The Mu V6 (G6EA) is based on the Delta series and adopted some innovations of the parallel developed Lambda series , which was released in 2004 . This includes the CVVT, the changeover to mechanical bucket tappets and the almost identical cylinder head. The Mu is a 60 degree six cylinder and uses all aluminum block and heads. It features DOHC with 4 valves per cylinder, Variable intake system (VIS), Variable length intake runners (VLM) and Multi-Port Fuel Injection (MPi). The engines were built in Asan, Korea by Hyundai. [1]
Compared to the predecessor Delta, the compression was increased slightly to 10.4, which led to an approximately three percent fuel saving (Compression ratio). In addition, the cylinder head was modified to add a CVVT named camshaft adjustment for the intake side which enabled it to produce 188 PS (138 kW; 185 hp) at 6,000 rpm and 25.2 kg⋅m (247 N⋅m; 182 lb⋅ft) of torque at 4,000. The Mu utilizes a timing belt to drive the exhaust cams on each bank of the engine, with the intake cam sprocket driven by a chain. The CVVT mechanism in the Mu varies intake cam timing relative to the exhaust cam timing, which is fixed. This did not vary the valve lift nor duration.
In 2008, the CVVT control was updated to include the exhaust cams as well (Dual-CVVT), which enabled it to produce 194 PS (143 kW; 191 hp) at 6,000 rpm and 25.4 kg⋅m (249 N⋅m; 184 lb⋅ft) of torque at 4,500 rpm, the Kia Cadenza from 2010 to 2013 utilized this variant with unpublished changes to produce 200 PS (147 kW; 197 hp) at 6,000 rpm and 25.4 kg⋅m (249 N⋅m; 184 lb⋅ft) of torque at 4,500 rpm.
A version for LPG, (codenamed L6EA) was made for the Korean market, utilizing a Compression Ratio of 10.0, it produced 164 PS (121 kW; 162 hp) at 5,200 rpm and 25 kg⋅m (245 N⋅m; 181 lb⋅ft) of torque at 4,000 rpm.
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Mu engine