In a conventional technology related to an electronic control device equipped in vehicles that can control in-vehicle equipment, module type electronic equipment disclosed in JP-A-8-274440 is known.
This module type electronic equipment is constituted so that a power source module can be inserted to and detached from a front side of a card cage or a power supply module part.
A power supply module connector is automatically connected with a power supply connector in a backplane when the power source module is completely inserted into a card receptor, and the connection is automatically disconnected when the power source module is detached from the card cage.
Moreover, a daughter circuit card is constituted similar to the connection structure as the above, and an operation power is supplied easily without wiring each other with the power supply relative to the power source module and the daughter circuit card.
An electronic system disclosed in JP-A-2004-246615 is a device adopted for personal computers or servers, and is constituted with a plurality of electronic modules, circuit board modules for control, and power source modules, etc. installed in a case.
A CPU that is a heat generating element and other heat generating elements are installed on each surfaces of the installed electronic modules together with a hard disk etc., and each electronic module is a part of the computer.
Moreover, a respective necessary electrical connection between each electronic module and the circuit board module or the power source module, etc. of the device side is performed by inserting (press-fitting) the connector into a connector of a common wiring circuit board.
A liquid circulation loop is constituted by inserting (press-fitting) liquid connectors of each electronic module into liquid connectors of a liquid cooling jacket at the time of the electric connection, and cooling of each electronic module becomes possible by a coolant that flows in the liquid circulation loop.
By the way, in recent years, the number of electronic control unit (ECU) required for in-vehicle equipment such as an engine and a transmission, etc. equipped in a vehicle increases in order to cope with the demand of making the vehicle with high performance.
However, when the number of the in-vehicle ECU increases, it is necessary to provide an assembly space and a cooling space for each ECU, thus causes a problem that required capacity for equipment in the vehicle increases.
Moreover, the number of wire harnesses that electrically connect between each ECU and between the ECU and power supplies increases according to the increase of ECUs, thus causes a problem that required capacity for equipment in the vehicle further increases.
Since the current used is low and the function of the electronic module is limited, a composition adopted in a personal computer or a server as shown in the above-mentioned JP-A-2004-246615 is insufficient to deal with the electronic control unit for the vehicle that has various functions increasing.
Moreover, the composition of the above-mentioned JP-A-8-274440 has a similar problem.