Real Green Vehicle Concept

[Swisaw]

You don't use power to stop a vehicle, it is friction and engine braking to some extent.

Friction from the pads would only generate heat.. Surely?

you are right to some extent, it is friction and engine to some extent but both have a power, used to stop the vehicle. Obviously when the engine also helps to stop the vehicle bears a cost, the cost of the fuel used and wear and tear to the engine.

So when a vehicle fitted with my invention the engine has to be disengaged so that the vehicle can be controlled only by braking to ensure maximum brake power gain. Another way to understand how much brake power can be generated each time we take brake to stop, lets use this energy formula: 1/2mvv or the weight of the vehicle X speed x speed x 1/2. Now assume you have a car of 1000.00kg weight and you want to stop at a speed of 45.00km/h (30mile/h) or 12.5m/s. At the moment of taking brake, the brake must provide a power equal to the power of the moving car to stop it. This power is equal to 1000 x 12.5 x 12.5 x 0.5 = 78125.00Jouls. This energy can run a 10W energy saving light bulb for over two hours.

 

[SGPS]

you are right to some extent, it is friction and engine to some extent but both have a power, used to stop the vehicle. Obviously when the engine also helps to stop the vehicle bears a cost, the cost of the fuel used and wear and tear to the engine.

So when a vehicle fitted with my invention the engine has to be disengaged so that the vehicle can be controlled only by braking to ensure maximum brake power gain. Another way to understand how much brake power can be generated each time we take brake to stop, lets use this energy formula: 1/2mvv or the weight of the vehicle X speed x speed x 1/2. Now assume you have a car of 1000.00kg weight and you want to stop at a speed of 45.00km/h (30mile/h) or 12.5m/s. At the moment of taking brake, the brake must provide a power equal to the power of the moving car to stop it. This power is equal to 1000 x 12.5 x 12.5 x 0.5 = 78125.00Jouls. This energy can run a 10W energy saving light bulb for over two hours.

Brakes use pressure and friction not power. In order to return the vehicle to its original speed would require acceleration. Brakes use vacuum for the master cylinder and foot pressure to the pedal to apply the cylinder motion in the calipers. I imagine the only way you could harvest power from the breaks would be on a reverse cycle similar to that used in a self winding watch. Heat would not generate enough power to thrust the vehicle in any direction (thats like saying you could harvest the wasted heat from a light bulb to heat water, in principle it would work, but practically impossible).

If you are using some kind of coil or sprung type system to harvest the power then this is a very interesting concept. But otherwise on the details provided i cant quite understand the theory unless it was powering and electrical motor to drive the vehicle from standing position as i believe this is when a vehicle will use most of its power to achieve momentum.

 

[MrCloser]

78 kJ one braking event as described above

132 000 kJ = gallon of petrol or 116 macdonalds burgers



What proportion of energy is wasted by braking on an urban cychttp://www.virtual-car.org/cgi-bin/wheels.cgi?sched=UDDS&cd=0.275&area=2.36&faunit=m2&crr=0.008&cw=1500&cwunit=kg&payload=100&plunit=kg&rot=1.0&whdia=0.75&wdunit=m&rho=1.2&adunit=kg%2Fm3&hv=114132&hvunit=btu%2Fgal&ee=20&eeunit=percent&de=90&deunit=percent&re=0&reunit=percent&mpg=100&p_ve=1&p_rr=1&p_cd=1&p_br=1&p_cumrr=1&p_cumcd=1&p_cumbr=1&calculate=Calculatele? up to 49% according to this:

 

[Swisaw]

Brakes use pressure and friction not power. In order to return the vehicle to its original speed would require acceleration. Brakes use vacuum for the master cylinder and foot pressure to the pedal to apply the cylinder motion in the calipers. I imagine the only way you could harvest power from the breaks would be on a reverse cycle similar to that used in a self winding watch. Heat would not generate enough power to thrust the vehicle in any direction (thats like saying you could harvest the wasted heat from a light bulb to heat water, in principle it would work, but practically impossible).

If you are using some kind of coil or sprung type system to harvest the power then this is a very interesting concept. But otherwise on the details provided i cant quite understand the theory unless it was powering and electrical motor to drive the vehicle from standing position as i believe this is when a vehicle will use most of its power to achieve momentum.

The concept of self-winding watch to recover and reuse brake power is very interesting. It is a lot more efficient than flywheels and electric generators. But it can not be patented because the concept has been in use for hundreds of years before the invention of self-propelling vehicles. This could be the reason as why it has not been applied in vehicles to recover and reuse brake power.

 

[Swisaw]

78 kJ one braking event as described above

132 000 kJ = gallon of petrol or 116 macdonalds burgers



What proportion of energy is wasted by braking on an urban cychttp://www.virtual-car.org/cgi-bin/wheels.cgi?sched=UDDS&cd=0.275&area=2.36&faunit=m2&crr=0.008&cw=1500&cwunit=kg&payload=100&plunit=kg&rot=1.0&whdia=0.75&wdunit=m&rho=1.2&adunit=kg%2Fm3&hv=114132&hvunit=btu%2Fgal&ee=20&eeunit=percent&de=90&deunit=percent&re=0&reunit=percent&mpg=100&p_ve=1&p_rr=1&p_cd=1&p_br=1&p_cumrr=1&p_cumcd=1&p_cumbr=1&calculate=Calculatele? up to 49% according to this:

When you take brake to slow down or to stop you don't lose any energy, fuel, if you declutch as I do always. Usually people don't declutch when they brake. in this case the engine helps the brake a bit. This has a cost, the cost of fuel and wear and tear to the engine. This cost my be negligible but on the long run it is a lot.

