초록 ▼

A circuit for the electrical system of an automotive vehicle, such as a truck, interfaces a brake switch, a combination turn signal/hazard warning signal switch, and an engine electronic control module (ECM) that has two separate brake signal inputs. The circuit is especially useful when the vehicle

A circuit for the electrical system of an automotive vehicle, such as a truck, interfaces a brake switch, a combination turn signal/hazard warning signal switch, and an engine electronic control module (ECM) that has two separate brake signal inputs. The circuit is especially useful when the vehicle engine has a power take-off (PTO) to prevent unintended interruption of power flow through the PTO to an accessory device, such as a salt spreader, hydraulic pump, air compressor, etc. The circuit can be fabricated from conventional circuit components. A pre-existing vehicle can be retrofitted with the circuit by a jumper harness.

대표청구항 ▼

An electric circuit for an automotive vehicle that has brakes which are applied and released by an operator of the vehicle, a signaling system that includes brake switch means for giving a brake signal, a turn signal switch for giving right and left turn signals, and a hazard warning switch for givi

An electric circuit for an automotive vehicle that has brakes which are applied and released by an operator of the vehicle, a signaling system that includes brake switch means for giving a brake signal, a turn signal switch for giving right and left turn signals, and a hazard warning switch for giving a hazard warning signal, and an engine electronic control module that has first and second input terminals for receiving brake signals, said circuit comprising: an engine electronic control module comprising first and second inputs for receiving brake signals; a signaling system that gives brake application, right turn, left turn, and hazard warning signals; brake switch means that serves both said electronic control module and said signaling system and that is selectively operable to give respective brake non-application and brake application signals; a first feed from said brake switch means to said first input of said electronic control module for enabling said first input of said electronic control module to sense which one of said brake application and brake non-application signals is being given by said brake switch means; slave switch means slaved to said brake switch means to be selectively operable to first and second switch conditions corresponding respectively to said brake switch means giving a brake non-application signal and a brake application signal respectively, said slave switch means comprising first and second controlled conductivity paths each of which is selectively operable to respective first and second conductivity conditions corresponding respectively to the first and second switch conditions of said slave switch means respectively; a second feed from said first controlled conductivity path of said slave switch means to said second input of said electronic control module for enabling said second input of said electronic control module to sense to which one of said first and second switch conditions said slave switch means is being operated; and a third feed from said second controlled conductivity path of said slave switch means to said signaling system that, when said slave switch means is operated to its second switch condition, provides circuit continuity from said brake switch means to said signaling system for enabling said signaling system to give a stop signal, and that, when said slave switch means is operated to its first switch condition, provides no circuit continuity from said brake switch means to said signaling system.