摘要:
A variable valve driving mechanism is provided with an eccentric member (14) having an annular eccentric portion (15), which is eccentric relative to a camshaft (11), and arranged on an outer periphery of the camshaft (11); an intermediate rotating member (16) having a first groove portion (16A) and second groove portion (16B), which extend in radial directions, and rotatably supported on the eccentric portion (15); a cam lobe (12) having a cam portion (6) for opening and closing an intake valve or exhaust valve (2) and arranged concentrically with and rotatable around the camshaft (11) and for rotation relative to the camshaft (11); a first pin member (17,23) slidably fitted at one end thereof in the first groove portion (16A) and connected at opposite end thereof to the camshaft (11) so that rotation of the camshaft (11) is transmitted to the intermediate rotating member (16); a second pin member (18,24) slidably fitted at one end thereof in the second groove portion (16B) and connected at opposite end thereof to the cam lobe (12) so that rotation of the intermediate rotating member (16) is. transmitted to the camshaft (11); and eccentric position adjusting means (30) for rotating the eccentric member (14) in accordance with a state of operation of the internal combustion engine.
摘要:
A control device includes a valve system which can selectively operate at least one of an intake and exhaust valves of an automobile engine by means low speed cams 12 or high speed cams 13. It further includes an engine speed detecting device; and operation mode determining device for determining whether the engine is in a low or high speed operation mode based on engine speed data, and for producing a signal indicative of a current operation mode. The control device varies a fuel supply suspending engine speed for each operation mode based on the signal from the operation mode determining device, and issues a fuel-supply suspending command when the current engine speed is above the fuel supply suspending engine speed. An optimum fuel supply suspending engine speed is set for each engine operation mode, so that the valve system can operate reliably even when operation mass applied thereto varies.
摘要:
The valve operating system structure with a variable valve timing mechanism of the invention comprises an intake valve or an exhaust valve provided for an engine, a low speed cam having a cam profile for a low speed valve timing and rotatable in response to rotation of a crankshaft of the engine, a high speed cam having a cam profile for a high speed valve timing and rotatable in response to rotation of the crankshaft, a main rocker arm for contacting with the low speed cam so as to be operated by the low speed cam, a sub rocker arm for contacting with the high speed cam so as to be operated by the high speed cam, mode change-over means for changing over the mode of the sub rocker arm between a non-interlocking mode in which the sub rocker arm is not interlocked with the main rocker arm and an interlocking mode in which the sub rocker arm is interlocked with the main rocker arm, a swing arm supported for pivotal motion and for adjustment in phase relative to the main rocker arm and having a valve contacting portion for contacting with the valve to drive the valve, and a hydraulic lash adjuster for adjusting the relative phase between the main rocker arm and the swing arm.
摘要:
A valve operating apparatus, which transmits the rotation of the crankshaft of an automotive engine to the intake and exhaust valves to open and close the valves, can selectively vary the timing to open and close the valves and ther lifts of the valves. The valve operating apparatus includes a camshaft with low- and high-speed cams and low- and high-speed rocker arms, one of which is fixed to and the other rotatably supported on a rocker shaft. The valves can be opened and closed by the low-speed rocker arm. The other rocker arm and the rocker shaft can be engaged and disengaged by an engaging mechanism that is actuated by an actuating mechanism depending on the operating condition of the engine.
摘要:
Disclosed is a temperature sensitive amorphous magnetic alloy which shows a Curie point of not higher than 200.degree. C. and whose composition is represented by the formula:(M.sub.1-a Ni.sub.a).sub.100-z X.sub.zwhereinM=Co or Fe;X=at least one of P, B, C and Si;0.2.ltoreq.a.ltoreq.0.8 when M is Co, or 0.4.ltoreq.a.ltoreq.0.9 when M is Fe; and15.ltoreq.z.ltoreq.30.
摘要翻译:公开了一种温度敏感的非晶磁性合金,其显示居里点不高于200℃,其组成由下式表示:(M1-a Nia)100-z Xz其中M = Co或Fe; X = P,B,C和Si中的至少一个; 当M为Co时,0.2 = a = 0,或当M为Fe时为0.4 = 0.9; 和15 = 30。
摘要:
In an engine which comprises a first intake valve and a second intake valve for each cylinder, configured to be driven by a first intake cam and a second intake cam, respectively, and a cam phase change mechanism configured to vary the phase of the second intake cam, the cam phase change mechanism is controlled so that the opening timing of the second intake valve is advanced ahead of that of the first intake valve in a start mode.
摘要:
An internal combustion engine includes: a variable valve train mechanism, configured to receive a cam displacement of an inlet cam so as to vary a driving output for driving an inlet valve continuously from a maximum valve lift to a minimum valve lift so as to match the driving output with a running condition of the internal combustion engine; and a control part, configured to control the variable valve train mechanism so as to set a valve lift of the inlet valve to a starter valve lift when starting the internal combustion engine in a cold state. The starter valve lift is formed so that a valve opening period of the inlet valve is set to encompass an overall area of an induction stroke period of the internal combustion engine from a top dead center to a bottom dead center of the induction stroke period.
摘要:
A valve mechanism for an internal combustion engine includes a first rocker arm (4) connected to an intake or exhaust valve and supported on a rocker shaft (3a), a second rocker arm (5) supported on the rocker shaft for being rotationally driven by a cam, a cylinder (10) formed on one of the first and second rocker arms (4, 5) and a first piston (11) provided in the cylinder, a contacting projection (4a) projecting on the other one of the first and second rocker arms, a return spring (12) for biasing the first piston in a direction in which the first piston contacts with the contacting projection, and a second piston (14) for displacing the first piston to a position at which the first piston does not contact with the contacting projection. The two pistons extend in parallel to each other when the first piston is at a non-contacting position.