In automotive electronics, electronic control unit (ECU) is a generic term for any embedded system that controls one or more of the electrical system or subsystems in a motor vehicle.
Types of ECU include electronic/engine control module (ECM), powertrain control module (PCM), transmission control module (TCM), brake control module (BCM or EBCM), central control module (CCM), central timing module (CTM), general electronic module (GEM), body control module (BCM), suspension control module (SCM), control unit, or control module. Taken together, these systems are sometimes referred to as the car's computer. (Technically there is no single computer but multiple ones.) Sometimes one assembly incorporates several of the individual control modules (PCM is often both engine and transmission)
Some modern motor vehicles have up to 80 ECUs. Embedded software in ECUs continue to increase in line count, complexity, and sophistication. Managing the increasing complexity and number of ECUs in a vehicle has become a key challenge for original equipment manufacturers (OEMs).
Types of electronic control units
- Airbag control unit (ACU)
- Body control module (BCU) controls door locks, electric windows, courtesy lights, etc.
- Convenience control unit (CCU)
- Door control unit (DCU)
Failure of ECU
The main symptoms of a failure would be the engine not starting, fault light constantly on and unable to be cleared. Although is quite rare, it is a big issue when it happens. To identify the initial problem, manufacturers and producers need to perform certain tests including:
- material assessment
- corrosion investigation
- electronics evaluation
- fire damage investigation
By performing such test future failures can be prevented and performance enhanced.
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EIN News (press release)
Thu, 05 Dec 2013 09:55:22 -0800
Sensors alert the Electronic Control Unit (ECU) to direct ACM actuators positioned at the front and rear of the engine to cancel engine vibration. In the cabin of the RLX, an Active Sound Control system further reduces low frequency sound relating to ...
Mon, 02 Dec 2013 09:31:00 -0800
It does this via gyro-sensor and an electronic control unit, which can figure out how much lean is needed based on the steering angle and speed. The front wheels can then move up or down as needed and allow for smoother cornering. It sounds technical ...
Tue, 03 Dec 2013 18:48:45 -0800
The difference is that when you put your foot on the pedal, it sends a signal to an electronic control unit, which determines how hard you're pressing it. If you're only touching it lightly, such as when you're slowing down for a red light up ahead ...
Land Line Magazine
Mon, 02 Dec 2013 15:03:45 -0800
The regeneration system uses an engine intake air control valve, a diesel fuel doser, an oxidation catalyst, and a catalyzed silicon carbide wall-flow filter with an electronic control unit to perform back pressure control. For more information, visit ...
Wed, 27 Nov 2013 03:19:10 -0800
Also this summer, two Spanish experts said they were about to unveil a $22 device that they claimed would let them bypass the security in a car's electronic-control unit. One of those experts, a man named Javier Vázquez Vidal, said "it would take no ...
Sat, 09 Nov 2013 06:07:02 -0800
The issue relates to brake fluid that doesn't prevent corrosion of the hydraulic electronic control unit, a problem that has led to 23 complains, a documented crash for one owner and another owner losing control of their vehicle. Owners of the affected ...
3D Car Shows
3D Car Shows
Tue, 03 Dec 2013 06:37:30 -0800
The addition of electronics, powered by its own electronic control unit (ECU), makes the KDSS system more sensitive to inputs on vehicle speed, steering angle, yaw rate, and longitudinal and lateral acceleration or deceleration. At low speed, for ...
Paint and Panel
Tue, 19 Nov 2013 17:52:30 -0800
The new IR sensor units available from Spectratek offer a unique sensor and electronic controller, these system work in unison, one measures the panel temperature dynamically in 36 different locations sending the data to the electronic control unit ...
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