Composition and operation of the gas after-treatment system of heavy diesel vehicles
The need to reduce emissions of NOx (Nitrogen Oxide) and diesel particulate matter in the atmosphere increases with each new regulatory standard and knowledge of this system will help repairers
Air conditioning controls even the finest levels of dust particles inside cars
Heating or cooling the cabin of vehicles has become commonplace with the installation of the climate system in virtually all models, but improvements to air controls continue to advance
Automotive technological evolution has many surprises about development periods - Part 1
We often think that modern cars and their advanced technologies emerged with the advancement of computers and dedicated software, which allow you to create a car in a virtual way, but it is not quite like that
Lessons learned when poor motor grounding causes malfunctions
Visual inspection is not a substitute for a voltage drop test on a circuit suspected of having a ground fault. The fact is, visual inspection takes more time and causes more problems than we can imagine
PWM signals and their applications to control vehicle components increase efficiency
Complementing the analysis of variable duty cycle electrical signals, this article presents some examples of application of PWM signals in embedded electronics systems
Electrical signals carry information generated by sensors to be processed
This article aims to present the concept of "duty cycle" applied to actuator activation signals, as well as the exchange of information between devices
Battery charging system control technology increases usage efficiency
To maintain the ideal operating conditions for the battery of modern cars with high energy consumption by electronic systems, a system called “intelligent charging” was developed
Let's see and understand how pressure transducers and pneumatic valves work
Can be two-way valves, powered by a positive and negative signal, which opens and closes, or three-way valves, which in addition to positive and negative, also have a modular function, controlled by an ECU
Advanced technologies applied to vehicles force workshops to keep up with innovations
We have to be prepared to perform basic services on vehicles, but the domain of electronics and constant advances force workshops to modernize and be able to service new cars
Performing tests on an ECU on the bench using equipment as a source and simulators. Part 2
Is the fault identified by the scanner in the vehicle or in the ECU? When faced with this situation, after some tests, the repairman realizes that a bench test of the electronic control unit is necessary
The operation of pressure transducers and pneumatic valves in the most modern systems
Can be two-way valves, powered by a positive and negative signal, which opens and closes, or three-way, which in addition to positive and negative, also has a modular function, controlled by an ECU
In winter the air conditioning services decrease, but we have the heating system
Hot air is only remembered that it exists when the cold period of winter arrives and may not work due to lack of maintenance or in some cases it has even been disabled
EGR valve and transducers, let's learn how pressure transducers work
Combustion chamber temperature control is fundamental for pollutant emissions, and one of the ways this control is through actuators such as transducers in the control of the engine's EGR valves
Onboard electronics for your workshop is the necessary evolution to keep up with cars
You have been a repairman for a long time and you have certainly been following the increase in the level of electronics in vehicles and if you are still outsourcing some services, see what can be improved
Air conditioning needs trained professionals, equipment and lots of information
Automotive climate control systems are becoming more and more complex and so should the professional skills and knowledge that are needed to make the repairs
Electric generator has the function of transforming mechanical energy into electrical energy - Part 1
This article aims to analyze the operation of the alternating current electric generator. For this, the concept of electromagnetic induction and its application to the electrical transformer is previously discussed
Air conditioning compressor electromagnetic clutch does not work - tests and replacement - Part 1
To start the operation of the air conditioning compressor of a vehicle, the system components must be checked and depending on the conditions of each one, the compressor may work or not
Vacuum pump applied to the GM Cruze, for supplying the negative pressure system
In current engines with high technology, there is a big difference in the air intake system, in which the pressure, which used to be negative, is now positive, requiring an external actuation such as the vacuum pump
Before repairing a vehicle with advanced technology, you need to know the systems
Technological advances in vehicles force repairers to seek more knowledge to evaluate and diagnose the problem conditions and even reach the conclusion of indicating the brand's authorized network
Mercedes Benz Axor 2544 2021 truck air conditioning is efficient and maintenance is easy
For the driver of this truck, the important thing is that the air conditioning offers comfort, for the air conditioning specialist repairer it is more interesting to have easy access to the components for maintenance
