Infiniti Q50 Forum banner
1 - 11 of 11 Posts

·
Registered
Joined
·
4,279 Posts
Discussion Starter · #1 ·
Well, I was under the impression from articles I read that the car would either regeneratively brake or use friction braking, but not both at the same time. Motor Trend's comment about the sudden transition from regenerative to friction braking seems to ring a bell. This factory manual page shows something pretty different and interesting going on.

 

·
Registered
Joined
·
4,279 Posts
Discussion Starter · #3 ·
NOTE TO INFINITI:

Please refine this a bit.
It is not 100% consistent.

Do that and you got a perfect hybrid.

[edit] sorry if I derailed the thread Hunter.
There's definitely some refinement that could happen, but wasn't sure what you meant by it not being 100% consistent.
 

·
Registered
Joined
·
4,279 Posts
Discussion Starter · #4 ·
Oh, unless you're talking about the changes in braking under constant pedal pressure from downshifting.
 

·
Registered
Joined
·
309 Posts
I think once people see exactly what is going on behind the scenes they will be able to know what is happening as they are feeling changes in perceived pedal effort. The car is basically simulating braking effort feel and transferring brake function twice on every stop.

I think the effects of the Q are a modest improvement over the M35H and if they do update the software may be able to dial it in a little better. It may end up being a function of the system. I know they are often quite reluctant to tinker with brake pedal issues (unless there is a verifiable safety concern).

It is my opinion that the Sport brakes are going to be a bit of a thorn in their rear on that as those brakes have been sensitive since they were new...they are however very good at stopping heavy cars, but they really like to work better when they are warmed. Until they reach that point, and even above that threshold there may always be some actual transfer of the feel of the functionality of this system. Within the electric motor unit there is no place where a buffer or cushion could be installed to absorb and feedback as the tolerances must be tight.
 

·
Registered
Joined
·
8 Posts
suspensions, cool...maybe they'll figure out how to harness and use the heat from the combustion engine to generate addl electricity
 

·
Registered
Joined
·
4,279 Posts
Discussion Starter · #8 ·
I think once people see exactly what is going on behind the scenes they will be able to know what is happening as they are feeling changes in perceived pedal effort. The car is basically simulating braking effort feel and transferring brake function twice on every stop.

I think the effects of the Q are a modest improvement over the M35H and if they do update the software may be able to dial it in a little better. It may end up being a function of the system. I know they are often quite reluctant to tinker with brake pedal issues (unless there is a verifiable safety concern).

It is my opinion that the Sport brakes are going to be a bit of a thorn in their rear on that as those brakes have been sensitive since they were new...they are however very good at stopping heavy cars, but they really like to work better when they are warmed. Until they reach that point, and even above that threshold there may always be some actual transfer of the feel of the functionality of this system. Within the electric motor unit there is no place where a buffer or cushion could be installed to absorb and feedback as the tolerances must be tight.
I'm definitely one of those people who loves to know how everything works. A lot of the fun of owning this car has been learning about its technology and how other hybrids work comparatively. I'd probably want to take the car apart and put it back together again if I had the means. I'd love to physically see how the engine, electric motor, and transmission all tie in together. Mentally I know how it all works, but physically putting my hands on it would be awesome.
 

·
Registered
Joined
·
309 Posts
suspensions, cool...maybe they'll figure out how to harness and use the heat from the combustion engine to generate addl electricity
I could see the usefulness of capturing all "free" sources of energy we have been dampening down for decades. I do wonder at this time though would it take more energy to carry the tools to capture and convert the motion of the shocks. Although I think the theory is sound, and probably similar to the wave capturing technology.

I'm definitely one of those people who loves to know how everything works. A lot of the fun of owning this car has been learning about its technology and how other hybrids work comparatively. I'd probably want to take the car apart and put it back together again if I had the means. I'd love to physically see how the engine, electric motor, and transmission all tie in together. Mentally I know how it all works, but physically putting my hands on it would be awesome.
Me too!

I rode with a member recently who has some concerns over the feel and function of the system under certain circumstances. Knowing exactly what is happening when you feel what it is doing to me it seems within the tolerance of normal. However I am basically just the end user and nothing within that system is anything I can influence so all I am capable of doing is seeing and reporting back to HQ and waiting on them. But it would make sense that the brakes would feel a bit odd.
Not nearly as odd as the brakes on some of the smaller hybrids feel...New Honda Civic anyone?

