A valve actuation system for actuating at least one of two or more engine valves in an internal combustion engine comprises at least one motion source including a first motion source configured to provide an exhaust main valve event. A valve train for conveying valve events from the at least one…
In an internal combustion engine provided with an electro-hydraulic system for variable actuation of the intake valves of the engine, each cylinder has two intake valves (VT, VS), associated with two intake conduits. A first intake conduit (4T) is configured so as to generate, within the cylinder…
A valvetrain for a type II engine comprises a valve bridge, a switching rocker arm, a center capsule, a first auxiliary rocker arm, and a first auxiliary capsule. The selectively switching rocker arm is configured to switch configurations to transfer a first valve actuation profile from a first…
A first head section is arranged between a first cylinder side wall and a second head section in the axial direction of a cam shaft. The second head section is arranged between a second cylinder side wall and the first head section in the axial direction of the cam shaft. The distance between the…
An internal combustion engine is provided with a plurality of cylinders, air intake valves (31) provided to each of the cylinders, and a variable valve actuation mechanism (600) for varying the valve actuation of the air intake valves (31). A motor (210) drives the variable valve actuation…
There is provided a saddle type vehicle comprising, supported for rocking motion on a vehicle body frame, a power unit (20) including an OHC type internal combustion engine (30) and a belt-type continuously variable transmission (21); the OHC type internal combustion engine (30) having a cylinder…
An internal combustion engine (11) includes a first rocker arm (63), a second rocker arm (64) including a side face (74S) facing the first rocker arm (63), an intake valve (41), a solenoid (100) for moving a connecting pin (90) between a non-connecting position and a complete connecting position…
An integrated engine brake assembly may include a valve that forces oil circulating through an engine to flow to an exhaust rocker arm when an engine brake lever is operated, a bridge that forms an interval with a pair of first and second exhaust valves installed on a combustion chamber, an…
A first head section is arranged between a first cylinder side wall and a second head section in the axial direction of a cam shaft. The second head section is arranged between a second cylinder side wall and the first head section in the axial direction of the cam shaft. The distance between the…
A control device (100) for an internal combustion engine (1) is provided with: a variable valve driving mechanism (10) capable of changing a working angle of an intake valve (19) while keeping a maximum magnitude of lift and opening timing constant; a reduction catalyst (9) which absorbs nitrogen…
An actuator (39) switches the position of a switching pin member (35) between a first position and a second position by pressurizing the switching pin member in the axial direction of a cam shaft (14). At least a portion of the switching pin member (35) overlaps with a head cover (7) when viewed…
A first rocker arm (36) is supported by a rocker shaft (33) and is provided to be able to operate a valve (24-27). A second rocker arm (37) is supported by the rocker shaft (33) and is arranged to line up with the first rocker arm (36) in the axial direction of a cam shaft (14). A switching pin…
To provide a variable valve apparatus for an OHC type internal combustion engine which can keep a good maintenance performance of an ignition plug while miniaturization of a cylinder head is achieved by disposing a pressing force generation source at a position which is not far from the ignition…
An internal-combustion engine with two intake valves (7A, 7B) for each cylinder is provided with a system for variable actuation of the intake valves, comprising a single solenoid valve for each cylinder that controls communication of the pressurized-fluid chamber (C) of the system with an exhaust…
A control device for an internal combustion engine includes: a camshaft of the internal combustion engine; a plurality of plane cam shape portions; at least one transitional shape portion; a cam switching mechanism; a cam position sensor; and a control section. The plurality of plane cam shape…
The present invention relates to a structure of oil control valve for variable lift of engine valve. The engine (3) at least comprises a crankcase (31), a cylinder block (32) mounted on the crankcase (31), and a cylinder head (33) mounted on the cylinder block (32). The cylinder block (32)…
A variable valve device and a method of controlling the variable valve device, wherein, in order to prevent a shortage of oil film in a spool section, only the spool of a solenoid on/off valve is moved at a timing not affecting operation of an air intake valve, to thereby stabilize operation of the…
A main CPU determines whether or not there is a request for one valve driving based on an engine operating state such as an engine speed and a load factor, with reference to a control map (S10). When it is determined that there is a request for one valve driving (i.e., an affirmative determination…
A control apparatus is provided for a valve actuating system (1) which is operable to lift an intake valve (2) or an exhaust valve (37) of an internal combustion engine and includes a lift characteristic changing mechanism for changing a lift characteristic of the intake valve or the exhaust valve…
An engine has four cylinders (2A-2D) each with a piston and a combustion chamber with a spark plug connected to the ignition circuit, while fuel is injected by an injector (9) with a needle valve and a solenoid. An oxygen sensor (23) connected to a three-way catalyst (24) measures the air-fuel…
An engine has four cylinders (2A-2D) each with a piston and a combustion chamber with a spark plug connected to the ignition circuit, while fuel is injected by an injector (9) with a needle valve and a solenoid. An oxygen sensor (23) connected to a three-way catalyst (24) measures the air-fuel…
There is provided a fuel injection control system and method for an internal combustion engine including two types of variable valve mechanisms capable of changing a camp phase and a cam profile, respectively, which control system and method are capable of determining an amount of fuel to be…
The invention relates to a spark-ignition internal combustion engine comprising a combustion chamber, a fuel injection means (13) for injecting fuel, an air amount control means (28) for controlling intake air amount into a combustion chamber (7), an ignition means (14) for igniting the mixture of…
The valve control uses camshafts (11,12) for operation of the i.c. engine gas changing valves (7,8), with one or more valves having a stroke which is altered via a switch element (15) having a switching time which is dependent on the engine revs and detected from the rotary oscillation of the…