JPH03294902A - Controller of vehicle - Google Patents

Abstract

PURPOSE:To constitute the controller so that a control part can restart automatically the control of a vehicle by the same control constant as that of the previous time by transferring automatically the previous control constant at an actuation time when the control part necessitates the control constant. CONSTITUTION:In each control part 12 - 15 and a control constant setting part 10, interfaces for requesting a control constant transfer are provided, respec tively in order to set automatically a control constant at the time of actuation. That is, in the control constant setting part 10, interfaces 17-1 - 17 - 4 of a piece number portion of the control parts are provided, and in each control part 12 - 15, the corresponding interfaces 18-1 - 18-4 are provided, respectively, and the corresponding four pairs of interfaces are connected by communication lines 19-1 - 19-4. In such a state, at an actuation time when each control part 12 - 15 necessitates the control constant, the previous control constant is trans ferred automatically. In such a way, the control part can restart the control of a vehicle automatically by the same control constant as that of the previous time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle control device that controls a steering system, a drive system, etc. based on arbitrarily set control constants.

(Prior art) A conventional example of both control systems is one shown in Fig. 4, which includes a plurality of control systems that control the vehicle based on control constants. ■ is 1
IEEE-5AE CONVERGE in October 1988
“THE NEXT 5TEP I” announced by NCE
TOMOTIVE ELECTRONIC C0N to N8
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This conventional device includes a control constant setting section 30, a transfer switch 31
, a drive system control section 32, a steering angle control section 33, a suspension control section 34, a brake control section 35, and a communication line 36. The control constant setting unit 30 includes a CPU (not shown), RAM (with backup power supply), setting keys, etc., and is connected to each control unit 32 through a communication line 36.
It is connected to 35.

To set control constants using this conventional device, a person first operates the setting keys of the control constant setting section to
Arbitrary control constants required by the controllers 2 to 35 are set and stored in the RAM, and then these control constants are transferred to the corresponding control units 32 to 35 via the communication line 36 by manual operation of the transfer switch 31. The transferred control constants are temporarily stored in a RAM (not shown) in each of the control units 32 to 35. Thereafter, using these control constants, the CPU of each control unit performs desired vehicle control, that is, control of the drive system.
Steering angle control, suspension control, and brake control are executed.

(Problem to be Solved by the Invention) However, in such conventional devices, the set control constants are stored in the RAM in each control unit, so
These control constants are not retained and are erased when the power supply of each control section is turned to F when getting off the vehicle, and the next time you start each control section, the control constants used last time are changed from the control constant setting section. A problem arises in that a retransfer operation is required (
This problem also occurs when the battery is abnormal or when the battery is replaced.)

In addition, in order to avoid having to perform this retransfer operation, it is necessary to provide a backup power source (auxiliary battery) to the RAM in each control device and keep it constantly energized, which increases costs. invite.

It is an object of the present invention to solve the above-mentioned problems by configuring the control unit to automatically transfer the previous control constants when the control unit starts up requiring control constants.

(Means for Solving the Problems) For this purpose, the vehicle control device of the present invention includes a control constant setting section that can arbitrarily set control constants, and a control constant of the vehicle based on the control constants from the control constant setting section. A control device for a vehicle comprising a control section that performs control, including a start detection means for detecting start-up of the control section, and when the control section is started,
The present invention is characterized in that the control constant setting section sets the previous control constant as the current control constant.

(Function) According to the present invention, the activation detection means detects when the control unit that controls the vehicle based on the control constant is activated, and the control constant setting unit detects the previous control constant at the time of activation. is automatically set as the current control constant in the control section.

As a result, the control section can automatically resume controlling the vehicle with the same control constants as before, and furthermore, such a vehicle control device can be constructed at a much lower cost than when a backup power source is provided.

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a diagram showing the configuration of a first embodiment of a vehicle control device according to the present invention, and numeral 10 in the figure indicates a control constant setting section.

The control constant setting section 10 includes a CPU, RAM, setting keys, etc. (not shown). Note that the control constant setting section 10 is equipped with a backup power source in the RAM in order to store the control constants immediately before the power is turned off as the previous control constants.

A transfer switch 11 and a communication line 16 for exchanging signals between the control constant setting section 10 and each of the control sections 12 to 15 are connected. Note that transfer switch 1 in this example
1 requires operation only when setting for the first time and changing settings, and does not require operation when starting up after power needle F.

The drive system control unit 12 includes a CPU, RAM, etc. (not shown), and controls the drive system of the vehicle such as the engine and automatic transmission. Examples of drive system control using control constants include engine output control, There is a speed change control.

The steering angle control unit 13 includes a CPU, RAM, etc. (not shown).

It controls the steering system of a vehicle, and examples of steering system control using control constants include rear wheel auxiliary steering control and control to match the weight of the power steering to the driver's preference.

The suspension control unit 14 includes a CPU (not shown) and an RA.
M, etc., and uses control constants to manage, for example, suspension control that adjusts the stiffness of the suspension to the passenger's preference.

