Loading
Loading
IPGATE AG · IP Portfolio A · A2
| Inventors | Heinz Leiber, Dr. Thomas Leiber |
| Priority | November 21, 2005 |
| Portfolio | IP Portfolio A · A2 |
| Innovations | 13 independent inventions |
| Jurisdictions | EP, DE, US — 4 patents, 13 independent claims — E90DE confirmed by BPatG |
The E90 patent family comprises four intellectual property rights in three jurisdictions: The European patent E90EP (EP 1 874 602 B1) with two independent claims relating to MUX-ABS pressure modulation with a tandem piston-cylinder. In Germany, the parent application E90DE (DE 10 2005 055 751) with six independent claims, finally confirmed by the Patent Court, regarding the fundamentals of MUX-ABS control, as well as the divisional application E90DE1 (DE 10 2005 063 658 B3) with two independent claims relating to noise-optimized pre-pressure control. In the USA, the corresponding patent E90US (US 8,540,324 B2) with three independent claims.
The inventions relate to a novel MUX-controlled pressure modulation for ABS in a closed brake circuit. The piston-cylinder system handles both brake force amplification and ABS/ASR control. Pressure control is achieved via a map-based state control based on piston stroke, motor current, and the pressure-volume characteristic curve of the wheel brakes. The concept of the closed-loop braking circuit continues to be of high technological relevance, particularly for 2-channel pressure regulators for a vehicle axle.
Note: The 6 independent claims of DE 10 2005 055 751 were finally confirmed by the Patent Court.
The E90 patent family comprises four intellectual property rights in three jurisdictions: The European patent E90EP (EP 1 874 602 B1) with two independent claims relating to MUX-ABS pressure modulation with a tandem piston-cylinder. In Germany, the parent application E90DE (DE 10 2005 055 751) with six independent claims, finally confirmed by the Patent Court, regarding the fundamentals of MUX-ABS control, as well as the divisional application E90DE1 (DE 10 2005 063 658 B3) with two independent claims relating to noise-optimized pre-pressure control. In the USA, the corresponding patent E90US (US 8,540,324 B2) with three independent claims.
The inventions relate to a novel MUX-controlled pressure modulation for ABS in a closed brake circuit. The piston-cylinder system handles both brake force amplification and ABS/ASR control. Pressure control is achieved via a map-based state control based on piston stroke, motor current, and the pressure-volume characteristic curve of the wheel brakes. The concept of the closed-loop braking circuit continues to be of high technological relevance, particularly for 2-channel pressure regulators for a vehicle axle.
The E90 patent family protects the fundamentals of MUX pressure modulation in a closed brake circuit. The concept enables the integration of a brake booster and ABS/ASR into a single compact unit, resulting in significant reductions in installation space and costs. Map-based control via the p-V characteristic curve forms the basis for precise pressure modulation. Adaptive pre-pressure control reduces valve activity and pressure fluctuations—particularly relevant for 1-box braking systems. All 6 claims of the E90DE were finally confirmed by the Patent Court.
13 independent claims across 4 patents covering MUX-ABS pressure modulation and adaptive NVH pre-pressure control.
Invention Overview
| Invention | Cat. | Description | Keyword |
|---|---|---|---|
| E90EP A1EP 1 874 602 B1 | Device | Tandem piston-cylinder with MUX pressure modulation and pV characteristic curve evaluation. Both brake force amplification and ABS/ASR control are performed by the same piston-cylinder system. | MUX-ABS · Tandem piston · pV curve |
| E90EP A7EP 1 874 602 B1 | Method | Pressure adjustment method with variable pressure gradient control per wheel — enables wheel-specific ABS modulation dynamics via map-based state control. | Variable pressure gradient · Wheel-selective · Map control |
| E90DE A1–A6DE 10 2005 055 751 · BPatG confirmed | Device + Method | Six independent claims covering: brushless motor + pV curve constant pressure gradient (A1); adaptive current-piston position map with runtime adaptation (A2); rotary angle sensor + pressure sensor (A3); and their method equivalents (A4–A6). All 6 finally confirmed by the Patent Court. | MUX-ABS · 6 claims · BPatG confirmed · Adaptive map |
| E90DE1 A1DE 10 2005 063 658 B3 | Device | Adaptive friction coefficient-dependent pre-pressure control for NVH optimisation. The pre-pressure is adapted at runtime based on detected road surface friction coefficient — reducing brake noise and improving pedal feel consistency. | NVH · Pre-pressure · µ-dependent · Adaptive |
| E90DE1 A13DE 10 2005 063 658 B3 | Method | Method for friction coefficient-dependent preload adjustment — controls the pre-pressure level before valve opening based on estimated road surface friction to optimise NVH behaviour across all conditions. | Pre-pressure method · µ-adaptation · NVH |
| E90US C1US 8,540,324 B2 | Device + Method | Three independent US claims covering the MUX-ABS control concept and pre-pressure control for optimised noise behaviour in the US market. | US · MUX-ABS · Pre-pressure · NVH |
Family Overview
| File No. | Country | Status | Type | Application No. | Filed | Grant No. | Granted |
|---|---|---|---|---|---|---|---|
| E90EP | EP | Granted | Patent | EP 1 874 602 | — | EP1874602B1 | — |
| E90DE | DE | Granted | Patent · BPatG — all 6 claims confirmed | DE 10 2005 055 751 | Nov. 21, 2005 | — | — |
| E90DE1 | DE | Granted | Patent (divisional) | DE 10 2005 063 658 | Nov. 21, 2005 | DE102005063658B3 | — |
| E90US | US | Granted | Patent | US 8,540,324 | — | US8540324B2 | — |
Explore
Three generations of pressure control.
IBS Pressure Control History →