Topic
Interference engine
About: Interference engine is a research topic. Over the lifetime, 552 publications have been published within this topic receiving 5425 citations.
Papers published on a yearly basis
1 / 2
Papers
Patent•
29 Apr 1992TL;DR: In this paper, a camshaft has opposed lobes (460a, 460b) which are received in opposed recesses (432a, 432b) of the sprocket, allowing the vane and sprocket to oscillate with respect to one another.
Abstract: A camshaft (426) has a vane (460) secured to an end thereof for non-oscillating rotation therewith. The camshaft also carries a sprocket (432) which can rotate with the camshaft but which is oscillatable with respect to the camshaft. The vane has opposed lobes (460a, 460b) which are received in opposed recesses (432a, 432b), respectively, of the sprocket. The recesses have greater circumferential extent than the lobes to permit the vane and sprocket to oscillate with respect to one another, and thereby permit the camshaft to change in phase relative to a crankshaft whose phase relative to the sprocket is fixed by virtue of a chain drive extending therebetween. The camshaft tends to change in reaction to pulses which it experiences during its normal operation, and it is permitted to change only in a given direction, either to advance or retard, by selectively blocking or permitting the flow of hydraulic fluid, preferably engine oil, through the return lines (494, 496) from the recesses by controlling the position of a spool (500) within a valve body (498) of a control valve in response to a signal indicative of an engine operating condition from an engine control unit (508).
168 citations
Patent•
18 Aug 1989
TL;DR: In this article, an intake-and/or exhaust-valve timing control system for an internal combustion engine comprises an inner sleeve having an outer toothed portion, firmly connected to a front end of a camshaft, a cam sprocket having an inner toothe portion, connected through a timing chain to an engine crankshaft, and a ring gear mechanism including inner and outer-toothed portions respectively meshing with the outer and outertooth portion of the sleeve and the inner-tooth portions of the cam sprockets, for changing
Abstract: An intake- and/or exhaust-valve timing control system for an internal combustion engine comprises an inner sleeve having an outer toothed portion, firmly connected to a front end of a camshaft, a cam sprocket having an inner toothed portion, connected through a timing chain to an engine crankshaft, and a ring gear mechanism including inner and outer toothed portions respectively meshing with the outer toothed portion of the sleeve and the inner toothed portion of the cam sprocket, for changing the intake and/or exhaust-valve timing of the engine. The valve timing control system also includes a knock-pin provided on the front end of the camshaft at a predetermined angular position of the camshaft and a positioning hole formed in the sleeve, for press-fitting the knock-pin thereinto, such that the location of the positioning hole determines the relative phase angle relationship between the knock-pin and a particular point on the outer cylindrical member which defines a reference angular position of the outer cylindrical member. Further provided is an adjusting screw, which engages one end of the ring gear member to provide axial sliding movement of the ring gear member, for fine adjusting the relative phase angle between the sleeve and the cam sprocket after installation of the ring gear member between the sleeve and the cam sprocket.
87 citations
Patent•
22 Mar 2000
TL;DR: In this paper, the phase angle of a camshaft of an internal combustion engine was adjusted by using a drive gear for driving a cam-shaft accommodated in a coaxial arrangement relative to the cam-aft and an electric motor communicating with the CAMshaft via a Harmonic Drive having a roller bearing with an elliptical inner ring.
Abstract: A device for adjusting the phase angle of a camshaft of an internal combustion engine includes a drive gear for driving a camshaft accommodated in a coaxial arrangement relative to the camshaft and an electric motor communicating with the camshaft via a Harmonic Drive having a roller bearing with an elliptical inner ring, an externally toothed, flexible gear arranged on the roller bearing, and a rigid, internally toothed gear engaging the externally toothed gear. A simple structure is achieved by providing the electric motor with a housing which is rigidly connected to the camshaft via retaining elements which extend through recesses in the drive gear so that the recesses restrict the allowable adjusting range of the camshaft.
84 citations
Patent•
10 Jun 1975
TL;DR: In this paper, a variable valve timing device controlling the timing of the intake valve, and a coupling between the accelerator pedal and the variable timing device was proposed to control the quantity of fuel mixture in the cylinder at the time of combustion.
Abstract: A piston-type internal combustion engine includes a variable valve timing device controlling the timing of the intake valve, and a coupling between the accelerator pedal and the variable timing device for varying the timing of the intake valve in response to the movement of the accelerator pedal, thereby controlling the quantity of the fuel mixture in the cylinder at the time of combustion. The engine also includes means for maintaining a substantially constant compression ratio in the cylinder notwithstanding variations in the engine output. A number of embodiments are disclosed. In one embodiment, the means for maintaining a substantially constant compression ratio in the cylinder comprises an auxiliary cylinder and an auxiliary piston movable therein, the inner end of the main and auxiliary pistons communicating with each other and defining a common chamber with their respective pistons, the auxiliary piston being displaceable within its cylinder to enlarge or decrease the volume of the common chamber.
76 citations
Patent•
28 Mar 1991
TL;DR: In this paper, an eccentric planet gear carrier is attached to the rotor of an electric motor whose stator is fixed in the housing (34), which will cause relative movement between the camshaft gear (5) and the motor.
Abstract: The camshaft (3) is driven (e.g. by belt or pulley) from a crankshaft through gear wheel (5) coupled to an extension (2). This acts as the ring gear of a planetary-type gearbox with an intermediary gear attached to the camshaft by bolt (20). An eccentric planet gear carrier (17) is fixed to the rotor (21) of an electric motor whose stator (22) is fixed in the housing (34). Excitation of the motor will cause relative movement between the camshaft gear (5) and the camshaft (3). ADVANTAGE - Exact positioning, no slip rings, min. friction loss. Minimises fuel consumption.
68 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 1 |
| 2017 | 7 |
| 2016 | 8 |
| 2015 | 12 |
| 2014 | 18 |
| 2013 | 16 |