| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123021000 | CONVERTIBLE CYCLE | 10 |
| 20090199790 | Engine control strategy - An internal combustion engine ( | 08-13-2009 |
| 20100012053 | MULTI-STROKE VARIABLE DISPLACEMENT ENGINE - A vehicle propulsion system and method of operation are presented. As one example, the method includes operating an engine to produce an engine output; transferring the engine output to one or more drive wheels of the vehicle via a transmission; responsive to a first condition, varying torque supplied to the drive wheels by adjusting a relative number of combusting cylinders and deactivated cylinders of the engine; and responsive to a second condition, varying the torque supplied to the drive wheels by adjusting a number of strokes performed by the combusting cylinders per combustion cycle while shifting the transmission between different gear ratios. | 01-21-2010 |
| 20100275860 | Control architecture and optimal strategy for switching between 2-stroke and 4-stroke modes of HCCI operation - Engine correction inputs to control oscillation in an engine output in a transition between 2-stroke and 4-stroke engine cycle modes of an HCCI engine are determined as follows: for each mode, valve timings which modify the engine output the most upon switching are determined, and a linear engine system model is defined at least partially based on the determined valve timings, which model provides mappings relating initial conditions of the engine and the engine correction inputs to outputs of the engine; initial conditions of the engine corresponding to a switching point for switching between the two modes are determined; desired engine output conditions upon switching between the two modes are specified; and the engine correction inputs are determined by using the determined initial conditions, the desired engine output conditions, and the linear engine system model corresponding to the engine cycle mode in effect upon switching. | 11-04-2010 |
| 20100300383 | Methods and Systems for Engine Control - Methods and systems for controlling an engine are provided. In some examples, the method includes transitioning from operating a cylinder with a first number of strokes per combustion cycle to a second, lesser, number of strokes per combustion cycle in response to boost pressure rising above a threshold boost value. In additional examples, the method includes boosting intake air delivered to the cylinder, operating the cylinder with four strokes per combustion cycle—during at least the operation with four strokes per combustion cycle, adjusting boost of the intake air responsive to operating condition—transitioning from the operation with four strokes per combustion cycle to two strokes per combustion cycle in response to a selected condition only when a boost is greater than a threshold boost amount and when cylinder peak combustion pressure is greater than a threshold peak cylinder pressure, adjusting throttling, spark timing, and the boost during the transition from the operation with four strokes per combustion cycle to two strokes per combustion cycle and transitioning from the operation with two strokes per combustion cycle to four strokes per combustion cycle based on engine speed and torque requested. | 12-02-2010 |
| 20110239963 | MULTI-STROKE VARIABLE DISPLACEMENT ENGINE - A vehicle propulsion system and method of operation are presented. As one example, cylinder deactivation and transitioning from four to two strokes is coordinated with transmission shifting to improve vehicle response. Additionally, it is possible to reduce transitions in operating modes to improve drive feel. | 10-06-2011 |
| 20110253073 | Multi-Stroke Internal Combustion Engine - An internal combustion engine system and method of its operation are described. As one example, the method includes: repeatedly opening a first intake valve of a combustion chamber of the engine once every four piston strokes; transitioning operation of the combustion chamber from a four stroke cycle to a two stroke cycle by activating a second intake valve of the combustion chamber to repeatedly open once every four piston strokes during a different intake stroke than the first intake valve; and transitioning operation of the combustion chamber from the two stroke cycle to the four stroke cycle by deactivating the second intake valve in a closed position. In this way, the engine may be selectively operated in a two stroke cycle or a four stroke cycle by activating or deactivating or activating one of the intake valves while another of the intake valves continues to operate. | 10-20-2011 |
| 20120167841 | CONTROL STRATEGY FOR MULTI-STROKE ENGINE SYSTEM - An engine system and a method of operation are described. The engine may be operating in two-stroke and four-stroke modes while still maintaining a target exhaust air-fuel ratio. | 07-05-2012 |
| 20120247408 | MULTI-STROKE HYBRID PROPULSION SYSTEM - A hybrid propulsion system for a vehicle and method of operation are described. In one example, the engine may operate in a two stroke cycle to provide increased engine torque when a recharging operation of the on-board energy storage device is requested. Further, a transition from a four stroke cycle to the two stroke cycle may be performed while maintaining the transmission in the previously selected gear ratio in response to a requested increase in charging or a requested increase in wheel torque as requested by the vehicle operator. | 10-04-2012 |
| 20130319350 | MULTI-STROKE VARIABLE DISPLACEMENT ENGINE - A vehicle propulsion system and method of operation are presented. As one example, cylinder deactivation and transitioning from four to two strokes is coordinated with transmission shifting to improve vehicle response. Additionally, it is possible to reduce transitions in operating modes to improve drive feel. | 12-05-2013 |
| 20140158067 | VARIABLE CYCLE ENGINE - A variable cycle engine may include a first cylinder that performs an intake, a compression, an explosion, or an exhaust stroke, a second cylinder that performs an intake, a compression, an explosion, or an exhaust stroke, a connection rail that is formed near the first cylinder and the second cylinder, a first variable port that is diverged from one side of the connection rail and is connected to the first cylinder, a second variable port that is diverged from the other side of the connection rail and is connected to the second cylinder, and a first variable control valve disposed on the first variable port and a second variable control valve disposed on the second variable port, wherein the first and second variable control valves are opened or closed accordingly with respect to each other to directly connect the first cylinder with the second cylinder. | 06-12-2014 |
