A motor vehicle door lock having a lock system, a closing system and a device which acts on an evaluation electronics unit

摘要

A motor vehicle door lock has a key operated lock cylinder signalling antitheft and locking-and-unlocking positions via Hall effect chips which include electronic circuitry working into evaluation circuitry connected to the chips. The chips themselves can be selected from a series of mass produced chips based on criteria including the magnetic thresholds and electrical thresholds of the chips provided that the thresholds of the evaluation circuitry are selected appropriately matching of each chip or its Hall effect element to the system is thoroughly avoided.