IBS Development History – IP Timeline

IPGATE's entry into the brake-by-wire domain. E87 establishes the first complete IBS architecture — current-proportional pressure control via brushless EC motor. E90 covers MUX pressure modulation and adaptive pre-pressure control in the closed brake circuit.

E102 marks the leap from sequential to simultaneous pressure control — cascaded architecture with wheel-selective PWM modulation. In parallel, E112 introduces the electric motor brake booster now in 100M+ units, and E117 covers regenerative braking blending for hybrid vehicles.

E120 extends the fail-safe architecture using the existing ABS/ESP reservoir as hydraulic emergency buffer — switchable valves release brake pressure without additional hardware. E122 introduces the pedal-feel simulator with on-board diagnostics for the feed valve.

E128 provides compact modular integration of pedal travel, motor angle, piston position, and fluid level sensors on a common PCB — addressing ISO 26262 functional safety and enabling significant cost reduction in the IBS Premium feature set.

E132 closes Portfolio A with the 1-Box IBS architecture concept bridging to the second generation. In the same year, E135 opens Portfolio B with the compact PSU drive device — a fundamental shift to double-acting piston (DAP) architecture.

E136 and E139 establish the universal double-acting piston pump architecture — a double-acting piston with area switching that doubles delivery rate while halving motor torque. The optimised area ratio of 1.5:1 to 2.5:1 becomes the signature of Portfolio B.

Three families deliver the complete brake-by-wire system architecture built on the DAP. E138 introduces bidirectional DAP supply to both brake circuits; E138c extends protection to area-switchable pressure reduction; E140 adds the check-valve topology for fail-operational behaviour.

Five patent families deliver the core B2/B3 technology stack: HDS 2 high-dynamic pressure control (E141), the self-monitoring brake system (E142), floating piston BbW (E145), double-acting pressure supply with reduced valve count (E146), and the check-valve-free fault-tolerant safety architecture (E147).

The final year of IPGATE's core patent portfolio. E144 delivers modular 1-Box packaging and ECU-integrated smart sensors; E148 and E149 complete the double-acting hydraulic unit and integrated 1-Box production architecture; E150 closes the portfolio with system-wide multimodal self-diagnostics.