# US 5,344,220 A · Anti-lock control system for motorcycles

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,344,220 A
- Document ID: US5344220A
- Status: Granted
- Kind: A
- Application number: 08/016,748
- Filed: 1993-02-11
- Granted: 1994-09-06
- Earliest claimed: 1992-02-14
- Assignees: FAG Kugelfischer Georg Schafer Kommanditgesellschaft auf Aktien; Bayerische Motorenwerke Aktiengesellschaft
- Inventors: Georg Roll; Heinz F. Ohm; Berthold Hauser
- Web page: https://patentgrep.com/patent/US5344220A

## CPC

- B60T 8/3225: {Systems specially adapted for single-track vehicles, e.g. motorcycles (B60T8/3235 takes precedence)}
- B60T 8/1706: {for single-track vehicles, e.g. motorcycles}
- B60T 8/5056: {Pressure reapplication using memory devices}
- B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES

## Abstract

An anti-lock system for motorcycles which includes a monitoring circuit (3) nd an overbraking preventer (4) which compares the front-wheel brake pressure continuously during the reloading phases with a pressure reference threshold and if the threshold is exceeded, with simultaneous exceeding of a high vehicle deceleration threshold, transmits a control signal to the monitoring circuit (3). The control signal results in the pressure modulator (1) only very slowly increasing the front wheel brake pressure.

## Claims

### Claim 1

An anti-lock system for motorcycles, which comprises:
means for sensing respective speeds of the front and rear wheels of the motorcycle;
means for applying braking pressure to the front wheel at a first rate;
means responsive to the sensing means for determining deceleration of the motorcycle;
means for comparing the pressure applied to the front wheel with a predetermined pressure reference threshold and, if said threshold is exceeded, along with simultaneous exceeding of a predetermine motorcycle deceleration limit, for generating a control signal to the brake pressure applying means for increasing the pressure applied to the front wheel at a second rate lower than the first rate.

### Claim 2 (depends on 1)

An anti-lock system in accordance with claim 1, including means for storing the wheel brake pressure upon the occurrence of a first tendency towards locking and for generating the pressure reference threshold by reducing said stored brake pressure by a predetermined amount.

### Claim 3 (depends on 1)

An anti-lock system in accordance with claim 1, including means for generating the motorcycle deceleration limit, said means including means for adding a first fixed value to a second value dependent upon the speed of the motorcycle.

### Claim 4 (depends on 3)

An anti-lock system in accordance with claim 3, wherein the first fixed value is a function of certain motorcycle characteristics.

### Claim 5 (depends on 3)

An anti-lock system in accordance with claim 3, wherein the first fixed value is 0.9 g.