WO1994008829A1 - Antiblockierregelverfahren - Google Patents
Antiblockierregelverfahren Download PDFInfo
- Publication number
- WO1994008829A1 WO1994008829A1 PCT/DE1993/000885 DE9300885W WO9408829A1 WO 1994008829 A1 WO1994008829 A1 WO 1994008829A1 DE 9300885 W DE9300885 W DE 9300885W WO 9408829 A1 WO9408829 A1 WO 9408829A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steering angle
- vehicle
- lock control
- determined
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1755—Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
- B60T2201/16—Curve braking control, e.g. turn control within ABS control algorithm
Definitions
- the driving situation is improved with a simpler sensor system. Due to the physical relationships between circumferential and lateral forces, which are theoretically described by the model approach of the "Kamm circle", there is always a conflict of objectives between optimal adaptation when designing ABS control algorithms and in the application stage (determining the ratio of circumferential to lateral forces) given coefficient of friction and sufficient steering ability. Adequate steerability is not guaranteed, especially in dynamic steering maneuvers, especially on low friction values. This deficiency is due to the compromise-related determination of the working point A in the ⁇ slip curve (FIG. 1), which should be close to the maximum of the curve when driving straight ahead.
- ⁇ 1 the calculated realizable by the vehicle
- a variable that can be used in the ABS control algorithm represents the difference between the analog sensor signal ⁇ 2 of a steering angle sensor and the steering angle calculated from the above equation. Depending on the size of this difference, the operating point in the
- the steering angle setpoint that can be implemented by the vehicle can also be determined using the following relationship:
- This relationship represents the low-pass filtered signal of the analog steering angle ⁇ 2 .
- the filter size FI is, on the one hand, a vehicle-specific size (e.g. depending on slip resistance, mass, etc.), but on the other hand depends to a large extent on the current vehicle speed and the increase in the steering angle d / dt. If the vehicle speed is known, it is usually possible to infer the current coefficient of friction with sufficient accuracy from the time derivative, as is known from.
- the functional relationship between filter size FI and the above sizes can thus be stored in the computer in the form of a map or a parameterized curve.
- the method just described represents a more cost-effective variant because the determination of the target steering angle ABS case is possible without additional sensors. The lack that the vehicle movement cannot be observed in the course of the control intervention must be accepted.
- a particularly advantageous application of the invention results if a separate parameterization, if necessary different, is carried out for the front and rear axles, i.e. separate operating point shift is carried out.
- the self-steering behavior oversteering and understeering of a motor vehicle in ABS regular operation can be influenced in a targeted manner.
- the rate of increase of the analog steering angle signal is also included in the evaluation (e.g. additive or multiplicative), the response behavior can be significantly improved.
- This measure also avoids a certain hypersensitivity of the response threshold.
- the driver's request can be met more quickly via the information about the differential steering angle and its adaptivity, without being braked in the further course of braking.
- FIG. 3 shows a block diagram of a brake pressure regulator.
- a control unit 1 the speed signals v 1 and v 2 of the front wheels (sensors 2 and 3) and the speed signal of the rear wheels (sensor 4) are supplied.
- the control unit 1 When the wheels lock, the control unit 1 generates brake pressure control signals from the wheel speed signals v 1 to v 3 according to known criteria, which brake pressure control devices 5 to 7 are supplied to vary the brake pressure.
- a transverse acceleration sensor 8 and a steering angle sensor 9 are also provided.
- the steering angle ⁇ 1 is calculated from the constants stored there, the lateral acceleration a q supplied, which can also be estimated, and the vehicle speed provided by the control unit 1 and determined from the wheel speeds.
- the steering angle difference ( ⁇ 2 - ⁇ 1 ) is then formed in a difference former 11.
- This difference is now used to shift the operating point in the direction of the arrow according to FIG. 2, the value of the difference being a measure of the shift.
- the differential signal is used to lower the thresholds, the exceeding of which triggers a pressure reduction (blocks 12), so that the pressure reduction begins earlier when a differential angle signal is present.
