Wednesday, 30 March 2016

Oil gas vent line heater fault

Mercedes-Benz C200 CDI 

To reduce the presence of oil in engine components such as the air intake manifold, intercooler, turbo, etc., vehicle manufacturers are working to make improvements in this area, and have introduced the "Oil gas vent line heater” into the engine's oil vapour recovery system.

Mercedes-Benz C200 CDI fuse box

Wednesday, 23 March 2016

Excessive mechanical noise and lack of power in Renault petrol engines

Detail of the variable valve timing system
This fault affects models of the Renault group that have the following cylinder capacities and engine codes:

1.4 16V - K4J
1.6 16V - K4M
2.0 16V - F4R

*Only in engines equipped with a variable valve timing system.


With the engine running, excessive mechanical noise is heard from the top of the engine, specifically on the camshaft side on the timing side. The system displays different symptoms in the event of this fault:

- Fault indicator light on
- Excessive noise
- Unstable idling
- Lack of response
- Engine shaking or jerking
- Lack of power
- Engine rattles or is noisy
- Exhaust smells

When reading the fault codes using the diagnostic machine, the related codes are as follows:

Thursday, 17 March 2016

How does it work?: Mazda Skyactiv technology

Skyactiv technology is a manufacturing strategy implemented by Mazda. It is not only based on engine improvements but also affects the body and transmission. This technology is focussed on weight reduction and efficiency improvement, in order to improve the performance, handling and safety of the vehicle.

Petrol engines (Skyactiv-G)

Thermodynamic improvement has been the focus for the petrol engines, the compression ratio has been increased to 14:1, until now only reached in competition engines.

Petrol Skyactiv engine

The advantage of increasing the compression ratio is that it increases the thermal efficiency, which brings with it a reduction in fuel consumption.

The disadvantage in a conventional engine is self-ignition, so various measures have been taken to prevent it:

Skyactiv exhaust manifold in a petrol engine

Thursday, 10 March 2016

IMA Hybrid System

Caution!! The Honda IMA system uses high-voltage circuits (158 V). For this reason, prior to working on the IMA system, turn off the main switch to cut off the electric circuit. Moreover, the operator must respect the security measures corresponding to work with cables and high voltage components.

The Honda Civic IMA (Integrated Motor Assisted) uses a hybrid system which operates in parallel with the heat engine. The heat engine is normally driven, while the electric motor assists the heat engine. The electric motor acts as a generator during deceleration and braking.

Thursday, 3 March 2016

Charging electric vehicles

Charging electric vehicles 

The main advantage of an electric vehicle is that it does not emit any polluting gases during operation.

There are studies that show that with the introduction of 1000 electric vehicles in a city, 30,000 kg of polluting gases and more than 2 tons of CO2 would not be emitted per year.

The main disadvantage of these vehicles is that they are expensive and their range is usually short (100 km approximately).

Another problem that arises after purchasing an electric vehicle is where to plug it in to charge its battery. There are still insufficient charging points on urban roads, and we would need at least a regular charging point adapted for connecting a SAVE (Sistema Alimentación Vehículo Eléctrico) (Electric Vehicle Power System).

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