Why is the LSY engine considered untouchable?
1 Answers
LSY is currently one of General Motors' most mainstream engines, boasting very high technological sophistication. However, it falls short of the LTG in terms of power and lacks the mid-to-high-speed explosive power of the LTG. Additionally, during cylinder deactivation, the operation is not as smooth as the LTG due to the added cylinder deactivation mechanism. Nevertheless, the LSY offers better fuel economy than the LTG, with more advanced technology and more linear power output. More details are as follows: 1. Tripower Valve Management Technology: The LSY engine can control the valves to achieve special opening degrees during operation. In four-cylinder operation mode, the intake valves are fully open during the intake stroke, and the air intake is normal, so the fuel injection follows the standard air-fuel ratio (14.7:1). This mode delivers a good performance experience, thanks to its maximum power reserve of 177kW/350Nm (1500~4000rpm). 2. Intelligent Cylinder Deactivation Technology: The LSY engine's crankshaft structure is also very unique. Under the control system's command, it can shut down the operation of cylinders 2 and 3, leaving only cylinders 1 and 4 working in a "half-open valve" state. Theoretically, fuel consumption is halved, though the power output in two-cylinder mode is somewhat reduced, leading to a slight increase in operating RPM. Nonetheless, the overall fuel-saving effect remains quite impressive.