Toyota's new CVT transmission gained agility with the first gear that uses mechanical gear
With the arrival of the CVT Direct Shift gearbox, we can say that it was common for a car to have a slow output because of the type of transmission, Toyota changed this scenario with a hybrid gearbox
How the module processes the information sent by the sensors of each vehicle system
For optimal control of fuel injection, monitoring of the peripheral conditions of the engine in operation is essential. For this, the vehicle has several sensors at strategic points
How to identify an air-conditioned vehicle that uses R-1234yf gas
Some cars do not have the seal that identifies the type of gas applied to the air conditioning system and the most practical option would be to observe the service connections, but they are very similar
Transmission 09G or TF60-SC, let's get to know and understand why they use different identifications
The 09G or TF60-SC transmission is widely used in the Volkswagen line, let's find out the details and the differences that may exist, as it equips a very wide range of vehicles that are running on the streets
Engine connecting rods are fundamental to engines and are constantly evolving
The connecting rods join the crankshaft to the pistons, and thus transfer the pressure of the expanding gases and the forces of inertia to the crankshaft journal
Anti-lock Brake System - concepts of brake and traction control systems
Complementing the topic discussed in the previous edition, the following article presents the basic concepts of ABS and traction control systems, which allow cars to be safer
Automatic transmission, change or repair, this can happen due to lack of proper maintenance
Let's talk about a subject that must be in doubt for many repairmen. Which is more viable, repairing or replacing a transmission? How to convince the customer to make the best decision?
The evolution of automotive technology has many surprises about development periods - Part 2
We often think that modern cars and their advanced technologies emerged with the advancement of computers and dedicated software, which allow you to create a car in a virtual way, but it is not quite like that
IQ Light is Volkswagen's technology applied to the headlights of its latest vehicles
Surely you've heard of a wind tunnel for vehicle aerodynamic testing, as Volkswagen now uses a light tunnel to develop and test new vehicle lighting technologies
ABS anti-lock brake system - developed for airplanes and then applied to cars
The ABS system, or anti-lock regulation, adds the anti-lock function to the basic braking system and has the function of optimizing the process in order to contribute to the stability and safety of the vehicle
Electric cars – What do you know about the future of auto repair?
100% electric vehicles are already a reality in some countries like a good part of the fleet, in others, the laws require it to be so in a few years. Do you know the fundamentals of this technology? Check out
Electronic controls for Otto cycle vehicle actuators, components and activation signals
The electronic injection system is composed of several electronic peripherals, including sensors and actuators. Know the principle of electronics applied to the control of actuators and their signals
Air conditioning system compressor uses electric motor to drive
Conventional compressors, as we already know, are driven by a motor belt, but for electric vehicles the operation is different and the compressor has its own motor
The electronics behind diesel injector drives and injection units
A common fault in diesel engine control modules is the failure of one or more fuel injectors to fire, which can often present a unit bank related scanner fault
Zafira AW 50-40 automatic transmission stops working every 100 meters, what could be the cause?
Taking the car to the repair shop means that it needs to do some maintenance and the customer is not happy to know that the automatic transmission has to be opened to discover the defect
Commutated reluctance applied to brushless DC motors increases torque
In this motor, which is composed of an iron rotor, the electromagnets turn on and off to create negative or positive poles, when installed around the rotor and turned on in the correct sequence, they generate torque
The water pump set and the changes and technology in cooling
This is a complete solution that facilitates maintenance in automotive repair in the temperature control system, with the housing, water pump, sensor and thermostatic valve, called a cooling unit
Evaporator also has technological advances that have improved its efficiency in heat exchange
It is common to observe comments about the quality of the new materials used in the construction of evaporators and condensers, which last less and are more fragile, but everything has a justification
Examples of electronic direct fuel injection systems in Otto cycle engines
Complementing what was discussed in the previous edition, the Bosch GDI system, applied to VW/Audi engines, will be used as an example in the detailing of other direct injection concepts
Trailer with electric drive axle reduces diesel consumption and extends range
The trailer, together with the truck, shares the weight of the transported load, but only the truck has drive axles. This is changing with the arrival of auxiliary drive axles on the trailer
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