초록 ▼

A electronic engine control (EEC) module executes a neural network processing program to control the idle speed of an internal combustion engine by controlling the bypass air (throttle duty cycle) and the engine's ignition timing. The neural network is defined by a unitary data structure which defme

A electronic engine control (EEC) module executes a neural network processing program to control the idle speed of an internal combustion engine by controlling the bypass air (throttle duty cycle) and the engine's ignition timing. The neural network is defined by a unitary data structure which defmes the network architecture, including the number of node layers, the number of nodes per layer, and the interconnections between nodes. To achieve idle speed control, the neural network processes input signals indicating the current operating state of the engine, including engine speed, the intake mass air flow rate, a desired engine speed, engine temperature, and other variables which influence engine speed, including loads imposed by power steering and air conditioning systems. The network definition data structure holds weight values which determine the manner in which network signals, including the input signals, are combined. The network definition data structures are created by a network training system which utilizes an external training processor which employ dynamic gradient methods to derive network weight values in accordance with a cost function which quantitatively defines system objectives and an identification network which is pretined to provide gradient signals representative of the behavior of the physical plant. The training processor executes training cycles asynchronously with the operation of the EEC module in a representative test vehicle.

대표청구항 ▼

[ What is claimed is:] [1.] Apparatus for controlling the idle speed of an internal combustion engine, said engine including an ignition timing control and a throttle, said apparatus comprising, in combination:sensing means coupled to said engine for producing a plurality of input signal values, eac

[ What is claimed is:] [1.] Apparatus for controlling the idle speed of an internal combustion engine, said engine including an ignition timing control and a throttle, said apparatus comprising, in combination:sensing means coupled to said engine for producing a plurality of input signal values, each of which is indicative of a corresponding one of a plurality of engine operation conditions, said conditions including engine speed and the rate at which intake air is being delivered to said engine.data storage means for storing a neural network definition data structure which defines a neural network, said structure including:signal value data defining said input signal values and the values of signals being processed by said neural network, andweight values governing the manner in which signals are combined within said neural network, andprocessing means consisting of an electronic engine control microprocessor and program storage means for storing instructions executable by said processor, said processing means including:means responsive to said signal value data in said data structure for performing a generic neural network routine for combining selected signal values to produce and store new signal values in said data structure in accordance with said weight values in said data structure,output means coupled to said throttle and responsive to one or more of said now signal values for controlling the speed of said engine,second output means coupled to said ignition timing control and responsive to one or more of said new signals for generating, a second output signal for controlling the ignition timing of said engine, andan independently operating training processor external to said electronic engine control microprocessor.