A cylinder head has at least three cylinders each coupled to at least one exhaust port, individual exhaust ducts coupled to each of the exhaust ports, and a combined exhaust duct coupling all individual exhaust ducts. The combined exhaust duct emerges from the cylinder head at a location displaced longitudinally from a center of the cylinder head.

Cylinder head for an internal combustion engine

Provided is a cylinder head including a head casting defining a plurality of exhaust ports. A tuned exhaust manifold is internally defined by the head casting. The tuned exhaust manifold includes a plurality of exhaust runners in communication with the plurality of exhaust ports and a collector volume in communication with the plurality of exhaust runners. Each of the plurality of exhaust ports and each of the plurality of exhaust runners are substantially oriented or directed toward the collector volume. Additionally, the head casting defines a main cooling jacket operable to cool the head casting. The head casting also defines an upper and lower cooling jacket disposed in heat exchange relation to the tuned exhaust manifold. The cylinder head casting may include integral spark plug tubes and cam drive case. Additionally, the cooling jackets may have a series coolant flow pattern or a parallel coolant flow pattern.

Cylinder head with integral tuned exhaust manifold

A vehicle fuel tank is provided. The vehicle fuel tank includes a housing defining an interior region, a fuel level sensor coupled to the interior region, the fuel level sensor responsive to a fuel pressure, and a radio frequency identification (RFID) device electronically coupled to the fuel level sensor configured to wirelessly transmit a signal indicative of a fuel level in the fuel tank.

Wireless fuel level sensor for a vehicle fuel tank

A cylinder head for an internal combustion engine (ICE) includes a lower cooling jacket, an upper cooling jacket and an exhaust manifold disposed therebetween. The exhaust manifold enables exhaust of combustion gas from cylinders of the ICE. The lower cooling jacket has coolant flow paths in fluid communication with coolant flow paths of a cylinder block of the ICE. Coolant flow paths of the upper cooling jacket are in fluid communication with those of the lower cooling jacket through one of a plurality of passages. The passages can be selectively plugged to define coolant flow direction through the cylinder head. The upper and lower cooling jackets are in heat exchange relationship with surfaces of the exhaust manifold to cool exhaust gas flowing therethrough.

Cylinder head with integrated exhaust manifold

An internal combustion engine has a first and a second cylinder bank. The first and second cylinder banks are arranged such that they have less than a 180 degree included angle with respect to one another, thereby forming an inboard region or generally V-shaped cavity. A respective first and second cylinder head is mounted with respect to the first and second cylinder bank. Integrated within the first and second cylinder head is a first and second integrated exhaust manifold, respectively. The first and second integrated exhaust manifolds are provided on the engine in an “inboard” orientation, i.e. disposed on a side of their respective cylinder heads such that they are substantially adjacent to the generally V-shaped cavity. The first and second integrated exhaust manifold may operate to convey exhaust gases from the engine to at least one turbocharger, which is mounted substantially within the generally V-shaped cavity.

Integrated inboard exhaust manifolds for V-type engines

A collecting exhaust port 18 provided in a cylinder head 12 is comprised of exhaust port sections 46 extending from exhaust valve bores 35 in cylinders 14, and an exhaust collecting section 47 in which the exhaust port sections 46 are collected. The cylinder head 12 includes a protrusion 49 projecting in an arch shape outside a side wall 11 1 of a cylinder block 11. The exhaust collecting section 47 of the collecting exhaust port 18 directly faces an inner surface of a side wall 12 1 of the protrusion 49. Water jackets J2 and J3 for cooling the protrusion 49 are provided in upper and lower surfaces of the protrusion 49 having the collecting exhaust port 18 defined therein. The water jackets J2 and J3 are not provided between the side wall 12 1 of the protrusion 49 and the exhaust collecting section 47. Thus, the compact cylinder head 12 having the collecting exhaust port 18 integrally provided therein can be formed, while avoiding the complication of the structure of a core.

Naohiro Isogai

Papers

Cylinder head structure in multi-cylinder engine