If you were in my neck of the woods we could do a little tear down and rebuild. Knock on wood I've not had to remove a single trim panel from the battery area of a Q50H so my only hands on experience is taking them apart in the training course we went through.
There are a few videos and graphics out there I will see if I can dig up that really show what the car is doing while it is doing its' thing, but it looks to me like you already have the shop manual so you have the most comprehensive data that exists on your car already.

I am most impressed by Clutch 1 and how its actuation is damned near seemless now and all it took was a few more sensors and a clutch from a 6MT G coupe.

I probably wouldn't advise going it alone, or if you do I would not post pics of it. Just to CYA
 
  • Like
Reactions: hunter81

·
Registered
Joined
·
4,279 Posts
Discussion Starter · #10 ·
I could see the usefulness of capturing all "free" sources of energy we have been dampening down for decades. I do wonder at this time though would it take more energy to carry the tools to capture and convert the motion of the shocks. Although I think the theory is sound, and probably similar to the wave capturing technology.



Me too!

I rode with a member recently who has some concerns over the feel and function of the system under certain circumstances. Knowing exactly what is happening when you feel what it is doing to me it seems within the tolerance of normal. However I am basically just the end user and nothing within that system is anything I can influence so all I am capable of doing is seeing and reporting back to HQ and waiting on them. But it would make sense that the brakes would feel a bit odd.
Not nearly as odd as the brakes on some of the smaller hybrids feel...New Honda Civic anyone?

If you were in my neck of the woods we could do a little tear down and rebuild. Knock on wood I've not had to remove a single trim panel from the battery area of a Q50H so my only hands on experience is taking them apart in the training course we went through.
There are a few videos and graphics out there I will see if I can dig up that really show what the car is doing while it is doing its' thing, but it looks to me like you already have the shop manual so you have the most comprehensive data that exists on your car already.

I am most impressed by Clutch 1 and how its actuation is damned near seemless now and all it took was a few more sensors and a clutch from a 6MT G coupe.

I probably wouldn't advise going it alone, or if you do I would not post pics of it. Just to CYA
I'll be honest, I probably never would take things apart, well, other than the trunk panels to get a better look at the battery. I'd be way to scared to screw something up, but, man, a training course like that sounds like it would be a lot of fun. If you do come across any of those videos though, send them to me. Manual or no manual, I love looking at stuff like that. The manual is a lot of fun though. I love all the breakdowns of all the components and the car.

I didn't know clutch 1 was the same one from the G although it makes sense that it would be. My last car was a 6MT G so it's cool there's a little bit of that manual in my car.
 

·
Registered
Joined
·
151 Posts
I think once people see exactly what is going on behind the scenes they will be able to know what is happening as they are feeling changes in perceived pedal effort. The car is basically simulating braking effort feel and transferring brake function twice on every stop.

I think the effects of the Q are a modest improvement over the M35H and if they do update the software may be able to dial it in a little better. It may end up being a function of the system. I know they are often quite reluctant to tinker with brake pedal issues (unless there is a verifiable safety concern).

It is my opinion that the Sport brakes are going to be a bit of a thorn in their rear on that as those brakes have been sensitive since they were new...they are however very good at stopping heavy cars, but they really like to work better when they are warmed. Until they reach that point, and even above that threshold there may always be some actual transfer of the feel of the functionality of this system. Within the electric motor unit there is no place where a buffer or cushion could be installed to absorb and feedback as the tolerances must be tight.
Totally agree with you there. A stopped vehicle in the middle lane swerved in front of me at the last second in an (at the time, open) left lane at a red light. I was coming up moderately fast since the lane had been open and while the brake pedal felt a little light initially, man did it stop fast. I fully expected to hit the other car in this situation because the person really did make this move at the last possible moment. I love the sport brakes in the Q50S and I loved them in the G37 too.

Also, driving in LA/405 traffic, you really do cherish your brakes when some (or all, it varies) lanes go from ~75 to a screeching halt out of nowhere, with little warning.
 
1 - 11 of 11 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top