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Technology / Concept for reducing emissions of an ICE car
« on: 21/04/2021 22:12:47 »
This is going to be less convenient for the owner but if by reducing emissions of the car it becomes eligible for lower taxes, it may be a preferred way to go.
The idea is to make all electrical accessories of the car run on battery supply only. These components include: lights, wipers, electric power steering , power windows, water pump(if electric), fuel pump, injectors, ignition, on board computers, blower and others.
The easiest way is to remove the alternator and install a shorter belt. Some cars have electric water pumps and you can remove the belt and pulleys as well but you will lose the A/C. This will reduce the front weight by about 10kg.
Next step is installing a battery module. A typical car may require about 400W of power to operate the components so with a 5kWh module you can run the car around 10h time. After that you will have to recharge the battery.
A 5kWh battery can take 60x30x8 cm3 volume and weigh 25kg.
3 li-ion cells operate between 10.5-12.3V, which will probably be enough voltage to power run the car. If the battery can provide enough current (many can do) for the starter the 12V battery can be removed otherwise the low voltage may damage it. Some Pb-Acid batteries can withstand deep discharge but 10.5 is a bit tool low. A super capacitor bank can be also installed to increase burst current for startup but it will also increase the self discharge rate.
The 3s module will need a BMS and wires directly to the high power terminals. Some cars have the 12 battery in the boot so the high capacity battery can be installed there easily. A battery monitor will also be needed.
Then this will need a charging method. The simplest way is to install a charge connector and work with a portable charger which you can leave it home when doing short trips. With a 12V/100A 1200W charger you can charge the battery in about 5h.
One liter of gasoline contains about 8.9kWh energy. With an engine that has 30% efficiency you get 2.67kWh per liter. The 400W power needs 0.15l per hour but the conversion rate through the alternator is further reduced so it should be about 0.2l/h of fuel saving. With an average speed of a busy city for example 20kph or less can be the average speed so that means 1l/100km economy from say 18l/100km to 17 which is over 5% economy.
The idea is to make all electrical accessories of the car run on battery supply only. These components include: lights, wipers, electric power steering , power windows, water pump(if electric), fuel pump, injectors, ignition, on board computers, blower and others.
The easiest way is to remove the alternator and install a shorter belt. Some cars have electric water pumps and you can remove the belt and pulleys as well but you will lose the A/C. This will reduce the front weight by about 10kg.
Next step is installing a battery module. A typical car may require about 400W of power to operate the components so with a 5kWh module you can run the car around 10h time. After that you will have to recharge the battery.
A 5kWh battery can take 60x30x8 cm3 volume and weigh 25kg.
3 li-ion cells operate between 10.5-12.3V, which will probably be enough voltage to power run the car. If the battery can provide enough current (many can do) for the starter the 12V battery can be removed otherwise the low voltage may damage it. Some Pb-Acid batteries can withstand deep discharge but 10.5 is a bit tool low. A super capacitor bank can be also installed to increase burst current for startup but it will also increase the self discharge rate.
The 3s module will need a BMS and wires directly to the high power terminals. Some cars have the 12 battery in the boot so the high capacity battery can be installed there easily. A battery monitor will also be needed.
Then this will need a charging method. The simplest way is to install a charge connector and work with a portable charger which you can leave it home when doing short trips. With a 12V/100A 1200W charger you can charge the battery in about 5h.
One liter of gasoline contains about 8.9kWh energy. With an engine that has 30% efficiency you get 2.67kWh per liter. The 400W power needs 0.15l per hour but the conversion rate through the alternator is further reduced so it should be about 0.2l/h of fuel saving. With an average speed of a busy city for example 20kph or less can be the average speed so that means 1l/100km economy from say 18l/100km to 17 which is over 5% economy.