be stored in the memory and such a program can be adapted to different applications and/or designs of systems such as braking systems, which program can be used in the controller described above. In the summer, such controllers are provided with an adapter circuit, which can be changed during the manufacturing process of the controller. Furthermore, this adapter circuit allows the program to be adapted to specific applications and design values.

Therefore, according to the invention, a controller designed for different types of vehicle widths, brake systems or brake designs can be integrated into one (or several) homogeneously programmed circuits, e.g. It can be attached to a chip microcomputer. Adaptation of the controller to the respective application is achieved by extremely simple and inexpensive adapter circuits. Such circuits can be modified at minimal cost. Thus, when the controller is manufactured, a desired program for a particular type of vehicle can be initialized, for example by interrupting or drilling conductive paths.

According to one embodiment of the invention, the above-mentioned adapter circuit is provided with a Blitzno circuit or a resistor network, by which the microb can detect the potential at the input of the processor, the microcombinator and/or the memory input. ), and the desired set of programs can be selected. According to another embodiment of the invention, the coder and switch network is provided as an adapter circuit, by means of which the adaptation instructions are executed at specific times or predetermined points in the running program. These can be applied to microprocessor, microcombinator and/or memory inputs.

During the rest of the time, the processor computer and memory inputs can be used to receive and pass other information.

The above-mentioned West German published patent number DE-O83234637
The controller described in the issue is equipped with two parallel-connected microcombinations, and the rotor is exchanged between them according to a program. In particular, the flow of data is checked for consistency, and such consistency is evaluated as a criterion for proper functional operation. For this type of circuit and similar circuits, another embodiment is provided according to the invention, in which a coder and a switch network are connected to a data exchange line and/or a data conversion bus. There is. As a result, this data exchange bus existing between these two microprocessors can be used to realize the connection of the adapter circuit. Therefore, compared to the case of conventional controllers, the required additional costs can be limited to an additional and very simple coder and switch network.

The present invention will be described in detail below with reference to the drawings.

First, in the embodiment shown in FIG. 1, the anti-lock brake system controller has two
Micro combinators 1#2 (MC1, MC2) are provided. Via bus 3゜4, signals are sent to these two
It can be supplied to the inputs of two microcombiners 1 and 2.

These signals are the wheel sensor S! ~S4, which can be obtained, for example, by individual sensors and evaluated by the trigger circuit 5. The inputs of these two microcomputers 1 and 2 are connected in parallel. Both inputs therefore receive the same information, in particular regarding the rotational state of the individual wheels.

In one micro combiator 1, all inputs and previous reports are logically synthesized and processed under a preset program stored in this micro combiator. The brake pressure control signals are finally fed to the output A1 of the microcomputer 1, which feeds these signals via the line system 6 and line 8 of the booster circuit 7 to the brake pressure control pulse f9. These pulps (usually multidirectional pulps that can be actuated electromagnetically) reduce the brake pressure during wheel braking of the slip control wheel, maintain it at a constant level, and after a while increase it again.
This prevents the wheels from locking, maintains a safe driving condition, and makes the brakes on the wheels as effective as possible with a short braking distance. The so-called
The main pulp is also provided within this pulp arrangement 9. This main pulp conventionally returns the pressure fluid into the brake circuit and thereby replenishes the volume of this pressure fluid that has been discharged during the pressure reduction.

In the controller circuit shown in FIG. 1, the sensor signal processed by the trigger circuit 5 is processed by the second microcomputer 2 in a similar manner. In particular, this method is performed using the same program in the micro combinator 1 described above. The signal generated by this microcombinator 1 is returned to the output A2 of the second microcomputer 2 after passing through the booster 7 via the line system 10 and the adaptation step 11. Furthermore, these two
data exchange bus 27
connected to each other by. Due to such an interconnection, the external and internal signals of these two microcomputers 1, 2 can be permanently compared. If these signals do not match, this indicates an error.

In this case, why is the slip control in the monitor circuit (
(not shown) and that normal operation, ie uncontrolled braking operation, continues to be possible.

Also, in the embodiment of FIG. 1, an adapter circuit is connected to the data exchange bus 27. This adapter circuit is essential to the invention and is part of the coder and switch circuit 12.
．． It is 13. This coder network 12 consists in this example simply of a series of ohmic resistors R and/or R2-R8 connected in parallel. In addition, these resistors are connected to the voltage source UB through a common 2-in 14.
It is also connected to Sharn via a common line M. Each of these resistors R1 to R8 is connected to an open switch IL provided inside the switch network 13.
It is connected to the conductor of the data exchange bus via ISA@.

A resistor R pre-connected to the ground conductor M in the kneader network 12 for coding the adapter circuit 12.13.
In this example, the resistors R1 to R8 are provided in the printed circuit, so that the separation of the connecting wire to the line M pierces the conductive strip of the connection. Possibly (holes 15.16, 17.18
), can be achieved in an extremely simple way.