The brake control unit 15 includes a CPU, RAM, etc. (not shown), and controls the braking system of the vehicle. Brake control using control constants includes, for example, control that matches braking characteristics to the driver's preference and road surface conditions. There is. Note that the control constant setting section 10 and each control section have R for storing control constants.
The reason for providing AM is to enable control constants to be set arbitrarily.

By the way, each of the control sections 12 to 15 and the control constant setting section 10 is provided with an interface for requesting control constant transfer in order to automatically set control constants at startup as the aim of the present invention. That is, the control constant setting section 10 is provided with interfaces 17-1 to 17-4 corresponding to the number of control sections, and each of the control sections 12 to 15 is provided with corresponding interfaces 18-1 to 18-4. Communication lines 19-1 to 19-4 connect the four pairs of interfaces. In this example, four systems of control units are used to control the vehicle, but the number is not limited to this and can be changed as necessary for the entire vehicle system. The effects of the present invention are greater. Note that the interfaces 17-1 to 17-4 include transistors 'r''r+, diodes D1.
D2, resistors RI to R4, and capacitor C3, and the interfaces 18-1 to 18-4 are shown in FIG.
), the transistors T, , □,
The communication lines 19-1 to 19- are connected between the terminals a of the interfaces 17-1 to 17-4 and the terminals of the interfaces 18-1 to 18-4, respectively. 4 shall be connected.

Next, the operation of this example will be explained with reference to the timing chart of FIG.

During operation, each of the control units 12 to 15 outputs zero as a control constant request signal (hereinafter referred to as Req). On the other hand, the control constant setting section 10 connects communication lines 19-1 to 19-4 from each control section.
While Req and closing zero are input through , the third
The transfer operation is not performed unless the transfer switch 11 is manually operated to change the setting of the control constant as shown by the dotted line in the figure. In addition, each control unit 12 to 15 has an interface 18-1 to 18-1 shown in FIG. 2(b) when the power is turned off.
Since the transistor Tri of 8-4 is not driven, Req
, and outputs zero, and the control constant setting unit 10 to which this Req signal of zero is input does not perform the transfer operation in the same way as described above.

When the power is turned on to each of the control units 12 to 1 and 5, the control unit is first initialized (the time from turning on the ignition key to starting each control unit is shown in Fig. ).

When this initialization is completed, each control unit 12 to 15 respectively
Req and 1 are output via the communication lines 19-1 to 19-4 (the period for outputting 1 is set to a different length for each control unit, as shown in FIG. 3). This Req
, the control constant setting unit 10 receives a signal of 1 as 1 and automatically sets the previous control constant stored in the RAM with backup power supply as the current control constant to each control unit 12 to 15 via the communication line 16. Forward. At this time, since control constants can only be transferred one at a time, the priority order for transfer operations (in this example, the order is control units 12 → 13 → 14 → 15, but this may be determined as appropriate) is determined in advance. The control constant is set in advance, and when a plurality of control constant transfer request signals are input simultaneously, the control constant is transferred to the control unit corresponding to the priority order. Each control unit 12 to 1 until the transfer of control constants is completed.
5 does not perform any control operation, and after the transfer is completed, performs each control using the control constant.

In this way, when each control unit is activated, it is possible to resume vehicle control with the same control constants as the previous time automatically set without performing a manual transfer operation. In a vehicle like this example, which is equipped with many control units that use control constants that are tailored to the driver's preferences (or whose values reflect the driver's characteristics as a result of learning control),
This is particularly advantageous because the multiple control constant transfer operations required when automatic transfer is not performed can be omitted. Further, this example can be constructed at a lower cost than a configuration in which each RAM in each control section is provided with a backup power source. Furthermore, in this example, at startup, the control constant setting section receives a control constant transfer request signal from each control section, so by checking this signal it is possible to confirm that each control section has started up normally. .

(Effects of the Invention) Thus, as described above, the vehicle control device of the present invention automatically transfers the previous control constants at the time of startup when the control unit requires control constants, so the control unit automatically transfers the previous control constants. Control of the vehicle can be restarted using the control constants, and furthermore, such a vehicle control device can be constructed at a much lower cost than when a backup power source is provided.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of the first implementation of the vehicle control device of the present invention, and FIGS. 2(a) and 2(b) show the configuration of the interface provided in the control constant setting section and the control section, respectively. Circuit diagram, 3rd
The figure is a tanning chart for explaining the effect on the same side, and FIG. 4 is a diagram showing the configuration of a conventional vehicle control device. 10... Control constant setting section 11... Transfer switch 12... Drive system control section 13... Rudder angle control section 1
4... Suspension control section 15... Brake control section 16, 19-1 to 19-4... Communication lines 17-1 to 17
-4.18-1 to 18-4... Interface Figure 2 (a) (1)) 1 Figure 3 Gate

Claims (1)

[Scope of Claims] 1. A vehicle control device comprising a control constant setting section that can arbitrarily set control constants, and a control section that controls the vehicle based on the control constants from the control constant setting section. , a vehicle characterized in that a startup detection means for detecting startup of the control section is provided, and when the control section is started, the control constant setting section sets the previous control constant as the current control constant. control device.