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Discussion History

Four-Cylinder Engine

Assembly

High-revving naturally aspirated or lightly boosted inline-four kept low and light. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Four-Cylinder Engine parts and their functions

7 top-level parts · 14 parts in total · full bill of materials below
Four-Cylinder Engine parts diagram: 1 all-alloy block, 2 DOHC cylinder head, 3 piston, 4 crankshaft, 5 camshaft, 6 spark plug, 7 individual throttle bodies. 14 parts in 7 top-level items.
Four-Cylinder Engine parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 All-Alloy Block 1× Lightweight aluminium block with open deck.
2 DOHC Cylinder Head 1× Twin-cam head with four valves per cylinder.
3 Piston 4× Forged aluminium piston with rings and wrist pin.
4 Crankshaft 1× Forged-steel shaft converting piston motion to rotation.
5 Camshaft 2× Lobed shaft opening intake and exhaust valves.
6 Spark Plug 4× Ignites the air-fuel mixture in a spark-ignition engine.
7 Individual Throttle Bodies 1× One throttle per cylinder for sharp throttle response.

3D model

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Build & assembly graph

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Bill of materials for Four-Cylinder Engine

7 top-level lines · 7 rows shown · 14 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 All-Alloy Block roadster-car-alloy-block 1× 1 · part
2 DOHC Cylinder Head coupe-car-cylinder-head 1× 1 · part
3 Piston hatchback-car-piston 4× 4 · part
4 Crankshaft hatchback-car-crankshaft 1× 1 · part
5 Camshaft hatchback-car-camshaft 2× 2 · part
6 Spark Plug spark-plug 4× 4 · part
7 Individual Throttle Bodies roadster-car-itb 1× 1 · part

Where the four-cylinder engine is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Powertrain

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $500–$50k. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳Weichai Power
weichai.com ↗ 		Weifang, CN Diesel & power engines 50 units 12–16 wks
🇮🇳Cummins India
cumminsindia.com ↗ 		Pune, IN Diesel engines 50 units 12–16 wks
🇨🇳Yuchai
yuchai.com ↗ 		Yulin, CN Diesel engines 50 units 12–16 wks
🇮🇳Kirloskar Oil Engines
koel.co.in ↗ 		Pune, IN Diesel & gas engines 50 units 12–16 wks
🇮🇳Ashok Leyland
ashokleyland.com ↗ 		Chennai, IN Engines & commercial vehicles 50 units 12–16 wks