Honda K engine

A cylinder head from a Honda K20Z3. Components of the i-VTEC system can be seen.

The Honda K series engine is a four-cylinder four-stroke engine introduced in 2001. The K series engines are equipped with DOHC valvetrains and use roller rockers to reduce friction. The engines use a coil-on-plug, distributorless ignition system with a coil for each spark plug. This system forgoes the use of a conventional distributor-based ignition timing system in favor of a computer-controlled system that allows the ECU to control ignition timings based on various sensor inputs. The cylinders have cast iron sleeves similar to the B-series & F-series engines, as opposed to the FRM cylinders found in the H-series and newer F series engines found only in the Honda S2000.

Similar to B series, K-Series has two short blocks with the same design; the only difference between them being the deck height. K20 uses the short block with a deck height of 212mm where K23 and K24 block has a deck height of 231.5mm.[1]

Two versions of the Honda i-VTEC system can be found on a K series engine, and both versions can come with variable timing control (VTC) on the intake cam. The VTEC system on engines like the K20A3 only operate on the intake cam; at low rpm only one intake valve is fully opened, the other opening just slightly to create a swirl effect in the combustion chamber for improved fuel atomization. At high rpm, both intake valves open fully to improve engine breathing. In engines such as the K20A2 found in the Acura RSX Type-S, the VTEC system operates on both the intake and exhaust valves, allowing both to benefit from multiple cam profiles.

K20

K20A

K20A1

K20A2

K20A3

K20A4

Power: 158  hp (116 KW) @ 6500 rpm

Torque: 140 lb·ft (190 N·m) @ 4000 rpm

K20A6

K20Z1

K20Z2

K20Z3

This inline-4-cylinder internal combustion engine is found in the US market Honda Civic Si (2006-2011) and Canadian market Acura CSX Type-S. It has an aluminum block with an aluminum head, and a bore and stroke of 86 mm x 86 mm, resulting in a 1,998 cc (121.9 cu in) displacement.

K20Z4

K20C1

K23

K23A1

K24

K24A4

K24A1

K24A2

K24A3

K24A4

K24A8

K24Z1

K24Z2

K24Z3

K24Z4

K24Z5

K24Z6

K24Z7

K24Y1

K24Y2

K24W1 (Earth Dreams)

K24W2 (Earth Dreams)

K24W3 (Earth Dreams)

K24W4 (Earth Dreams PGM-FI)

K24W7 (Earth Dreams)

direct inject

References

External links