Arrangement and method for configuration of distributed computer networks implemented in multi cylinder combustion engines
First Claim
1. A control system for a combustion engine having a plurality of cylinders, each of which has associated fuel supply means, which control system comprises:
- a distributed computer network having a main computer and a number of node computers, each respective node computer being arranged closely to a selected group of the cylinders of the combustion engine and controlling at least the fuel supply means of the cylinders of said group, the main computer and the node computers being connected to a common communication loop transmitting control data from the main computer to the node computers and information from the node computers to the main computer;
a first switch means arranged at each node computer for setting a node number during installation of the node computer;
a second switch means arranged at each node computer for setting the total number of cylinders of the combustion engine; and
the main computer having a number of stored programs, each program used for generating basic control data in the form of at least one of fuel amount and ignition timing for a specific engine type, each node computer including a memory containing cylinder individual relation data for every cylinder of each specific engine type stored in the main computer.
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Accused Products
Abstract
An arrangement and a method for configuration of a combustion engine control system, the control system including a distributed computer network having a main computer ECU and a number of node computers, CCU 1/CCU 2/CCU 3. Each node computer is arranged closely to a selected group of cylinders (11, 12/13, 14/15, 16) of the combustion engine and controls at least the fuel supply (22) of each respective group of cylinders. The main computer and the node computers are connected to a common communication loop (1) transmitting control data from the main computer to the node computers and information from the node computers to the main computer. By using dual switch devices (30, 31-32/51a-b, 52a-b, 53a-b ) at each node computer, the main computer as well as each individual node computer can be configured for the present engine type, and the node computers can be configured for the specific cylinders. The switch device preferably constitutes a number of rotary switches of the BCD-type.
57 Citations
9 Claims
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1. A control system for a combustion engine having a plurality of cylinders, each of which has associated fuel supply means, which control system comprises:
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a distributed computer network having a main computer and a number of node computers, each respective node computer being arranged closely to a selected group of the cylinders of the combustion engine and controlling at least the fuel supply means of the cylinders of said group, the main computer and the node computers being connected to a common communication loop transmitting control data from the main computer to the node computers and information from the node computers to the main computer; a first switch means arranged at each node computer for setting a node number during installation of the node computer; a second switch means arranged at each node computer for setting the total number of cylinders of the combustion engine; and the main computer having a number of stored programs, each program used for generating basic control data in the form of at least one of fuel amount and ignition timing for a specific engine type, each node computer including a memory containing cylinder individual relation data for every cylinder of each specific engine type stored in the main computer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Method for configuring a combustion engine control system, which control system includes a distributed computer network having a main computer and a number of node computers, each respective node computer being arranged closely to a selected group of cylinders of the combustion engine and controlling fuel supply means of the cylinders of said group, and where the main computer and the node computers are connected to a common communication loop transmitting control data from the main computer to the node computers and information from the node computers to the main computer, which method comprises the steps of:
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during installation of a node computer, manually setting a first switch means located in the node computer to a position corresponding to the total number of cylinders of the combustion engine and manually setting a second switch means located in the node computer to a position corresponding to an order number of the node computer; and during start up of the engine, causing the main computer to check that each node computer has a similar setting of the first switch means, which corresponds to the node computers having the same interpretation of the type of engine, and that each node computer has a unique setting of the second switch means indicating that the number of nodes required for the combustion engine have been installed, whereby the main computer is configured for the present type of engine and the node computers are configured for the engine type and the cylinders for which the present engine type corresponds to the order number of the node computer. - View Dependent Claims (8, 9)
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Specification