 

[MrCloser]

When the throttle is closed (or injector pulse reduced) there is only idle mixture going through the engine, clutching on the over run just knackers the clutch thrust release bearing ten times faster. Also I think engine braking helps keep the piston rings moving and reduces bore glazing.

If I were you i wouldn't bother trying to convert the world - just build a working prototype and prove us all wrong.

 

I think engine braking helps keep the piston rings moving and reduces bore glazing.
.

Hardly if it moves it will wear out,including you.

Earl

 

[MrCloser]

Hardly if it moves it will wear out,including you.

Earl

..except bore glazing isn't about wear, it is about the ring's ability to seal against the surface finish of the cylinder walls, likewise sticking rings might be leaking compression but still be within manufacturer's spec.

 

[maddisondobson]

Thanks for sharing. This is really a great article which is completely understandable because of the help of flow chart. I also thanks to other commentators who discuss this topic for information.

 

[Swisaw]

Also I think engine braking helps keep the piston rings moving and reduces bore glazing

I didn't take notice about bore glazing but it seems to be some thing important. You may have a point.

http://coxengineering.web.officelive.com/bore.aspx

 

[Swisaw]

I am pleased to announce that this morning I discovered that the engine needed to rum my real green vehicle concept can be reduced in size and weight by as much as half when compared to an ordinary engine running an ordinary vehicle. This saves fuel and wear and tears further. This discovery came about because I am already redrafting the concept to send it to all road and railway vehicle manufacturers. If no one interested I will disclose full details here. The discovery came about when I reached to write about the power storages taking power from the engine to drive the vehicle.


The following is some simple logic of this discovery: Imagine you drive your vehicle in a city. You will need many times to slow down or to stop or to drive in full speed limit. On the basis of simple logic, we could say you drove your vehicle in the city at an average speed of half full speed limit. In other words the engine was providing half of its power during the journey. Now if your vehicle was a real green vehicle, your vehicle would have needed an engine half the size of an engine running the same size ordinary vehicle. This is because the engine of real green vehicle always runs at full throttle at the same average speed of an ordinary engine running the same size of an ordinary vehicle.

 

[roydmoorian]

If you have taken a test drive in a Nissan Leaf you will have noticed how the regenerative braking boosts the stored power in the battery to give extra range, just so long as the braking is gentle.

Biggest hurdle is the fact that the battery hire charges, which are inescapable, cost almost as much per mile as fuel costs on a well driven equivalent sized diesel car :redface:

 

I can't understand why the leaf and others do not have solar panels in the roof,especially in sunny countries?

 

[Swisaw]

If you have taken a test drive in a Nissan Leaf you will have noticed how the regenerative braking boosts the stored power in the battery to give extra range, just so long as the braking is gentle.

Biggest hurdle is the fact that the battery hire charges, which are inescapable, cost almost as much per mile as fuel costs on a well driven equivalent sized diesel car :redface:

Unfortunately it is electrical, which is not efficient. it is useful on motorways but not good enough inside cities. My concept is different. It works at any speed. Before I was worried a bit about the extra weight. Now theoretically I can say that my concept doesn't add any extra weight. Because the engine of my concept becomes lighter than the extra weight of my concept.

 

[Swisaw]

I can't understand why the leaf and others do not have solar panels in the roof,especially in sunny countries?

It lowers the prestige and image of the car and the roof is not big enough to generate a useful power.

 

[detgadget]

More likely cost and efficiency are the reason. The amount of power the solar power generates does not offset the additional cost and the weight the panels add to the car.

 

It lowers the prestige and image of the car and the roof is not big enough to generate a useful power.

as an independant means of charging the batteries?

 

[Swisaw]

as an independant means of charging the batteries?

Not good enough. It can not generate electrical charges enough, even not enough to start the vehicle once.

 

[roydmoorian]

It lowers the prestige and image of the car and the roof is not big enough to generate a useful power.

It wouldn't spoil the Aerodynamics or the prestige / image of the van you have on your website significantly.

Ideal vehicle for practical assessment of your theories I would have thought.

 

[Swisaw]

It wouldn't spoil the Aerodynamics or the prestige / image of the van you have on your website significantly.

Ideal vehicle for practical assessment of your theories I would have thought.

But it adds extra weight, costs more than what it gives back. Solar panells are not good on mobile points like vehicles because of their weight.

Any way that van finished. A 12.00tone truck hit it at the back and completely damaged it. I am lucky nothing seriously happened to me.

 

[roydmoorian]

A 12.00tone truck hit it at the back and completely damaged it. I am lucky nothing seriously happened to me.

Glad to hear you got away from that OK.

 

[Swisaw]

Glad to hear you got away from that OK.

Many thanks.

 

[Niamh-Allan]

As far as solar power is concerned there is a concept car that was tested, it whole body was covered with solar cells but then also it could not produce enough power to run the vehicle continuously. It can be used as a add on to make battery last longer with continuous charging at a lesser rate of discharging. There is a new truck which runs on BIO-DME fuel specially designed for logistic companies to reduce the air pollution.