Back to results
US 12,017,639 B2Granted
Diagnostic and control method for a vehicle system
AssigneeDana Belgium N.V.
InventorsPeter Deckmyn, Bjorn Aelvoet, Brecht Fevery
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for controlling and diagnosing a mechanical vehicle component. In one example, a method may include determining a vehicle speed and a plurality of clutch position settings at a diagnostic controller, and identifying unauthorized conditions based on these determinations. Further, the diagnostic controller may trigger an active fault state of the mechanical vehicle component in order to avoid unauthorized conditions that may lead to unwanted or unanticipated changes in vehicle motion.
Claims18
A method, comprising:
- at a diagnostic controller or processing unit that is independent from a driveline controller or processing unit, respectively:
- determining vehicle speed;
- determining positions of a plurality of clutches in a transmission of a driveline system;
- identifying an unauthorized clutch state based on the clutch positions and the vehicle speed;
- responsive to the identification of the unauthorized clutch state, operating the plurality of clutches in a fault state;
- and
- responsive to the identification of the unauthorized clutch state, operating an electric machine in a fault state by interrupting a transfer of electric power from an inverter to the electric machine;
- wherein the diagnostic controller or processing unit is physically separate and distinct from the driveline controller or processing unit.
5 more elements
A vehicle system, comprising:
- a transmission including a plurality of clutches that selectively engage and disengage to place the transmission in one of a plurality of discrete gear ratios;
- and
- a diagnostic controller including:
- instructions that, when executed, cause the diagnostic controller to:
- determine vehicle speed;
- determine positions of the plurality of clutches in the transmission;
- identify an unauthorized clutch state based on the clutch positions and the vehicle speed using a lookup truth table that is stored within the diagnostic controller;
- and
- responsive to the identification of the unauthorized clutch state, operate the plurality of clutches in a fault state;
- wherein operating the plurality of clutches in the fault state includes sending an active fault state command to a driveline system from the diagnostic controller that bypasses a driveline controller;
- wherein the diagnostic controller is physically separate and distinct from the driveline controller;
- and
- wherein the lookup truth table comprises vehicle speed thresholds corresponding to a set of unauthorized clutch positions.
10 more elements
A method, comprising:
- at a diagnostic controller that is independent from a driveline controller:
- determining vehicle speed from a vehicle speed sensor;
- determining a position of a plurality of clutches in a transmission of a driveline system;
- identifying an unauthorized clutch state based on a comparison between the clutch positions and the vehicle speed and unauthorized clutch settings and vehicle speed thresholds which are stored in a lookup truth table in the diagnostic controller;
- and
- responsive to the identification of the unauthorized clutch state, operating the plurality of clutches in a fault state;
- wherein the diagnostic controller is physically separated from the driveline controller using discrete circuit boards in the diagnostic controller and the driveline controller.
4 more elements
Dependencies are inferred from the claim text.