MCE-5 negative costs

The MCE-5 technology induces new costs for VCR control and for robustness and reliability improvement. But compared to other existing VCR concepts, the MCE-5 avoids extra-costs that lead to no technical advantage (see: VCR engines principles). For example:

	1)	Articulated engines present a reduced rigidity and imply developing new technologies to connect exhaust pipe and peripherals. Such features lead to additional cost, no technical benefit and a reduced powertrain reliability.
	2)	Some VCR engines based on eccentrics need the implementation of a specific transmission device to connect the engine to the gearbox.
	3)	Non-conventional piston kinematics of multi-links VCR engines present a technical risk for efficiency, performance and pollutants generation control. Resulting potential technical defects can be costly to manage in the future.

Thanks to its exclusive gear-based technology, the MCE-5 is a rigid all-in-one VCR engine block integrating both VCR transmission and VCR control. These features lead to several negative costs:

	a)	The MCE-5 VCR engine block induces no modification of other engine or vehicle components: it avoids development and mass-production of new motor-heads, new transmissions to connect the engine to the gearbox, or new connections to pipes and peripherals.
	b)	The MCE-5 presents a rigid block and crankshaft, avoiding unexpected noise emissions and new needs for vehicle soundproofing improvement.
	c)	Whatever the Compression Ratio, the MCE-5 piston kinematics remains purely identical to that of conventional engines: this permits to reduce VCR engines development risk and duration by allowing engineers to make the most of their know-how related to combustion and performance control.
	d)	The MCE-5 roller-guided piston avoids to have recourse to costly technical solutions and materials to improve cylinder durability of highly downsized engines.

Conclusion

Among all existing VCR technologies, the MCE-5 is a purely conservative concept that generates no additional risk from the combustion point of view and no useless technical challenge induced by possible defects. In the field of development and mass-production of VCR engines, these particularities constitute strong cost-saving sources.