Therefore, the switch al-a of the switch network 13
When closing n, the individual conductors of the data exchange bus 27 (
conductor) to the chassis via the coder network 12 or via resistors R1 to R8 to the voltage source +U! Connect to l. In the example shown, the voltage is switched to switch a
l, lL3. lL4 and a7, and during this time switches a2+a5+a6 and a8 are connected to the ground wire MK.
Connecting. As a result, instructions fixedly preset by the coding action of the coder network 12 are supplied to the microcomputers 1 and 2 via the data exchange bus 27 via the switch network 13 . In this example, eight switches and connection lines are provided, so a total of 256 combinations are possible. As a result, the coder and switch networks 12 and 13 with 256 types of instructions can be used.

Via the control connections 19-20, the switch network 13 is activated at any instant, thereby
Instructions preset by the coding of the coder network 12 (in the example shown, given in the form of 8-bit data words) are supplied to the data exchange bus 27 .

In the controller shown in FIG. 1, two microcomputers 1 and 2 are connected to each other via a data exchange link 27. Through this, in particular, signals are compared for consistency with corresponding data processed by other microcomputers.

These signals represent, for example, the preliminary results of the data processed in the microcombinator 1 or 2.

FIG. 2 shows a program run when the adapter network 12 shown in FIG. 1 is used. When the control instruction 21 is applied to the switch network I J (see diagram M1), the switches ILI~a8 are closed and thereby connected to the coder network 12. This is represented by program step 22 in FIG. In this example,
determined by the coding action of network 12. Instructions are sent to data exchange bus 27 in the form of 8-bit data words.

The result is shown at 24 in FIG. 2, and a particular parameter, a particular program step, or other coefficient can be selected. These may affect the operation of the controller program stored in the microcomputer 1.2. For example, the period of pressure decrease or pressure increase in any control phase can be determined by the instruction '/a' coded in network 12. The controller program can also be adapted to changing front-wheel drive, rear-wheel drive, or four-wheel drive conditions. For example, by combining the pressure increase time, etc., the instantaneous effect of runaway by limiting the maximum pressure difference between the two wheels of the axle can be switched on.

That is, if the appropriate program steps are stored in the microcomputers 1, 2, this can be prevented by the coding process of the network 12. An adaptation of the signals processing the wheel sensors 5l-s4 can also be carried out by means of this coding effect. These signals can also be used for other purposes, in particular for the conversion of the pulse frequency into the angular velocity of the wheels, and for many other changes depending on the vehicle type and brake design.

Following the data selection step 24 is a controller program initialization step 25, which operates in a manner appropriate to the vehicle type and design values. - Adaptation of the arm lux width is also carried out by the aforementioned coding. By adapting this base pulse width, the increase and decrease of the brake pressure is controlled in accordance with the characteristics of the wheel brakes used. The triggering action of additional functions, such as traction slip control, can be influenced by this coding process.

Depending on the embodiment of the controller, the data exchange bus 221C may also be used at large time intervals during predetermined infrastructure scenes by the coding of the network 12.
send. For example, when the power switch is turned on, or at predetermined instants within each signal processing cycle. Apart from these input times, i.e. after uncoupling the data network 12 by opening the switches in the network 13, the data exchange bus 27 is available for other functions and/or for the transfer of data without restriction. can.

The introduction of the adapter network 12.13 according to the invention allows the controller to be used in a wide variety of applications and also at a very low cost. The fact that memory requirements can be increased by a general program that needs to be permanently stored in a microcomputer is a secondary problem. The reason for this is that modern microcomputer chips have sufficient storage capacity.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an overall system according to an embodiment of the present invention, and FIG. 2 is a flowchart of a program for creating the system shown in FIG. 1.2...Micro Combiator, 3,4.27...
・Bus, 5...Trigger circuit, 7...Booster circuit, 9...Brake pressure control pulp, 12...
・Etater (adapter) network, 13... switch circuit, 19, 20... control line,
81-S4...Wheel sensor.

Claims (4)

[Claims] (1) An electronic controller, in particular for e.g. brake slip control and/or traction slip control of a motor vehicle, comprising an electronic circuit, by means of which a control signal, e.g.
In such a programmable electronic controller, the brake pressure control signal is generated in response to a measurement signal under a preset program stored in a microprocessor or microcomputer with an associated internal and/or external memory, in said memory; , a general program can be stored, which program can be adapted to different applications and/or designs of systems, for example braking systems, and can be controlled by said controller, which controller includes an adapter. Circuit (12,
13), the adapter circuit being able to be modified during the manufacturing process of the controller and allowing the program to be adapted to a particular application and/or design. electronic controller. (2) said adapter circuit (12, 13) is provided with a bridge circuit or a resistor network (12), which allows for different applications and/or designs of the system controlled by said electronic controller; 2. Electronic controller according to claim 1, characterized in that the potentials at the inputs and/or memory inputs of the microprocessor, the microcomputer (1, 2) can be determined. (3) the adapter circuit (12, 13) is constituted by a coder network (12) and a switch network (13), whereby adaptation instructions are executed at specific times or predetermined instants of the program; Electronic controller according to claim 1, characterized in that it is supplied to the microprocessor, microcomputer (1, 2) and/or memory input. (4) The electronic controller according to claim 3, which has several microprocessors or microcomputers (1, 2), and data is exchanged between them during program operation. and switch networks (12, 13)
an electronic controller, characterized in that it is connected to a data exchange line (27) and/or to a data exchange bus.