- Figure 4 shows a second embodiment of the invention; this figure is largely identical to Figure 3; which
- ⁇ 1n is determined according to the relationship given above.
- the current ⁇ 2, n at time n the stored ⁇ 1, n-1 (the calculated ⁇ 1 value at time n-1) and the
- a sub-block 15 of the control unit 1 determines the vehicle speed. This value and the steering angle gradient determined in a block 16 are fed to block 14, in which the variable FI is stored as a curve for the specific vehicle and depending on the current vehicle speed and the steering angle gradient.
- the Fl value supplied by block 14 is less than 1.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP93919014A EP0663876A1 (de) | 1992-10-13 | 1993-09-20 | Antiblockierregelverfahren |
| JP6509496A JPH08502005A (ja) | 1992-10-13 | 1993-09-20 | アンチロック制御方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4234456.5 | 1992-10-13 | ||
| DE4234456A DE4234456C2 (de) | 1992-01-18 | 1992-10-13 | Antiblockierregelverfahren |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1994008829A1 true WO1994008829A1 (de) | 1994-04-28 |
Family
ID=6470332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1993/000885 Ceased WO1994008829A1 (de) | 1992-10-13 | 1993-09-20 | Antiblockierregelverfahren |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0663876A1 (de) |
| JP (1) | JPH08502005A (de) |
| WO (1) | WO1994008829A1 (de) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989011409A1 (fr) * | 1988-05-24 | 1989-11-30 | Robert Bosch Gmbh | Procede pour ameliorer la maitrise d'un vehicule freine |
| DE3919347A1 (de) * | 1988-06-15 | 1990-02-15 | Aisin Seiki | Verfahren und vorrichtung zur regelung einer fahrzeugbewegung |
| EP0392164A2 (de) * | 1989-04-12 | 1990-10-17 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Ermittlung des Reibwertes zwischen der Fahrbahn und den Reifen eines Fahrzeuges |
| WO1991004891A1 (de) * | 1989-10-09 | 1991-04-18 | Robert Bosch Gmbh | Radschlupfregelsystem |
| EP0444772A2 (de) * | 1990-01-25 | 1991-09-04 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Vorrichtung und Verfahren zur Schätzung des Reibungskoeffizienten einer Strassenoberfläche |
| GB2242949A (en) * | 1990-03-22 | 1991-10-16 | Nissan Motor | Braking force control apparatus |
| WO1993013969A1 (de) * | 1992-01-18 | 1993-07-22 | Robert Bosch Gmbh | Antiblockierregelverfahren |
-
1993
- 1993-09-20 JP JP6509496A patent/JPH08502005A/ja active Pending
- 1993-09-20 WO PCT/DE1993/000885 patent/WO1994008829A1/de not_active Ceased
- 1993-09-20 EP EP93919014A patent/EP0663876A1/de not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989011409A1 (fr) * | 1988-05-24 | 1989-11-30 | Robert Bosch Gmbh | Procede pour ameliorer la maitrise d'un vehicule freine |
| DE3919347A1 (de) * | 1988-06-15 | 1990-02-15 | Aisin Seiki | Verfahren und vorrichtung zur regelung einer fahrzeugbewegung |
| EP0392164A2 (de) * | 1989-04-12 | 1990-10-17 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Ermittlung des Reibwertes zwischen der Fahrbahn und den Reifen eines Fahrzeuges |
| WO1991004891A1 (de) * | 1989-10-09 | 1991-04-18 | Robert Bosch Gmbh | Radschlupfregelsystem |
| EP0444772A2 (de) * | 1990-01-25 | 1991-09-04 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Vorrichtung und Verfahren zur Schätzung des Reibungskoeffizienten einer Strassenoberfläche |
| GB2242949A (en) * | 1990-03-22 | 1991-10-16 | Nissan Motor | Braking force control apparatus |
| WO1993013969A1 (de) * | 1992-01-18 | 1993-07-22 | Robert Bosch Gmbh | Antiblockierregelverfahren |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08502005A (ja) | 1996-03-05 |
| EP0663876A1 (de) | 1995-07-26 |
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