초록 ▼

The engine control system has an ECU that supplies relatively large amount of EGR gas and delays an injection timing in order to decrease temperature in a combustion chamber. When an engine is operated under a warming up operation or a low engine load, the ECU deactivates an EGR cooler to increase i

The engine control system has an ECU that supplies relatively large amount of EGR gas and delays an injection timing in order to decrease temperature in a combustion chamber. When an engine is operated under a warming up operation or a low engine load, the ECU deactivates an EGR cooler to increase intake air temperature in order to stabilize engine operation. When the engine is operated under a high engine load, the ECU activates the EGR cooler, delays a closing timing of an intake valve, and increases a boost pressure of a forced induction system. As a result, both of a compression end temperature and a maximum combustion temperature are decreased so that emissions of NOx and particulates are reduced.

대표청구항 ▼

The engine control system has an ECU that supplies relatively large amount of EGR gas and delays an injection timing in order to decrease temperature in a combustion chamber. When an engine is operated under a warming up operation or a low engine load, the ECU deactivates an EGR cooler to increase i

The engine control system has an ECU that supplies relatively large amount of EGR gas and delays an injection timing in order to decrease temperature in a combustion chamber. When an engine is operated under a warming up operation or a low engine load, the ECU deactivates an EGR cooler to increase intake air temperature in order to stabilize engine operation. When the engine is operated under a high engine load, the ECU activates the EGR cooler, delays a closing timing of an intake valve, and increases a boost pressure of a forced induction system. As a result, both of a compression end temperature and a maximum combustion temperature are decreased so that emissions of NOx and particulates are reduced. ve sleeve disposed around the billet strap to protect the billet strap when the billet strap is secured to the Western saddle. 3. The billet strap according to claim 2, wherein the protective sleeve comprises a first portion and a second portion connected to the first portion, the second portion arranged concentric with the first portion around the billet strap. 4. The billet strap according to claim 3, wherein the second portion of the protective sleeve is shorter in length than the first portion of the protective sleeve. 5. The billet strap according to claim 3, wherein the second portion of the protective sleeve is made of a material more resistant to wear than the first portion of the protective sleeve. 6. The billet strap according to claim 2, wherein the protective sleeve is attached to at least one of the first or second portions of material forming the billet strap. 7. The billet strap according to claim 2, wherein the protective sleeve is positioned about the center of the longitudinal length of the billet strap. 8. The billet strap according to claim 1, further comprising a third portion of material connected in series to the second portion of material. 9. The billet strap according to claim 8, wherein the third portion of material has the same degree of elasticity as the first portion of material. 10. A billet strap for use in connecting a cinch to a Western saddle, the billet strap comprising a plurality of portions of material arranged longitudinally in a series, wherein each portion of material is connected to a neighboring portion of material in the series to form the billet strap, and wherein at least one portion of material in the plurality of portions has a higher degree of elasticity than one or more of the other portions of material. 11. The billet strap according to claim 10, further comprising a protective sleeve disposed around the billet strap to protect the billet strap when the billet strap is secured to the Western saddle. 12. The billet strap according to claim 11, wherein the protective sleeve is attached to at least one portion of material in the plurality of portions. 13. The billet strap according to claim 11, wherein a portion of the protective sleeve is shorter in length than the remainder of the protective sleeve. 14. The billet strap according to claim 13, wherein the shorter portion of the protective sleeve is made of a material more wear resistant than the remainder of the protective sleeve. 15. The billet strap according to claim 10, wherein the plurality of portions is comprised of a first, second, and third portion of material, and wherein the second portion of material has a higher degree of elasticity than the first and third portions of material. 16. The billet strap according to claim 15, further comprising a protective sleeve disposed around at least one of the first, second, and third portions to protect the billet strap when the billet strap is secured to the Western saddle. 17. The billet strap according to claim 16, wherein the protective sleeve is attached to one of the first, second, or third portions of material forming the billet strap. 18. The billet strap according to claim 15, further comprising a fourth and fifth portion of material connected in series with first, second, and third portions of material, wherein the fourth portion of material has a higher degree of elasticity than the first, third, and fifth portions. 19. The billet strap according to claim 18, wherein the third portion of material has a higher wear resistance than the first and fifth portions of material. 20. A billet strap for use in connecting a cinch to a Western saddle, the billet strap being formed of a strip of material having a first end and a second end, wherein the second end is unconnected and remote from the first end and not in an endless loop, wherein the strip of material is comprised of a stretch material that provides an elastic tension to the billet strap that automatically adjusts the