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
3 Generations
2005–2015
50+ Core Inventions
E87 · E102 · E141
3
Generations
10
Years · 2005–2015
3
Core Patent Families
50+
Core Inventions
624
Forward Citations (E87)
G1
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
Current-Proportional Pressure Control
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.
8
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
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).
G2
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 · 6 Patents · 20 Core Inventions
↑ Overcoming the sequential MUX limitation → Simultaneous / partially simultaneous operation.
Cascaded base architecture: inner loop → piston position · outer loop → target pressure (pV).
6
Patents
20
Core Inventions
4
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.
G3
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 · 13 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.
4
IP Rights
13
Indep. Claims
3
Delivery Types
2
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-Stroke 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 Freedom
Offset Calibration
Fail-Operational
Valve Reduction
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
E87
E102
Innovator & Entrepreneur
Dr. Thomas Leiber
Overall responsibility for IBS technology development · IPGATE AG
E87
E141
Co-Inventor HDS Technology
Christian Köglsperger
Control engineering & system architecture HDS 1 / HDS 2
E102
E141
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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