An engine including an oil passage through which oil output from an oil pump flows, an oil cooler mounted to the oil passage, and a branched oil passage for a hydraulically-powered device of the engine that is configured to branch in a location of the oil passage extending from the oil pump to the oil cooler to deliver the oil to the hydraulically-powered device.
1. An engine comprising:
an oil pump;
a first oil filter;
an oil cooler;
a first oil passage through which oil output from the oil pump flows to the first oil filter;
a second oil passage through which oil output from the first oil filter flows to the oil cooler;
a branched oil passage for a hydraulically-powered device of the engine that is configured to branch in a location of the first oil passage located upstream of the oil cooler and the first oil filter to deliver the oil to the hydraulically-powered device; and
a second oil filter for the hydraulically-powered device that has filtering resistance lower than that of the first oil filter and is mounted to a location of the branched oil passage.
2. The engine according to claim 1 , wherein the hydraulically-powered device is a hydraulically-powered variable valve timing system configured to change a phase angle of a camshaft with respect to a crankshaft and/or a hydraulically-powered tensioner configured to apply a force to a chain guide that guides a chain through which the crankshaft is cooperatively coupled to the camshaft.
3. An engine comprising:
an oil passage through which oil output from an oil pump flows;
an oil cooler mounted to the oil passage; and
a branched oil passage for a hydraulically-powered device of the engine that is configured to branch in a location of the oil passage extending from the oil pump to the oil cooler to deliver the oil to the hydraulically-powered device;
wherein at least a part of the branched oil passage for the hydraulically-powered device includes an oil guiding pipe extending outside of the engine.
4. The engine according to claim 3 , wherein the oil guiding pipe protrudes from an outer wall of a lower portion of the engine and is guided to the hydraulically-powered device located at an upper region of the engine.
5. The engine according to claim 4 , wherein the oil guiding pipe is removably attached to the engine by joints provided at both ends thereof.
6. The engine according to claim 5 , wherein the oil guiding pipe includes a metal pipe and an elastic pipe which are coupled to each other.