# US 2019/0376444 A1 · Internal combustion engine for saddle-riding vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0376444 A1 - Document ID: US20190376444A1 - Status: Published application - Kind: A1 - Application number: 16/432,062 - Filed: 2019-06-05 - Published: 2019-12-12 - Earliest claimed: 2018-06-06 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Takahiro IWAMA; Katsunori KOMURO; Hiroya UEDA; Koji TERADA - Web page: https://patentgrep.com/patent/US20190376444A1 ## CPC - F02B 61/02: for driving cycles - B62J 35/00: Fuel tanks specially adapted for motorcycles or engine-assisted cycles; Arrangements thereof (fuel tanks forming part of cycle frames B62K11/00; tanks in general B60K {; closure caps for fuel tanks B60K15/0406}) - B62J 37/00: Arrangements of fuel supply lines, taps, or the like, on motor cycles or engine-assisted cycles - F04B 9/042: {the means being cams} - F04B 17/05: driven by internal-combustion engines - F04B 53/22: Arrangements for enabling ready assembly or disassembly - B62K 11/04: characterised by the engine being between front and rear wheels - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - B62J: CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - B62K: CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDECARS, FORECARS, OR THE LIKE ## Abstract An internal combustion engine is mounted on the saddle-riding vehicle. The engine includes: a cylinder head; a cylinder head cover; a fuel injection valve whose distal end is directed to a combustion chamber; a cam shaft; a fuel pump which feeds fuel due to an action of a cam which integrally rotates with the cam shaft; a fuel pump mounting member which is fixed to the cylinder head and on which the fuel pump is mounted; and a downstream side fuel pipe which feeds fuel from the fuel pump to the fuel injection valve and has flexibility. The above arrangement improves maintenance property by making a routing space of the fuel pipe compact by shortening the length of the fuel pipe while enhancing protection of the sides of the vehicle including the fuel pump. ## Claims ### Claim 1 An internal combustion engine for a saddle-riding vehicle, wherein the engine is mounted on the saddle-riding vehicle, the internal combustion engine comprising: a cylinder head having a combustion chamber formed therein; a cylinder head cover covering the cylinder head; a fuel injection valve having a distal end directed to the combustion chamber; a valve train cam shaft rotatably supported in the cylinder head and having thereon a cam integrally rotatable with the cam shaft; a fuel pump mounting member fixed to the cylinder head in a state where the fuel pump mounting member covers at least a portion of the cam shaft; a fuel pump for feeding fuel by an action of the cam, the fuel pump being fixedly mounted on the fuel pump mounting member; and a downstream side fuel pipe for supplying fuel from the fuel pump to the fuel injection valve, the downstream side fuel pipe having a flexibility. ### Claim 2 (depends on 1) The internal combustion engine for a saddle-riding vehicle as claimed in claim 1, wherein: the cylinder head cover has an opening; the fuel pump mounting member has a mounting seat portion for mounting the fuel pump thereon; and the fuel pump mounting member is disposed such that the fuel pump mounting member penetrates the opening of the cylinder head cover in such a manner that the mounting seat portion protrudes from an upper surface of the cylinder head cover. ### Claim 3 (depends on 2) The internal combustion engine for a saddle-riding vehicle as claimed in claim 2, wherein a seal member is interposed between the cylinder head cover and the fuel pump mounting member so as to extend along the opening. ### Claim 4 (depends on 3) The internal combustion engine for a saddle-riding vehicle as claimed in claim 3, wherein the downstream side fuel pipe has an upstream side connecting portion connected to the fuel pump and has a detouring portion routed in a vehicle lateral direction as viewed in plan view of the saddle-riding vehicle, with respect to a line which connects the upstream side connecting portion connected to the fuel pump and a downstream side connecting portion of the downstream side fuel pipe connected to the fuel injection valve. ### Claim 5 (depends on 3) The internal combustion engine for a saddle-riding vehicle as claimed in claim 3, wherein: an upstream side fuel pipe is provided to feed fuel from a fuel tank to the fuel pump; the fuel pump has an intake side joint portion to which the upstream side fuel pipe is connected; and the intake side joint portion is disposed on a side of a head pipe of the saddle-riding vehicle. ### Claim 6 (depends on 5) The internal combustion engine for a saddle-riding vehicle as claimed in claim 5, wherein the fuel pump is disposed between a pair of left and right main frame members extending from the head pipe. ### Claim 7 (depends on 3) The internal combustion engine for a saddle-riding vehicle as claimed in claim 3, wherein: the mounting seat portion of the fuel pump mounting member has a seat surface included in a fuel pump mounting plane (P1); the fuel pump mounting member has a seal member mounting plane along which the seal member is mounted; and the fuel pump mounting plane on the fuel pump mounting member and the seal member mounting plane of the fuel pump mounting member have different angles. ### Claim 8 (depends on 4) The internal combustion engine for a saddle-riding vehicle as claimed in claim 4, wherein: an upstream side fuel pipe is provided to feed fuel from a fuel tank to the fuel pump; the fuel pump has an intake side joint portion to which the upstream side fuel pipe is connected; and the intake side joint portion is disposed on a side of a head pipe of the saddle-riding vehicle. ### Claim 9 (depends on 8) The internal combustion engine for a saddle-riding vehicle as claimed in claim 8, wherein the fuel pump is disposed between a pair of left and right main frame members extending from the head pipe. ### Claim 10 (depends on 4) The internal combustion engine for a saddle-riding vehicle as claimed in claim 4, wherein: the mounting seat portion of the fuel pump mounting member has a seat surface included in a fuel pump mounting plane; the fuel pump mounting member has a seal member mounting plane along which the seal member is mounted; and the fuel pump mounting plane on the fuel pump mounting member and the seal member mounting plane of the fuel pump mounting member have different angles. ### Claim 11 (depends on 5) The internal combustion engine for a saddle-riding vehicle as claimed in claim 5, wherein: the mounting seat portion of the fuel pump mounting member has a seat surface included in a fuel pump mounting plane; the fuel pump mounting member has a seal member mounting plane along which the seal member is mounted; and the fuel pump mounting plane on the fuel pump mounting member and the seal member mounting plane of the fuel pump mounting member have different angles. ### Claim 12 (depends on 6) The internal combustion engine for a saddle-riding vehicle as claimed in claim 6, wherein: the mounting seat portion of the fuel pump mounting member has a seat surface included in a fuel pump mounting plane; the fuel pump mounting member has a seal member mounting plane along which the seal member is mounted; and the fuel pump mounting plane on the fuel pump mounting member and the seal member mounting plane of the fuel pump mounting member have different angles. ### Claim 13 (depends on 8) The internal combustion engine for a saddle-riding vehicle as claimed in claim 8, wherein: the mounting seat portion of the fuel pump mounting member has a seat surface included in a fuel pump mounting plane; the fuel pump mounting member has a seal member mounting plane along which the seal member is mounted; and the fuel pump mounting plane on the fuel pump mounting member and the seal member mounting plane of the fuel pump mounting member have different angles. ### Claim 14 (depends on 9) The internal combustion engine for a saddle-riding vehicle as claimed in claim 9, wherein: the mounting seat portion of the fuel pump mounting member has a seat surface included in a fuel pump mounting plane; the fuel pump mounting member has a seal member mounting plane along which the seal member is mounted; and the fuel pump mounting plane on the fuel pump mounting member and the seal member mounting plane of the fuel pump mounting member have different angles.