IPGATE AG · IBS Pressure Control · Technology History

Development History of IBS Pressure Control

Three generations of electro-hydraulic Brake-by-Wire technology — from MUX/PPC through HDS 1 to HDS 2 · 2005–2015

Portfolio A →Portfolio B →IP Timeline →

3Generations

10Years · 2005–2015

3Core Patent Families

50+Core Inventions

624Forward Citations (E87)

2005

Generation 1 · MUX / PPC

MUX / PPC – Pressure Control

Patent family E87 · Inventors: H. Leiber, T. Leiber. Current-proportional pressure control via brushless EC motor: the first complete Brake-by-Wire architecture.

E87 · MUX / PPC

Piston Pressure Control (PPC)

H. Leiber, T. Leiber · 2005 · 8 Patents · 624 Forward Citations

Id/Iq vector current control with adaptive map-based control and sequential MUX valve control in the closed brake circuit. Piston velocity — not PWM control of the inlet valves — determines the pressure gradient.

Limitation – Sequential Operation: During pressure release at one wheel, simultaneous pressure build-up at another wheel is not possible. Excellent results on low-µ surfaces (snow, ice). Insufficient MUX dynamics on high-friction surfaces (asphalt) — the starting point for the development of Generation 2 (HDS 1).

Patents

624

Forward Citations

700 W

EC Motor Peak

134 ms

TTL (AEB)

Map-Based Control

Adaptive Control

Map-based state control with pV curve, ABS integration, pressure gradient management

Fail-Safe BbW

Full Safety Architecture

Fail-safe Brake-by-Wire architecture — differential travel control, defined idle stroke

Recuperation

Blending & Regen

Seamless integration of regenerative braking energy, transparent blending for ride comfort

AEB-Capable

Autonomous Emergency Braking

134 ms Time-to-Lock (AEB). EC motor with ball screw — core of the PSU architecture

View patent family E87 →

2009

Generation 2 · HDS 1

HDS 1 – Plunger Flow Control

Patent family E102 · Inventors: H. Leiber, C. Köglsperger, A. van Zanten. Overcoming the sequential MUX limitation through simultaneous / partially simultaneous operation.

E102 · HDS 1

Plunger Flow Control · Simultaneous Pressure Operation

H. Leiber, C. Köglsperger, A. van Zanten · 2009 · 10 Patents · 25 Core Inventions

↑ Overcoming the sequential MUX limitation → Simultaneous / partially simultaneous operation. Cascaded base architecture: inner loop → piston position · outer loop → target pressure (pV).

Patents

Core Inventions

Technology Channels

E102EP · Plunger Flow

Cascaded Base Architecture

Inner loop → piston position. Outer loop → target pressure (pV). Valve modulation.

E102DE / DE1 · PWM

Wheel-Selective PWM Modulation

2/2-way switching valves for simultaneous pressure control — overcoming sequential MUX operation.

E102DE2 · Pressure Profile

Bidirectional Volume Flow

Two-phase pressure control · A35: bridge claim KZS ↔ RB → foundation for HDS 2.

E102DE4 · Pressure Model

Sensorless Pressure Estimation

Model-based per-wheel pressure calculation from pHZ and/or piston position.

View patent family E102 →

2015

Generation 3 · HDS 2

HDS 2 – Hybrid Pressure Control Strategy

Patent family E141 · Inventors: Dr. T. Leiber, C. Köglsperger. Volume control combined with outlet valve timing as an additional degree of freedom.

E141 · HDS 2

Hybrid Pressure Control Strategy · 3 Delivery Types

Dr. T. Leiber, C. Köglsperger · 2015 · 4 IP Rights · 12 Independent Claims

Bridge claim E102DE2-A35: Bidirectional volume flow KZS ↔ RB via solenoid valve — direct bridge from HDS 1 (Gen 2) to HDS 2 (Gen 3). Dual sensor strategy: angle sensor + pressure sensor with offset calibration.

IP Rights

Indep. Claims

Delivery Types

Sensors (dual)

HDS 2.1 · TA1 – Plunger

Single-Stroke Piston

AV timing + volume post-delivery (TA1) · simplest delivery type with full AV control

HDS 2.2 · TA2 – DAP

Double-Acting Piston

Bidirectional delivery · simultaneous pressure build-up and release · highest dynamics

HDS 2.3 · TA3 – Rotation

Rotary Pump

Continuous delivery + AV bypass (TA3) · for compact system integration

Dual Sensor

Angle + Pressure Sensor

Offset calibration, Fail-Operational, valve reduction · two independent control degrees: volume + time

Volume + Time · AV Degree of FreedomOffset CalibrationFail-OperationalValve Reduction

View patent family E141 →

Inventors

Patent Holders

Four key individuals across three generations — from foundational patents to series architecture.

Foundational Patents

Heinz Leiber

ABS inventor · pioneer of electro-hydraulic brake technology

E87E102

Innovator & Entrepreneur

Dr. Thomas Leiber

Overall responsibility for IBS technology development · IPGATE AG

E87E141

Co-Inventor HDS Technology

Christian Köglsperger

Control engineering & system architecture HDS 1 / HDS 2

E102E141

Technical Articles & Foundations

Dr. Anton van Zanten

ESP inventor · technical articles on IBS technology · co-author E102

E102

Core Patent Families

Family	Generation	Technology	Portfolio
E87	Generation 1 · 2005	MUX / PPC – Foundational Brake-by-Wire	A1
E102	Generation 2 · 2009	HDS 1 – Plunger Flow Control	A2
E141	Generation 3 · 2015	HDS 2 – Hybrid Pressure Control Strategy	B2

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