# US 10,309,323 B2 · Control apparatus for vehicle

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- Number: US 10,309,323 B2
- Document ID: US10309323B2
- Status: Granted
- Kind: B2
- Application number: 15/202,733
- Filed: 2016-07-06
- Published: 2017-01-12
- Granted: 2019-06-04
- Earliest claimed: 2015-07-08
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Hideyuki Nishida
- Web page: https://patentgrep.com/patent/US10309323B2

## CPC

- F02D 13/04: using engine as brake
- B60T 13/46: Vacuum systems
- B60T 13/662: {characterised by specified functions of the control system components}
- B60T 17/02: Arrangements of pumps or compressors, or control devices therefor
- F01L 13/06: for braking
- F02D 13/0207: {changing valve lift or valve lift and timing}
- F02D 29/02: peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
- F02D 41/0005: {during deceleration}
- F02D 41/022: {in relation with the clutch status}
- F02D 41/12: for deceleration {(F02D41/0005, F02D41/107 take precedence)}
- F02D 41/123: {the fuel injection being cut-off}
- F01L 2800/03: Stopping; Stalling
- F02D 41/042: {for stopping the engine}
- F02D 2041/001: {for engines with variable valve actuation}
- F02D 2250/41: Control to generate negative pressure in the intake manifold, e.g. for fuel vapor purging or brake booster
- Y02T 10/40: Engine management systems
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A vehicle having a valve stop mode control unit configured such that an intake valve and an exhaust valve are stopped in a closed state during rotation of an output shaft, supply of fuel to an engine is stopped, a clutch is made to be in an engaged state, and pistons are driven by rotational forces from driving wheels through the output shaft. When there is a request for valve stop inertial running, a negative pressure is supplied to an intake passage by a vacuum pump.

## Claims

### Claim 1

A control apparatus for a vehicle and configured to control the vehicle, the control apparatus comprising:
a valve operation mechanism that can stop intake valves and exhaust valves in an engine in a closed state during rotation of an output shaft of the engine;
a vacuum pump connected to an intake passage section through a branch passage, the branch passage having a vacuum switching valve to selectively realize open and closed states of the branch passage;
a clutch that can switch a power transmission route between the engine and a driving wheel between an engaged state and a disengaged state; and
an electronic control unit (ECU) including a computer, memory, an input interface, and an output interface, the computer including a processor for executing programs stored in the memory for controlling various controls of the vehicle, wherein
the ECU is configured to stop the intake valves and the exhaust valves in all cylinders of the engine in the closed state during the rotation of the output shaft, stop supply of fuel to the engine, control a throttle valve of the engine to an idling opening or less, and set the clutch in the engaged state to drive pistons of the engine by a rotational force of the driving wheel through the output shaft, in a case where a request for valve stop inertial running is made; and
the ECU is configured to control a valve actuator to control the valve switching valve to realize the open state of the branch passage and thus the vacuum pump supplies a negative pressure to the intake passage section so that an intake conduit pressure is below a predetermined upper limit value lower than an atmospheric pressure all the time until fuel injection restarts, in the case where the request for valve stop inertial running is made.

### Claim 2 (depends on 1)

The control apparatus for the vehicle according to claim 1, wherein the vacuum pump is configured to supply a negative pressure to a brake booster for assisting a brake force of a brake.