公开(公告)号：US20190211717A1

公开(公告)日：2019-07-11

申请号：US16315134

申请日：2017-06-28

Applicant: SCANIA CV AB

Inventor： Niclas GUNNARSSON ,  Erik HÖCKERDAL

IPC: F01L1/344

CPC classification number: F01L1/344 ,  F01L1/34 ,  F01L13/06 ,  F02D13/0219 ,  F02D13/04 ,  F02D41/022 ,  F02D41/023 ,  F02D2041/001 ,  F02D2200/101 ,  F02D2250/18 ,  F16H61/12 ,  F16H61/21 ,  F16H63/50 ,  F16H2059/147

Abstract: Provided is a method for changing gear ratio in a gearbox comprising: receiving a signal to change the gear ratio; calculating braking torque that the engine should provide to reduce the rotational speed of the engine to a target rotational speed; phase-shifting a second camshaft in relation to the crankshaft, to a state where the exhaust valve is controlled to be opened during the expansion stroke and closed during the exhaust stroke; disconnecting the engine from the driving wheel; opening and closing the exhaust valve with a decompression device in a transition area between an exhaust stroke and an inlet stroke and also between a compression stroke and an expansion stroke, when the piston is at a top dead center in the cylinder to achieve engine braking through compression in the cylinders during the exhaust stroke and the compression stroke, and f) shifting a gear in the gearbox.

公开(公告)号：US20170002702A1

公开(公告)日：2017-01-05

申请号：US15039746

申请日：2014-12-03

Applicant: SCANIA CV AB

Inventor： Niclas GUNNARSSON ,  Cedric NYBERG ,  Eric OLOFSSON

IPC: F01L13/06 ,  F01L1/344 ,  F01L1/047 ,  F02B75/02

CPC classification number: F01L13/06 ,  F01L1/047 ,  F01L1/344 ,  F02B75/02 ,  F02B2075/027 ,  F02D13/0249 ,  F02D13/0273 ,  F02D13/04

Abstract: A method to control a four-stroke combustion engine, comprising at least one cylinder; a piston arranged in each cylinder; at least one inlet valve arranged in each cylinder which is connected with an inlet system; at least one first camshaft which controls each inlet valve; at least one exhaust valve arranged in each cylinder which is connected with an exhaust system; at least one second camshaft which controls each exhaust valve; and a crankshaft which controls each camshaft. At least one phase-shifting device is arranged between the crankshaft and the second camshaft, to phase-shift the second camshaft in relation to the crankshaft to a state, where the exhaust valve is controlled in such a way, that it is opened during the expansion stroke of the engine and closed during the exhaust stroke of the engine, to achieve engine braking through compression in the cylinders during the exhaust stroke.

Abstract translation: 一种控制四冲程内燃机的方法，包括至少一个汽缸; 一个排列在每个气缸中的活塞; 至少一个入口阀，布置在每个气缸中，其与入口系统连接; 至少一个第一凸轮轴，其控制每个入口阀; 至少一个排气阀，布置在与排气系统连接的每个气缸中; 至少一个第二凸轮轴，其控制每个排气阀; 以及控制每个凸轮轴的曲轴。 至少一个相移装置设置在曲轴和第二凸轮轴之间，以使第二凸轮轴相对于曲轴相移至排气门以这种方式被控制的状态，即在 发动机的膨胀冲程并且在发动机的排气冲程期间关闭，以在排气冲程期间通过气缸中的压缩来实现发动机制动。

公开(公告)号：US20160208722A1

公开(公告)日：2016-07-21

申请号：US14915132

申请日：2014-09-09

Applicant: SCANIA CV AB

Inventor： Niclas GUNNARSSON

IPC: F02D41/12 ,  F01L1/344 ,  F02D13/02

CPC classification number: F02D41/123 ,  B60T1/062 ,  F01L1/344 ,  F01L13/06 ,  F02D13/0207 ,  F02D13/04

Abstract: A method and vehicle embodying the method are provided for deceleration of a vehicle comprising a combustion engine comprising at least one cylinder to which fuel is supplied, a piston in each cylinder, at least one inlet valve in each cylinder, which is connected with an inlet system, a first camshaft controlling the inlet valve, at least one exhaust valve in each cylinder, which is connected with an exhaust system, a second camshaft controlling the at least one exhaust valve and a crankshaft controlling each camshaft. The method comprising a) closing the fuel supply to all cylinders, b) phase-shifting each camshaft in relation to the crankshaft to a position where no air is supplied to the exhaust system when the pistons move forwards and backwards in each cylinder, and c) controlling a gearbox to engage a gear that increases the crankshaft's rotation speed, which decreases the vehicle's speed.

Abstract translation: 提供一种实施该方法的方法和车辆，其用于减速车辆，该车辆包括内燃机，所述内燃机包括至少一个供应燃料的气缸，每个气缸中的活塞，每个气缸中的至少一个入口阀，其与入口 系统，控制入口阀的第一凸轮轴，每个气缸中的至少一个与排气系统连接的排气阀，控制至少一个排气阀的第二凸轮轴和控制每个凸轮轴的曲轴。 该方法包括：a）关闭所有气缸的燃料供应; b）当每个气缸中的活塞向前和向后移动时，将每个凸轮轴相对于曲轴相移到不排放空气的位置; c ）控制齿轮箱以接合增加曲轴的转速的齿轮，这降低了车辆的速度。