For the answer to the task № 136 “twist-twirl” Alexander Samoilenko, the inhabitant of Stavropol, receives from the company Playme-Russia combostyle “3 in 1” Playme Turbo. And now a new difficult taskAlexey Revin “driving”Expert
PROBLEM # 139
What do the sensors
“That’s earlier life was, – complains a seasoned garage avtoremontniki Petrovich. – From the sensors on the car was only indicating the temperature of engine and oil pressure. And now!.. Hell break a leg”. – “Is that – echoes Nikolaitch. – There are sensors of new types and old ones die out like dinosaurs. I heard there is a sensor that lives in the “brains” of the machine. And what is he doing?”
Help motorists to remember the sensors that are installed on modern engines, and their purpose.
Remember that short answers are not considered.
The answer marked as “Contest” send before October 1, 2019 at the address: 107045, Moscow, Seliverstov per., 10—, or e‑mail: email@example.com. Enter your phone number or other method of rapid communication.
We pledge to read all your posts on the topic. The prize will be marked not only correct, but also the most complete solution to the competition problems with detailed answers.
And now to sum up the results of the “Contest of experts” from the June issue of the magazine “Behind the wheel”.
Readers had to answer what the engine parts rotate. The job concerned the concrete engine motor vosmiklapanny Grants.
Answers it’s a lot, because our drivers know well the design of the engine, leading biography from “vomeronasal” power unit, which was shown also at the exhibition “Avtoprom‑84”.
Wrong answers almost was not. Some indicated that, rotate the crankshaft bearings and the camshafts.
Remember, what does the word “bearing”? What is “under the tongue”. That is, in the engine tenon (shaft) rotates, and bearing no.
Someone remembered even circulating in a circle of liquid in the cooling system. And about two accessory belt and timing belt. One attentive reader has counted 182 rotating parts, including the rivets of the bearing cage. But much more interesting was to point out those details that do not seem to rotate, though structurally obliged to rotate. The explanations contained in the full and correct answer.
Toes to enumerate all of the details is really not enough. Rotate crankshaft and camshafts, flywheel with clutch parts, oil pump, water pump, rollers, timing belt and accessory drive. Rotate also both belt — driven and timing. It’s all just.
The rotating parts of the mechanism timing: 1 — camshaft; 2 — an adjusting washer; 3 — pusher; 4 — spring; 5 — valve.The rotating parts of the mechanism timing: 1 — camshaft; 2 — an adjusting washer; 3 — pusher; 4 — spring; 5 — valve.
Then there are the parts where the rotational speed does not coincide with the revolutions of the crankshaft, and multiples of them with a certain reduction. For example, the camshaft turns half speed of the crankshaft, a generator — approximately two and a half times faster. Also turns a lot of parts in the throttle actuator.
And finally, there is a group of slowly cranking parts. Why do they do it? For a more uniform and, as a consequence, less wear and tear. Because parts are not aligned to each other in one position because turning the oil in the gap is constantly being updated and the products of wear are removed from the contact zone.
Among these parts, the piston rings gradually turning in the grooves of the pistons. Piston pins, since steel can float (they are now not pressed into the connecting rods), also gradually turn in the piston bosses and small end of connecting rod. And, of course, many details of timing: rotate the cups-followers, thrust washers, flaps with springs. Specially to make the rotation disk and the pushers, the axis of the Cam of the camshaft is offset from the axis of the well under the tappet in the cylinder head. This causes the rotation of the thrust washers, which, in turn, frictionally tighten the tappets.
The axis of the Cam of the camshaft (a) offset relative to the axis of the pusher (b).The axis of the Cam of the camshaft (a) offset relative to the axis of the pusher (b).
And yet when the crankshaft rotation speed is above 4000 rpm the vibrations rotated the valves and valve springs. This happens because spring and coil even when the valve lift.
By the way, in the engines of trucks ZIL valves were equipped with a special device that resembles a ratchet mechanism, which forcibly turns the valves.
It’s funny that in the case of oil starvation of the engine appear at least two rotating parts — liners.
- Why motors die early, read here.
All the participants thank you. Alexander Samoilenko congratulations! He receives from the company Playme-Russia combostyle “3 in 1” Playme Turbo.
Photo: depositphotos.com “Behind the wheel”
How much do you sensors called? The winner — prize!How much do you sensors called? The winner — prize!