Load driving control system for vehicle equipped with microcomputer
AssigneeJATCO Ltd
InventorYoshiaki Ueda
Life of this patent
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Abstract
A load driving control system for an automotive vehicle having a load such as an electric motor for a radiator fan. The load driving control system comprises a microcomputer storing a load driving necessariness decision program by which a decision is made as to whether driving of the load is necessary or not in accordance with the detected vehicle operating condition so as to output one of load driving necessariness and unnecessariness commands. A load driving circuit is provided to provide a driving current in response to the load driving necessariness command, thereby driving the load. Additionally, a load compulsorily driving requirement circuit is provided to compulsorily drive the load when the microcomputer stops outputting each command even though an ignition key switch is turned ON.
Claims10
A load driving control system for a vehicle having a load, comprising:
- a detector for detecting an operating condition of the vehicle;
- a microcomputer storing a load driving necessariness decision program by which a decision is made as to whether driving the load is necessary or not in accordance with the detected vehicle operating condition so as to output one of load driving necessariness and unnecessariness commands;
- a load driving circuit for controlling driving of the load in accordance with the load driving necessariness and unnecessariness commands, said load driving circuit being arranged to provide a driving current in response to the load driving necessariness command, the load being driven under action of said driving current;
- a compulsory drive circuit for compulsorily driving the load when the microcomputer stops outputting each command even though an ignition key switch is turned ON;
- and
- a compulsory drive stopping circuit for stopping the compulsory load driving at least during a time period in which an initialization of the microcomputer is completed, when the microcomputer stops outputting each command owing to the initialization of the microcomputer.
A load driving control method for a vehicle having a load, the method comprising the steps of:
- detecting an operating condition of the vehicle;
- storing, in a microcomputer, a load driving necessariness decision program by which a decision is made as to whether driving the load is necessary or not in accordance with the detected vehicle operating condition so as to output one of load driving necessariness and unnecessariness commands;
- controlling driving of the load in accordance with the load driving necessariness and unnecessariness commands;
- providing a driving current in response to the load driving necessariness command, the load being driven under action of said driving current;
- compulsorily driving the load when the microcomputer stops outputting each command even though an ignition key switch is turned ON;
- and
- stopping the compulsory load driving at least during a time period in which an initialization of the microcomputer is completed, when the microcomputer stops outputting each command owing to the initialization of the microcomputer.
Dependencies are inferred from the claim text.