China Weichai - WT615/226B Series CNG/LPG Bus Engine

On the basis of Weichai WD615 and 226B diesel engines, WT615/226B series CNG/LPG engine has been developed by using closed loop control, three-way catalytic converter and ECU and optimizing gaseous fuel supply system and ignition system. The major parts of this series engine and original engine are universal and the high reliability of original engine has been retained. The emission data can meet Euro III standard.

WT615 Turbocharged and Inter-cooled CNG Engine

Lean mixture combustion technique, electronic high-energy ignition, multipoint sequential injection and electronic control gas supply have been adapted on the basis of WD615 turbocharged and inter-cooled diesel engine. The major parts of this engine and original diesel engine are universal, and the mounting dimensions are the same. The emission meets Euro  III standard.

Model	Unit	TBD226B-6CNG	WT615Z280CNG	TBD226B-6LPG	WT615Z260LPG
Type	-	In line, water cool, six- cylinder, wet cylinder liner, turbo charged inter cooling, lean burn, electric control injection, electric control ignition	In line, water cool, six-cylinder, dry cylinder liner, turbo charged inter cooling, lean burn, electric control injection, electric control ignition	In line, water cool, six- cylinder, wet cylinder liner, turbo charged inter cooling, lean burn, electric control injection, electric control ignition	In line, water cool, six-cylinder, dry cylinder liner, turbo charged inter cooling, lean burn, electric control injection, electric control ignition
Bore/stroke	Mm	105/120	126/130	105/120	126/130
Displacemen	L	6.234	9.726	6.234	9.726
Rated output	Kw	155	206	155	191
Rated speed	R/min	2400	2200	2400	2200
Peak torque	Nm	680	1060	680	980
Peak torque/speed	R/min	1400-1600	1300-1500	1400-1600	1400-1600
Emission	-	Euro III(with oxygen catalyst converter), Euro II(without catalytic converter)	Euro III(with oxygen catalyst converter), Euro II(without catalytic converter)	Euro III(with oxygen catalyst converter), Euro II(without catalytic converter)	Euro III(with oxygen catalyst converter), Euro II(without catalytic converter)
fuel	-	CNG	CNG	LPG	LPG
Net weight	Kg	600	850	600	850
Over all dimension(LxWxH)	Mm	1214x723x1081	1411x931x1122	1214x723x1081	1411x931x1122
Suit for	-	9-11 Meter Bus	10-12 Meter Bus	9-11 Meter Bus	10-12 Meter Bus