direct-injection cylinder head

例句：

1. 1. The new engine design uses a direct-injection cylinder head to improve fuelefficiency.
   这款新发动机设计采用了直喷式气缸头，以提高燃油效率。
2. 2. The car's performance was significantly improved by thedirect-injection cylinder head.
   通过直喷式气缸头，这辆车的性能得到了显著提升。
3. 3. The manufacturer claims that the direct-injection cylinder head reduces emissions andincreases fuel economy.
   制造商声称，直喷式气缸头可以减少排放并提高燃油经济性。