Angle of the valves give better flow into and out of the cylinder
Higher center of gravity
Costs more to produce and fix
Single cam to run them all
Cheaper to produce and fix
More compact setup
Angles of valve complicates flow paths (not as ...
Yes, because the counterweights are there to reduce or elimination of vibration.
If you consider the vibration is caused by a movement of the crank against the bearing then it can be considered it is causing damage.
Engineers calculate the offset rotating loads for the rotation of the crank and design the counterweights accordingly.
Then if the power strokes ...
At a guess I would likely say ptfe since it’s capable of both operating at the pressure and temperature required. Plus since we have already been using it for similar applications it would be the easiest way to engineer such a cam.
Below is a diagram of how this is applied to ball valves.
For a 2-stroke engine, the least amount of back pressure inside the exhaust the better. If you look at performance chainsaws (yah, it's a real thing), you'll see an exhaust system which has a broad section in the middle of the pipe, then goes back to a smaller size. This broad area allows for the gasses to speed up as its cooling down, thus creating a draw ...
The Bosch Kugelfischer (I'll use "BK" for short going forward) mechanical plunger injection pumps for petrol engines were used across a variety of makes/models of vehicles from the late 60's into the mid-80's. They were derived from the diesel pumps as you suggested. A couple of vehicles which use the BK pump was the BMW 2002Tii and 2002 Turbo. ...