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The crankshaft and flywheel
| Fig. 2.5. Details of the cylinder block and crank mechanism motors and GA14DE GA16DE: I - with manual transmission; II - with an automatic transmission; 1 - the block of cylinders; 2 - the holder of the rear cuff of the crankshaft; 3 - coolant drain plug of the cylinder; 4 - an arm; 5 - inserts the crankshaft bearing; 6 - persistent half rings of a cranked shaft; 7 - crankshaft; 8 - the crankshaft bearing caps of the crankshaft; 9 - Drive hub of the oil pump; 10 - an asterisk of the crankshaft; 11 - Woodruff; 12 - a cover of the bottom head of a rod; 13 - connecting rod bearings; 14 - a rod; 15 - a lock ring; 16 - the piston pin; 17 - the piston; 18 - oil ring; 19 - lower compression ring; 20 - upper compression ring; 21 - rear lip of the crankshaft; 22 - Back Cover; 23 - a flywheel; 24 - the bottom cover; 25 - Back Cover; 26 - a conducted disk
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Crankshaft iron, pyatioporny four counterweights (see. Fig. 2.5 and 2.6).
| Fig. 2.6. Details of the cylinder and the crank mechanism of the engine SR20DE: 1 - a cover of a chain valve timing; 2 - an arm of fastening of the generator; 3 - the water pump; 4 - cylinder block; 5 - the holder of the rear cuff of the crankshaft; 6 - persistent half rings; 7 - flywheel; 8 - a back cover; 9 - the crankshaft; 10 - main bearing shells; 11 - a cover of the radical bearing; 12 - frame crankshaft bearing; 13, 14 - valve stem screen; 15 - aluminum housing; 16 - maslouspokoitelny shield; 17 - stamped steel housing; 18 - drain plug; 19 - a cover; 20 - a rod and a rod cover; 21 - big end bearings; 22 - a lock ring; 23 - the piston pin; 24 - sleeve top head of a rod; 25 - the piston; 26 - the piston rings; 27 - oil receiver with a filter of the oil pump; 28 - a sealing ring
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According to the diameter of indigenous and crankpins crankshafts are divided into three size groups, with the exception of the engine crankshaft SR20DE, having four size groups (Table 2.3.).
Table 2.3 Dimensional characteristics of the crankshaft, mm Engine model | Dimensional Group | 1 | 2 | 3 | 4 | The diameter of the main journals | Engines and GA16DE GA14DE | 49,956-49,964 | 49,948-49,956 | 49,940-49,948 | - | Engine SR20DE | 54,974-54,980 | 54,968-54,974 | 54,962-54,968 | 54,956-54,962 | Diameter crankpins | Engines and GA16DE GA14DE | 39,968-39,974 | 39,962-39,968 | 39,956-39,962 | - | Engine SR20DE | 47,968-47,974 | 47,962-47,968 | 47,956-47,962 | - | The gap between the liner and the main journal | Engines and GA16DE GA14DE | 0,018-0,042 (nominal) | Engine SR20DE | 0,004-0,022 (nominal) | Engines and GA16DE GA14DE | 0.1 (max) | The gap between the insert and crankpin | Engines and GA16DE GA14DE | 0,010-0,035 (nominal) | Engine SR20DE | 0,020-0,045 (nominal) | Engines and GA14DE GAS16DE | 0.1 (max) | The axial clearance of the crankshaft | Engines and GA14DE GAS16DE | 0,06-0,18 (nominal) | Engine SR20DE | 0,10-0,26 (nominal) | All engines | 0.3 (max) | The axial clearance of the connecting rod | All engines | 0,20-0,47 (nominal) | 0.52 (maximum) | Roundness of indigenous and crank pins, no more | All engines | 0,005 | Taper indigenous and crank pins, no more | All engines | 0,002 |
Two half-rings are installed in the refractory slot on either side of the central support of the crankshaft. They provide adjustment of the axial clearance of the crankshaft. Semirings fitted with side grooves to the crankshaft. Cast iron flywheel bolted to the crankshaft. Centering the handwheel is provided mounting sleeve. The maximum runout of the flywheel on the 115 mm diameter shall not exceed 0.15 mm.
| Fig. 2.8. Marking size groups diameters of cylinders on the engine block and GF14DE GA16DE: 1 - Room size groups cylinder bore; 2 - room size groups (size categories) bearing shells of the crankshaft; 3 - the number of size group bore number 1; 4 - the number of size group (size category) bearing pads number 1
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| Fig. 2.11. Marking size groups diameters of crankshaft journals: 1 - code size groups diameters of the crank pins of the crankshaft; 2 - code size groups diameters of the crankshaft main journals; 3 - Label size group diameter of the crank pin ?��1; 4 - label size group diameter crank journal ?��1
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| Fig. 2.12. Inserts crankshaft bearing: 1 - insert groove and lubrication hole is set by the cylinder; 2 - smooth liner is installed in the housing cover of the radical bearing; 3 - marking paint size group
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In the cylinder block and crankshaft marked to facilitate their packaging. Marking includes the five-digit code of the size categories established liners and cylinder diameters. Fig. 2.8 and 2.11 are examples of said decryption parameters. Main bearing shells, thin-walled steel with a working surface of the aluminum-tin alloy. Liners installed in the cylinder block with groove and holes for lubrication. Inserts mounted in bearing caps, smooth (Fig. 2.12). The width of all inserts are divided into size groups, which are marked with paint at the end. Inserts connecting rod bearings and thin-walled steel with a working surface of the aluminum-tin alloy. Inserts from the connecting rod have an opening which, when the assembly is aligned with the hole in the rod body. Connecting rod inserts also divided into groups thickness markable paint on the end (tab. 2.4). Repair loose leaves also vary in size groups.
Table 2.4 The thickness of the liner Engine | Color and size group | Black 0 | 1 Brown | 2 green | 3 Yellow | 4 Blue | 5 Pink | 6 white | Indigenous liners | GA14DE MGA16DE | 1,827-1,831 | 1,831-1,835 | 1,835-1,839 | 1,839-1,843 | 1,843-1,847 | - | - | SR20DE | 1,977-1,980 | 1,980-1,983 | 1,983-1,986 | 1,986-1,989 | 1,989-1,992 | 1,992-1,995 | 1,995-1,998 | Connecting rod bearings | GA14DE MGA16DE | 1,503-1,506 * | 1,506-1,509 | 1,509-1,512 | - | - | - | - | SR120DE | 1,500-1,503 * | 1,503-1,506 ** | - | - | - | - | - |
* Without a color label. ** Tag black.
The thickness of the liner and the engine GA14DE GA16DE, mm: root: 0.25 1,960-1,964 0.50 2,085-2,089 connecting rod: 0.08 1,542-1,546 0.12 1,562-1,566 0.25 1,627-1,631 The thickness of the liner motor SR20DE: root: 0.05 2,109-2,117 connecting rod: 0.08 1,541-1,549 0.12 1,561-1,569 0.25 1,626-1,634
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