Back to results
US 6,886,532 B2Granted
Intake system of internal combustion engine
AssigneeNissan Motor Co., Ltd.
InventorsTsuneyasu Nohara, Shinichi Takemura, Shunichi Aoyama, Takanobu Sugiyama
Life of this patent
Estimating the term…
Abstract
A collector equipped intake system of an internal combustion engine, the collector is fixedly connected directly to either of a cylinder-head side wall and a collector mounting bracket hermetically covering perimeters of intake-port opening end portions of a plurality of intake ports opening through the side wall. A plurality of intake-manifold branches respectively communicating with the plurality of intake ports, are protruded into the interior space of the collector.
Claims27
An intake system of an internal combustion engine, comprising:
- a collector fixedly connected directly to at least one of a side wall of a cylinder head and a collector mounting bracket hermetically covering perimeters of intake-port opening end portions of a plurality of intake ports opening through the side wall;
- a plurality of intake-manifold branches respectively communicating with the plurality of intake ports and protruded into an interior space of the collector;
- a variable valve actuation system that continuously variably adjusts a valve lift characteristic of an intake valve, the variable valve actuation system comprising a first variable valve actuation mechanism capable of continuously variably adjusting the working angle and the lift of the intake valve;
- a control unit configured to be electronically connected to the variable valve actuation system for variably controlling an intake-air quantity through the variable valve actuation system;
- wherein the first variable valve actuation mechanism comprises:
- a drive shaft;
- an eccentric cam driven by the drive shaft;
- a first link fitted to an outer periphery of the eccentric cam to permit relative rotation of the first link to the eccentric cam;
- a control shaft arranged parallel to the drive shaft and comprising a control cam whose axis is eccentric to an axis of the control shaft;
- a rocker arm fitted to an outer periphery of the control cam to permit relative rotation of the rocker arm to the control cam, wherein the rocker arm is connected at one end to the first link so that an oscillating motion of the rocker arm is produced through the first link;
- and
- a rockable cam rotatably supported on the drive shaft, connected to another end of the rocker arm via a second link, and configured to be in abutted engagement with a valve lifter of the intake valve so that the valve lifter is pushed by cam action of the rockable cam oscillating through the rocker arm;
- wherein the working angle and the lift of the intake valve are simultaneously adjusted by varying a center of rotation of the control cam of the control shaft.
10 more elements
An intake system of an internal combustion engine, comprising;
- a collector fixedly connected directly to at least one of a side wall of a cylinder head and a collector mounting bracket hermetically covering perimeters of intake-port opening end portions of a plurality of intake ports opening through the side wall;
- a plurality of intake-manifold branches respectively communicating with the plurality of intake ports and protruded into an interior space of the collector;
- and
- a recessed portion, which is provided to avoid an interference between the collector and a fuel injection valve that injects fuel spray into an associated one of the intake ports, and formed as a recess on an outer periphery of the collector.
1 more element
An intake system of an internal combustion engine, comprising:
- a collector fixedly connected directly to at least one of a side wall of a cylinder head and a collector mounting bracket hermetically covering perimeters of intake-port opening end portions of a plurality of intake ports opening through the side wall;
- a plurality of intake-manifold branches respectively communicating with the plurality of intake ports and protruded into an interior space of the collector;
- and
- a pressure control valve located upstream of the collector to adjust a vacuum pressure in the collector to a predetermined constant pressure value.
1 more element
An intake system of an internal combustion engine comprising an intake valve and a variable valve actuation mechanism, the variable valve actuation mechanism comprising:
- (a) a drive shaft;
- (b) an eccentric cam driven by the drive shaft;
- (c) a first link fitted to an outer periphery of the eccentric cam to permit relative rotation of the first link to the eccentric cam;
- (d) a control shaft arranged parallel to the drive shaft and comprising a control cam whose axis is eccentric to an axis of the control shaft;
- (e) a rocker arm fitted to an outer periphery of the control cam to permit relative rotation of the rocker arm to the control cam, wherein the rocker arm is connected at one end to the first link so that an oscillating motion of the rocker arm is produced through the first link;
- (f) a second link rotatably connected to another end of the rocker arm;
- and
- (g) a rockable cam rotatably supported on the drive shaft, rotatably connected to the second link, and configured to be in abutted engagement with a valve lifter of the intake valve so that the valve lifter is pushed by cam action of the oscillating rockable cam,
- wherein a working angle and a lift of the intake valve are simultaneously adjustable by varying a center of rotation of the control cam of the control shaft, and the variable valve actuation mechanism is capable of continuously variably adjusting the working angle and the lift of the intake valve;
- (h) a control unit connected to the variable valve actuation mechanism and configured to variably control an intake-air quantity to the intake valve;
- (i) a collector fixedly connected directly to at least one of a side wall of a cylinder head and a collector mounting bracket hermetically covering perimeters of intake-port opening end portions of a plurality of intake ports opening through the side wall;
- and
- (j) a plurality of intake-manifold branches respectively communicating with the plurality of intake ports and protruded into an interior space of the collector.
10 more elements
Dependencies are inferred from the claim text.