|
3-12-1-osobennosti-ustrojjstva.html
3.12.1. Features of the deviceThe basic sizes of a camshaft and расточек in the case of bearings of a camshaft
Cut of a head of cylinders on the final valve
|
|
1 – a head of cylinders;
2 – the final valve;
3 – маслоотражательный a cap;
4 – the valve lever;
5 – the case of bearings of a camshaft;
6 – a camshaft;
7 – an adjusting bolt;
8 – a bolt counternut;
And – a backlash between the lever and a camshaft cam |
The scheme of the mechanism of a drive of a camshaft and subsidiary organs
|
|
1 – a camshaft asterisk;
2 – a chain;
3 – успокоитель chains;
4 – an asterisk of the platen of a drive of the oil pump;
5 – an asterisk of a cranked shaft;
6 – a restrictive finger;
7 – a boot натяжителя;
8 – натяжитель chains |
Cut натяжителя chains
|
|
1 – колпачковая a nut;
2 – the case натяжителя;
3 – a core;
4 – a spring ring;
5 – a spring плунжера;
6 – a washer;
7 – плунжер;
8 – a spring;
9 – a cracker;
10 – a spring ring
|
Camshaft
The camshaft – pig-iron, cast, rotates on five support in the aluminium cast case of bearings established on a head of cylinders. From axial movings it is kept by the persistent flange placed in проточке of a forward basic neck of a shaft. The basic sizes of a camshaft and the case of bearings of a camshaft are given on fig. the Basic sizes of a camshaft and расточек in the case of bearings of a camshaft.
On cars VAZ of release till April, 1982 camshafts with cams and the basic necks tempered by currents of high frequency were established. Since April, 1982 were established азотированые camshafts. Since 1984 on shaft year of release is marked. Since 1985 camshafts with отбелом cams are established; these shaft have distinctive шестигранный a corbel between 3rd and 4th cams.
Valves are put in action by a camshaft through short steel levers 4 (fig. the Cut of a head of cylinders on the final valve see). Levers shake on a spherical head of a bolt 7 by which the backlash And between cams of a camshaft and levers is regulated.
Camshaft drive
The camshaft drive is carried out from a leading asterisk 5 (fig. the Scheme of the mechanism of a drive of a camshaft and subsidiary organs see) cranked shaft двухрядной by a roller chain. The same chain results also an asterisk 4 shaft of a drive of the oil pump. The chain drive has semi-automatic натяжитель 8 with a boot 7 and успокоитель 3 chains with rubber overlays. In the bottom part of the block of cylinders the restrictive finger 6 preventing falling off of a chain in картер at removal on the car of an asterisk of a camshaft is established.
Натяжитель consists of the case 2 (fig. the Cut натяжителя chains), a core 3 with two springs, плунжера 7 see and колпачковой nuts 1 with a tightening cracker 9 which is fixed in a nut by a lock ring. Плунжер it is kept from loss from the case by a lock ring 4.
| 